#,Fact,Value,Unit,Geography,Data period,Source,Publisher,URL (opened),Accessed date,Tier,Methodology notes,Limitations,Suggested citation
1,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1647,establishments,Alabama,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
2,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",264,establishments,Alaska,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
3,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",2567,establishments,Arizona,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
4,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1145,establishments,Arkansas,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
5,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",11686,establishments,California,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
6,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",2620,establishments,Colorado,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
7,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1318,establishments,Connecticut,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
8,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",344,establishments,Delaware,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
9,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",37,establishments,District of Columbia,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
10,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",9353,establishments,Florida,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
11,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",3101,establishments,Georgia,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
12,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",403,establishments,Hawaii,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
13,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",904,establishments,Idaho,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
14,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",4070,establishments,Illinois,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
15,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",2008,establishments,Indiana,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
16,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1108,establishments,Iowa,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
17,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1028,establishments,Kansas,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
18,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1379,establishments,Kentucky,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
19,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1623,establishments,Louisiana,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
20,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",781,establishments,Maine,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
21,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1986,establishments,Maryland,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
22,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",3069,establishments,Massachusetts,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
23,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",2661,establishments,Michigan,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
24,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1816,establishments,Minnesota,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
25,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",709,establishments,Mississippi,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
26,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1915,establishments,Missouri,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
27,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",712,establishments,Montana,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
28,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",837,establishments,Nebraska,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
29,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",909,establishments,Nevada,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
30,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",776,establishments,New Hampshire,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
31,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",3454,establishments,New Jersey,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
32,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",691,establishments,New Mexico,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
33,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",7061,establishments,New York,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
34,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",3973,establishments,North Carolina,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
35,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",336,establishments,North Dakota,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
36,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",2970,establishments,Ohio,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
37,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1592,establishments,Oklahoma,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
38,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1337,establishments,Oregon,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
39,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",4154,establishments,Pennsylvania,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
40,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",494,establishments,Rhode Island,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
41,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1685,establishments,South Carolina,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
42,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",401,establishments,South Dakota,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
43,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1899,establishments,Tennessee,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
44,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",8966,establishments,Texas,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
45,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1443,establishments,Utah,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
46,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",303,establishments,Vermont,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
47,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",2765,establishments,Virginia,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
48,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",2242,establishments,Washington,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
49,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",406,establishments,West Virginia,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
50,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",1944,establishments,Wisconsin,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
51,"Establishments, NAICS 238220 plumbing, heating and air-conditioning contractors",315,establishments,Wyoming,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"State file, lfo='-' (all legal forms), naics=238220",Includes plumbing contractors; excludes nonemployer firms,"U.S. Census Bureau, County Business Patterns 2023"
52,"Establishments, NAICS 238220, sum of 50 states and DC",111207,establishments,United States,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,Sum of rows 1 to 51,Includes plumbing contractors,"U.S. Census Bureau, County Business Patterns 2023"
53,"Paid employees (week of March 12), NAICS 238220, sum of 50 states and DC",1214761,employees,United States,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,"Sum of state emp fields (all flagged G, no suppression)",Includes plumbing contractors,"U.S. Census Bureau, County Business Patterns 2023"
54,"Establishments, NAICS 238220, national file",111207,establishments,United States,2023,"County Business Patterns 2023, U.S. file cbp23us",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23us.zip,2026-11-02,1,"US file row naics=238220, lfo='-'",Matches row 52,"U.S. Census Bureau, County Business Patterns 2023"
55,NAICS 238220 rows in the CBP 2023 state file (all states and legal forms),262,rows,United States,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,Count of rows with naics=238220 in raw/cbp23st_238220_extract.csv,Processing count,"U.S. Census Bureau, County Business Patterns 2023"
56,Legal-form split rows excluded (lfo not '-'),211,rows,United States,2023,"County Business Patterns 2023, state file cbp23st (NAICS 238220)",U.S. Census Bureau,https://www2.census.gov/programs-surveys/cbp/datasets/2023/cbp23st.zip,2026-11-02,1,262 rows minus 51 state totals,Processing count,"U.S. Census Bureau, County Business Patterns 2023"
57,Performance bond required of new certified HVAC contractors,20000,USD,Alabama,current rule,"Ala. Admin. Code ch. 440-X-3, Licensing and fees",Alabama Legislative Services Agency,https://admincode.legislature.state.al.us/api/chapter/440-X-3,2026-11-02,1,Read rule 440-X-3,Bond amount only; insurance not coded,"Alabama Legislative Services Agency, Ala. Admin. Code ch. 440-X-3, Licensing and fees, accessed 2026-11-02"
58,"Initial certification fee, active heating and air conditioning license",220,USD,Alabama,effective 2024-10-14,"Ala. Admin. Code ch. 440-X-3, Licensing and fees",Alabama Legislative Services Agency,https://admincode.legislature.state.al.us/api/chapter/440-X-3,2026-11-02,1,Fee table in 440-X-3,Fees change by rule,"Alabama Legislative Services Agency, Ala. Admin. Code ch. 440-X-3, Licensing and fees, accessed 2026-11-02"
59,Written examination fee,175,USD,Alabama,effective 2024-10-14,"Ala. Admin. Code ch. 440-X-3, Licensing and fees",Alabama Legislative Services Agency,https://admincode.legislature.state.al.us/api/chapter/440-X-3,2026-11-02,1,Fee table in 440-X-3,Fees change by rule,"Alabama Legislative Services Agency, Ala. Admin. Code ch. 440-X-3, Licensing and fees, accessed 2026-11-02"
60,Days to notify the board after a certified contractor separates from the entity,5,days,Alabama,current rule,"Ala. Admin. Code ch. 440-X-3, Licensing and fees",Alabama Legislative Services Agency,https://admincode.legislature.state.al.us/api/chapter/440-X-3,2026-11-02,1,Rule on loss of certified contractor,Entity must stop contracting immediately,"Alabama Legislative Services Agency, Ala. Admin. Code ch. 440-X-3, Licensing and fees, accessed 2026-11-02"
61,Maximum life of an emergency certification after death or incapacity of the certified contractor,90,days,Alabama,current rule,"Ala. Admin. Code ch. 440-X-3, Licensing and fees",Alabama Legislative Services Agency,https://admincode.legislature.state.al.us/api/chapter/440-X-3,2026-11-02,1,Same rule,Death or incapacity only,"Alabama Legislative Services Agency, Ala. Admin. Code ch. 440-X-3, Licensing and fees, accessed 2026-11-02"
62,Days to notify the registrar after a qualifying party disassociates,15,days,Arizona,current,"A.R.S. 32-1127.01, Qualifying parties; disassociation",Arizona State Legislature,https://www.azleg.gov/ars/32/01127-01.htm,2026-11-02,1,A.R.S. 32-1127.01(A),As stated in the official text,"Arizona State Legislature, A.R.S. 32-1127.01, Qualifying parties; disassociation, accessed 2026-11-02"
63,Days to requalify through another person before automatic suspension,60,days,Arizona,current,"A.R.S. 32-1127.01, Qualifying parties; disassociation",Arizona State Legislature,https://www.azleg.gov/ars/32/01127-01.htm,2026-11-02,1,"A.R.S. 32-1127.01(B),(C)",As stated in the official text,"Arizona State Legislature, A.R.S. 32-1127.01, Qualifying parties; disassociation, accessed 2026-11-02"
64,"Minimum surety bond for applicants with annual volume under $150,000 (one bond tier)",5000,USD,Arizona,current,"A.R.S. 32-1152, Bonds",Arizona State Legislature,https://www.azleg.gov/ars/32/01152.htm,2026-11-02,1,A.R.S. 32-1152,Bond scales with class and volume,"Arizona State Legislature, A.R.S. 32-1152, Bonds, accessed 2026-11-02"
65,Class A HVACR license fee,200,USD,Arkansas,2022 form,HVACR license application (2022),Arkansas Department of Labor and Licensing,https://www.labor.arkansas.gov/wp-content/uploads/2022/01/HVACR-License-2022-1.pdf,2026-11-02,1,Application form,Form dated 2022,"Arkansas Department of Labor and Licensing, HVACR license application (2022), accessed 2026-11-02"
66,Class B HVACR license fee,150,USD,Arkansas,2022 form,HVACR license application (2022),Arkansas Department of Labor and Licensing,https://www.labor.arkansas.gov/wp-content/uploads/2022/01/HVACR-License-2022-1.pdf,2026-11-02,1,Application form,Form dated 2022,"Arkansas Department of Labor and Licensing, HVACR license application (2022), accessed 2026-11-02"
67,Class B cooling capacity limit per unit,25,tons,Arkansas,current rule,"17 CAR pt. 261, HVACR Licensing Board rules",Arkansas Department of Labor and Licensing,https://labor.arkansas.gov/wp-content/uploads/17CARpt.261.pdf,2026-11-02,1,17 CAR 261-103,As stated in the official text,"Arkansas Department of Labor and Licensing, 17 CAR pt. 261, HVACR Licensing Board rules, accessed 2026-11-02"
68,Days to replace a disassociated qualifier,90,days,California,current,Cal. Bus. & Prof. Code 7068.2 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),California Legislative Information,https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC&sectionNum=7068.2,2026-11-02,1,BPC 7068.2,One 90-day extension possible,"California Legislative Information, Cal. Bus. & Prof. Code 7068.2 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
69,Maximum days to replace a qualifier with an extension (dispute or death),180,days,California,current,Cal. Bus. & Prof. Code 7068.2 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),California Legislative Information,https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC&sectionNum=7068.2,2026-11-02,1,BPC 7068.2(e),As stated in the official text,"California Legislative Information, Cal. Bus. & Prof. Code 7068.2 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
70,Contractor bond,25000,USD,California,current,Cal. Bus. & Prof. Code 7071.6 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),California Legislative Information,https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC&sectionNum=7071.6,2026-11-02,1,BPC 7071.6(a),As stated in the official text,"California Legislative Information, Cal. Bus. & Prof. Code 7071.6 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
71,"Application fee, original license in one classification",450,USD,California,current,Cal. Bus. & Prof. Code 7137 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),California Legislative Information,https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC&sectionNum=7137,2026-11-02,1,BPC 7137(a)(1)(A),Board may raise to $563,"California Legislative Information, Cal. Bus. & Prof. Code 7137 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
72,"Initial license fee, individual owner",200,USD,California,current,Cal. Bus. & Prof. Code 7137 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),California Legislative Information,https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC&sectionNum=7137,2026-11-02,1,BPC 7137(a)(3)(A),As stated in the official text,"California Legislative Information, Cal. Bus. & Prof. Code 7137 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
73,"Initial license fee, partnership, corporation, LLC or joint venture",350,USD,California,current,Cal. Bus. & Prof. Code 7137 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),California Legislative Information,https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC&sectionNum=7137,2026-11-02,1,BPC 7137(a)(3)(B),As stated in the official text,"California Legislative Information, Cal. Bus. & Prof. Code 7137 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
74,Hours per week that define an actively engaged responsible managing employee,32,hours,California,current,Cal. Bus. & Prof. Code 7068 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),California Legislative Information,https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC&sectionNum=7068,2026-11-02,1,BPC 7068(c)(2)(B),Or 80 percent of business hours if less,"California Legislative Information, Cal. Bus. & Prof. Code 7068 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
75,"Supervised experience after a journeyman apprenticeship, master HVACR",2,years,Delaware,current,"24 Del. C. ch. 18, subch. III",Delaware General Assembly,https://delcode.delaware.gov/title24/c018/sc03/index.html,2026-11-02,1,24 Del. C. 1821(a)(1),As stated in the official text,"Delaware General Assembly, 24 Del. C. ch. 18, subch. III, accessed 2026-11-02"
76,"Alternative supervised experience path, master HVACR",7,years,Delaware,current,"24 Del. C. ch. 18, subch. III",Delaware General Assembly,https://delcode.delaware.gov/title24/c018/sc03/index.html,2026-11-02,1,24 Del. C. 1821,As stated in the official text,"Delaware General Assembly, 24 Del. C. ch. 18, subch. III, accessed 2026-11-02"
77,Experience for master refrigeration and air conditioning mechanic,5,consecutive years,District of Columbia,current,"D.C. Code 47-2853.202, Eligibility requirements (refrigeration and air conditioning mechanics)",Council of the District of Columbia,https://code.dccouncil.gov/us/dc/council/code/sections/47-2853.202,2026-11-02,1,D.C. Code 47-2853.202(b),Systems larger than 25 compressor horsepower,"Council of the District of Columbia, D.C. Code 47-2853.202, Eligibility requirements (refrigeration and air conditioning mechanics), accessed 2026-11-02"
78,Active experience required for certified contractor exam (incl. 1 year as foreman),4,years,Florida,2026,Fla. Stat. ch. 489 (2026),Florida Legislature,http://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0400-0499/0489/0489.html,2026-11-02,1,Fla. Stat. 489.111(2)(c),As stated in the official text,"Florida Legislature, Fla. Stat. ch. 489 (2026), accessed 2026-11-02"
79,Days a business organization has to employ a new qualifying agent,60,days,Florida,2026,Fla. Stat. ch. 489 (2026),Florida Legislature,http://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0400-0499/0489/0489.html,2026-11-02,1,Fla. Stat. 489.119(3)(a),As stated in the official text,"Florida Legislature, Fla. Stat. ch. 489 (2026), accessed 2026-11-02"
80,Days a business must wait to keep contracting after its licensee stops qualifying it,0,days,Georgia,current rule,Ga. Comp. R. & Regs. ch. 121-3,Georgia Secretary of State,https://rules.sos.ga.gov/gac/121-3,2026-11-02,1,Rule 121-3-.05(b): cease until requalified,Coded 0,"Georgia Secretary of State, Ga. Comp. R. & Regs. ch. 121-3, accessed 2026-11-02"
81,Days to notify the board after the RME leaves,60,days,Hawaii,current,Maintain Entity: RME Requirements,Hawaii Contractors License Board,https://cca.hawaii.gov/pvl/boards/contractor/maintain-entity-rme-requirements/,2026-11-02,1,Board guidance,As stated in the official text,"Hawaii Contractors License Board, Maintain Entity: RME Requirements, accessed 2026-11-02"
82,Days to qualify a new RME or go inactive before forfeiture,90,days,Hawaii,current,Maintain Entity: RME Requirements,Hawaii Contractors License Board,https://cca.hawaii.gov/pvl/boards/contractor/maintain-entity-rme-requirements/,2026-11-02,1,Board guidance,As stated in the official text,"Hawaii Contractors License Board, Maintain Entity: RME Requirements, accessed 2026-11-02"
83,Interim period after death of a company's master HVAC contractor,180,days,Kentucky,current,815 KAR 8:010,Kentucky Legislative Research Commission,https://apps.legislature.ky.gov/law/kar/titles/815/008/010/,2026-11-02,1,815 KAR 8:010; KRS 198B.667,Death only,"Kentucky Legislative Research Commission, 815 KAR 8:010, accessed 2026-11-02"
84,Days to notify the department of the master HVAC contractor's death,10,days,Kentucky,current,815 KAR 8:010,Kentucky Legislative Research Commission,https://apps.legislature.ky.gov/law/kar/titles/815/008/010/,2026-11-02,1,815 KAR 8:010,As stated in the official text,"Kentucky Legislative Research Commission, 815 KAR 8:010, accessed 2026-11-02"
85,Initial master HVAC contractor license fee (12 months),250,USD,Kentucky,current,815 KAR 8:010,Kentucky Legislative Research Commission,https://apps.legislature.ky.gov/law/kar/titles/815/008/010/,2026-11-02,1,815 KAR 8:010,As stated in the official text,"Kentucky Legislative Research Commission, 815 KAR 8:010, accessed 2026-11-02"
86,Master HVAC contractor examination fee,150,USD,Kentucky,current,815 KAR 8:010,Kentucky Legislative Research Commission,https://apps.legislature.ky.gov/law/kar/titles/815/008/010/,2026-11-02,1,815 KAR 8:010,As stated in the official text,"Kentucky Legislative Research Commission, 815 KAR 8:010, accessed 2026-11-02"
87,Job value above which an HVAC license is required,10000,USD,Louisiana,released 2025-08-08,"Heat, Air Conditioning, Ventilation, Duct Work, and Refrigeration classification",Louisiana State Licensing Board for Contractors,https://lslbc.gov/classifications_list/heat-air-conditioning-ventilation-duct-work-and-refrigeration/,2026-11-02,1,LSLBC classification page,As stated in the official text,"Louisiana State Licensing Board for Contractors, Heat, Air Conditioning, Ventilation, Duct Work, and Refrigeration classification, accessed 2026-11-02"
88,Active experience for master HVACR contractor,3,years,Maryland,current,"Md. Code, Business Regulation 9A-301 and 9A-302",Maryland General Assembly,https://mgaleg.maryland.gov/mgawebsite/Laws/StatuteText?article=gbr&section=9A-302&enactments=false,2026-11-02,1,Bus. Reg. 9A-302(b),"Plus 1,875 hours in prior year","Maryland General Assembly, Md. Code, Business Regulation 9A-301 and 9A-302, accessed 2026-11-02"
89,"Hours worked in the year before applying, master HVACR",1875,hours,Maryland,current,"Md. Code, Business Regulation 9A-301 and 9A-302",Maryland General Assembly,https://mgaleg.maryland.gov/mgawebsite/Laws/StatuteText?article=gbr&section=9A-302&enactments=false,2026-11-02,1,Bus. Reg. 9A-302(b),As stated in the official text,"Maryland General Assembly, Md. Code, Business Regulation 9A-301 and 9A-302, accessed 2026-11-02"
90,Experience for mechanical work classification exam,3,years,Michigan,current,"Skilled Trades Regulation Act, Act 407 of 2016, Article 8 (Internet Archive copy of the official page; direct request timed out or was blocked from our network)",Michigan Legislature,https://renderpdf.legislature.mi.gov/documents/mcl/pdf/mcl-407-2016-8.pdf,2026-11-02,1,MCL 339.5807(1)(a),"Or 6,000 hours","Michigan Legislature, Skilled Trades Regulation Act, Act 407 of 2016, Article 8 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
91,Experience hours alternative,6000,hours,Michigan,current,"Skilled Trades Regulation Act, Act 407 of 2016, Article 8 (Internet Archive copy of the official page; direct request timed out or was blocked from our network)",Michigan Legislature,https://renderpdf.legislature.mi.gov/documents/mcl/pdf/mcl-407-2016-8.pdf,2026-11-02,1,MCL 339.5807(1)(a),As stated in the official text,"Michigan Legislature, Skilled Trades Regulation Act, Act 407 of 2016, Article 8 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
92,Days to designate a new contractor of record (incl. a buyer after a sale),90,days,Michigan,current,"Skilled Trades Regulation Act, Act 407 of 2016, Article 8 (Internet Archive copy of the official page; direct request timed out or was blocked from our network)",Michigan Legislature,https://renderpdf.legislature.mi.gov/documents/mcl/pdf/mcl-407-2016-8.pdf,2026-11-02,1,"MCL 339.5815(1),(2)",As stated in the official text,"Michigan Legislature, Skilled Trades Regulation Act, Act 407 of 2016, Article 8 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
93,Days to notify the board when the qualifying person leaves,10,days,Nevada,current,NRS ch. 624 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Nevada Legislature,https://www.leg.state.nv.us/NRS/NRS-624.html,2026-11-02,1,NRS 624.285(1),As stated in the official text,"Nevada Legislature, NRS ch. 624 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
94,Maximum days the license stays in force pending replacement,30,days,Nevada,current,NRS ch. 624 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Nevada Legislature,https://www.leg.state.nv.us/NRS/NRS-624.html,2026-11-02,1,NRS 624.285(1),Board may extend for good cause,"Nevada Legislature, NRS ch. 624 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
95,Minimum ownership of a bona fide representative,1,percent,New Jersey,2018 law,"P.L.2018, c.125 (amending N.J.S.A. 45:16A-2) (Internet Archive copy of the official page; direct request timed out or was blocked from our network)","New Jersey Legislature (chaptered law, Rutgers Law Library copy)",https://njlaw.rutgers.edu/collections/njleg/2018/2018-125.pdf,2026-11-02,1,N.J.S.A. 45:16A-2 as amended,Also 1 percent of net sale proceeds,"New Jersey Legislature (chaptered law, Rutgers Law Library copy), P.L.2018, c.125 (amending N.J.S.A. 45:16A-2) (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
96,Experience for MM-3 HVAC classification,4,years,New Mexico,current,"14.6.6 NMAC, Classifications",New Mexico State Records Center and Archives,https://www.srca.nm.gov/parts/title14/14.006.0006.html,2026-11-02,1,14.6.6 NMAC,As stated in the official text,"New Mexico State Records Center and Archives, 14.6.6 NMAC, Classifications, accessed 2026-11-02"
97,"Maximum annual license fee, plumbing or heating contractor",150,USD,North Carolina,current,"N.C. Gen. Stat. ch. 87, art. 2 (Internet Archive copy of the official page; direct request timed out or was blocked from our network)",North Carolina General Assembly,https://www.ncleg.gov/EnactedLegislation/Statutes/HTML/ByArticle/Chapter_87/Article_2.html,2026-11-02,1,G.S. 87-22,"Cap, not actual fee","North Carolina General Assembly, N.C. Gen. Stat. ch. 87, art. 2 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
98,Maximum experience the board may require before the exam,2,years,North Carolina,current,"N.C. Gen. Stat. ch. 87, art. 2 (Internet Archive copy of the official page; direct request timed out or was blocked from our network)",North Carolina General Assembly,https://www.ncleg.gov/EnactedLegislation/Statutes/HTML/ByArticle/Chapter_87/Article_2.html,2026-11-02,1,G.S. 87-21,As stated in the official text,"North Carolina General Assembly, N.C. Gen. Stat. ch. 87, art. 2 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
99,Years as a tradesperson required to sit for the contractor exam,5,years,Ohio,current,Ohio Rev. Code 4740.06 and 4740.07 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Ohio Legislative Service Commission,https://codes.ohio.gov/ohio-revised-code/section-4740.07,2026-11-02,1,R.C. 4740.06(B)(3),As stated in the official text,"Ohio Legislative Service Commission, Ohio Rev. Code 4740.06 and 4740.07 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
100,Days after death or change of company form when a license assignment becomes invalid,90,days,Ohio,current,Ohio Rev. Code 4740.06 and 4740.07 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Ohio Legislative Service Commission,https://codes.ohio.gov/ohio-revised-code/section-4740.07,2026-11-02,1,R.C. 4740.07,As stated in the official text,"Ohio Legislative Service Commission, Ohio Rev. Code 4740.06 and 4740.07 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
101,Surety bond for an active mechanical contractor,5000,USD,Oklahoma,form rev. 2022,Mechanical license application,Oklahoma Construction Industries Board,https://oklahoma.gov/content/dam/ok/en/cib/documents/your-industry/mechanical-industry/mechanical_application_with_approved_schools_for_website_11-15-22.pdf,2026-11-02,1,CIB application,As stated in the official text,"Oklahoma Construction Industries Board, Mechanical license application, accessed 2026-11-02"
102,Commercial general liability minimum,50000,USD,Oklahoma,form rev. 2022,Mechanical license application,Oklahoma Construction Industries Board,https://oklahoma.gov/content/dam/ok/en/cib/documents/your-industry/mechanical-industry/mechanical_application_with_approved_schools_for_website_11-15-22.pdf,2026-11-02,1,CIB application,As stated in the official text,"Oklahoma Construction Industries Board, Mechanical license application, accessed 2026-11-02"
103,Mechanical contractor license plus application fee,330,USD,Oklahoma,form rev. 2022,Mechanical license application,Oklahoma Construction Industries Board,https://oklahoma.gov/content/dam/ok/en/cib/documents/your-industry/mechanical-industry/mechanical_application_with_approved_schools_for_website_11-15-22.pdf,2026-11-02,1,CIB application ($300 + $30),As stated in the official text,"Oklahoma Construction Industries Board, Mechanical license application, accessed 2026-11-02"
104,Experience for contractor license (journeyman 3 years plus 1),4,years,Oklahoma,form rev. 2022,Mechanical license application,Oklahoma Construction Industries Board,https://oklahoma.gov/content/dam/ok/en/cib/documents/your-industry/mechanical-industry/mechanical_application_with_approved_schools_for_website_11-15-22.pdf,2026-11-02,1,CIB application,As stated in the official text,"Oklahoma Construction Industries Board, Mechanical license application, accessed 2026-11-02"
105,Mechanical contracting job value above which a state license is required,10000,USD,South Carolina,effective 2023-05-19,S.C. Code tit. 40 ch. 11,South Carolina Legislature,https://www.scstatehouse.gov/code/t40c011.php,2026-11-02,1,S.C. Code 40-11-30; 2023 Act 69,"Was 5,000 before 2023","South Carolina Legislature, S.C. Code tit. 40 ch. 11, accessed 2026-11-02"
106,Prior threshold before 2023 Act 69,5000,USD,South Carolina,before 2023-05-19,S.C. Code tit. 40 ch. 11,South Carolina Legislature,https://www.scstatehouse.gov/code/t40c011.php,2026-11-02,1,Same section history,As stated in the official text,"South Carolina Legislature, S.C. Code tit. 40 ch. 11, accessed 2026-11-02"
107,Days to notify after the primary qualifying party disassociates,15,days,South Carolina,current,S.C. Code tit. 40 ch. 11,South Carolina Legislature,https://www.scstatehouse.gov/code/t40c011.php,2026-11-02,1,Ch. 11,As stated in the official text,"South Carolina Legislature, S.C. Code tit. 40 ch. 11, accessed 2026-11-02"
108,Days the license stays in good standing pending a new qualifying party,90,days,South Carolina,current,S.C. Code tit. 40 ch. 11,South Carolina Legislature,https://www.scstatehouse.gov/code/t40c011.php,2026-11-02,1,Ch. 11,As stated in the official text,"South Carolina Legislature, S.C. Code tit. 40 ch. 11, accessed 2026-11-02"
109,Subcontract value at which HVAC work requires a state license,25000,USD,Tennessee,rev. November 2025,Tenn. Comp. R. & Regs. ch. 0680-01 (rev. November 2025) (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Tennessee Secretary of State,https://publications.tnsosfiles.com/rules/0680/0680-01.20251118.pdf,2026-11-02,1,Rule 0680-01 citing T.C.A. 62-6-102,As stated in the official text,"Tennessee Secretary of State, Tenn. Comp. R. & Regs. ch. 0680-01 (rev. November 2025) (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
110,Time to appoint a new qualifying agent,90,days (three months),Tennessee,rev. November 2025,Tenn. Comp. R. & Regs. ch. 0680-01 (rev. November 2025) (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Tennessee Secretary of State,https://publications.tnsosfiles.com/rules/0680/0680-01.20251118.pdf,2026-11-02,1,Rule 0680-01-.02; three months coded as 90 days,Approximation of three months,"Tennessee Secretary of State, Tenn. Comp. R. & Regs. ch. 0680-01 (rev. November 2025) (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
111,"Practical experience required, contractor license (in the preceding 72 months)",48,months,Texas,2024 snapshot,Tex. Occ. Code ch. 1302 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Texas Legislature,https://statutes.capitol.texas.gov/Docs/OC/htm/OC.1302.htm,2026-11-02,1,Occ. Code 1302.255(a)(2)(A),As stated in the official text,"Texas Legislature, Tex. Occ. Code ch. 1302 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
112,Look-back window for experience,72,months,Texas,2024 snapshot,Tex. Occ. Code ch. 1302 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Texas Legislature,https://statutes.capitol.texas.gov/Docs/OC/htm/OC.1302.htm,2026-11-02,1,Occ. Code 1302.255,As stated in the official text,"Texas Legislature, Tex. Occ. Code ch. 1302 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
113,Alternative experience with 12 months of technician certification,36,months,Texas,2024 snapshot,Tex. Occ. Code ch. 1302 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Texas Legislature,https://statutes.capitol.texas.gov/Docs/OC/htm/OC.1302.htm,2026-11-02,1,Occ. Code 1302.255(a)(2)(B),As stated in the official text,"Texas Legislature, Tex. Occ. Code ch. 1302 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
114,"Class B capacity limit, cooling",25,tons,Texas,2024 snapshot,Tex. Occ. Code ch. 1302 (Internet Archive copy of the official page; direct request timed out or was blocked from our network),Texas Legislature,https://statutes.capitol.texas.gov/Docs/OC/htm/OC.1302.htm,2026-11-02,1,Occ. Code 1302.253(c),As stated in the official text,"Texas Legislature, Tex. Occ. Code ch. 1302 (Internet Archive copy of the official page; direct request timed out or was blocked from our network), accessed 2026-11-02"
115,Days to notify after a qualifier ceases association,10,days,Utah,current,Utah Code 58-55-304 and ch. 55 pt. 3,Utah Legislature,https://le.utah.gov/xcode/Title58/Chapter55/C58-55-S304_1800010118000101.pdf,2026-11-02,1,Utah Code 58-55-304,As stated in the official text,"Utah Legislature, Utah Code 58-55-304 and ch. 55 pt. 3, accessed 2026-11-02"
116,Days the license remains in force pending a new qualifier,60,days,Utah,current,Utah Code 58-55-304 and ch. 55 pt. 3,Utah Legislature,https://le.utah.gov/xcode/Title58/Chapter55/C58-55-S304_1800010118000101.pdf,2026-11-02,1,Utah Code 58-55-304,Recodified to 58-55-105 on 2027-01-01,"Utah Legislature, Utah Code 58-55-304 and ch. 55 pt. 3, accessed 2026-11-02"
117,Experience for a Class C qualified individual,1,year,Virginia,current,"18VAC50-22, Board for Contractors regulations",Virginia Legislative Information System,https://law.lis.virginia.gov/admincodefull/title18/agency50/chapter22/,2026-11-02,1,18VAC50-22-40(B),As stated in the official text,"Virginia Legislative Information System, 18VAC50-22, Board for Contractors regulations, accessed 2026-11-02"
118,Class C initial license fee,235,USD,Virginia,current,"18VAC50-22, Board for Contractors regulations",Virginia Legislative Information System,https://law.lis.virginia.gov/admincodefull/title18/agency50/chapter22/,2026-11-02,1,18VAC50-22-100,As stated in the official text,"Virginia Legislative Information System, 18VAC50-22, Board for Contractors regulations, accessed 2026-11-02"
119,Class B initial license fee,380,USD,Virginia,current,"18VAC50-22, Board for Contractors regulations",Virginia Legislative Information System,https://law.lis.virginia.gov/admincodefull/title18/agency50/chapter22/,2026-11-02,1,18VAC50-22-100,As stated in the official text,"Virginia Legislative Information System, 18VAC50-22, Board for Contractors regulations, accessed 2026-11-02"
120,Class A initial license fee,400,USD,Virginia,current,"18VAC50-22, Board for Contractors regulations",Virginia Legislative Information System,https://law.lis.virginia.gov/admincodefull/title18/agency50/chapter22/,2026-11-02,1,18VAC50-22-100,As stated in the official text,"Virginia Legislative Information System, 18VAC50-22, Board for Contractors regulations, accessed 2026-11-02"
121,Fee to change the qualified individual,125,USD,Virginia,current,"18VAC50-22, Board for Contractors regulations",Virginia Legislative Information System,https://law.lis.virginia.gov/admincodefull/title18/agency50/chapter22/,2026-11-02,1,18VAC50-22-100,As stated in the official text,"Virginia Legislative Information System, 18VAC50-22, Board for Contractors regulations, accessed 2026-11-02"
122,Days to report a change of qualified individual,60,days,Virginia,current,"18VAC50-22, Board for Contractors regulations",Virginia Legislative Information System,https://law.lis.virginia.gov/admincodefull/title18/agency50/chapter22/,2026-11-02,1,18VAC50-22-220(C),Reporting deadline,"Virginia Legislative Information System, 18VAC50-22, Board for Contractors regulations, accessed 2026-11-02"
123,Days to report a change of designated employee,120,days,Virginia,current,"18VAC50-22, Board for Contractors regulations",Virginia Legislative Information System,https://law.lis.virginia.gov/admincodefull/title18/agency50/chapter22/,2026-11-02,1,18VAC50-22-220(B),As stated in the official text,"Virginia Legislative Information System, 18VAC50-22, Board for Contractors regulations, accessed 2026-11-02"
124,"EPA 608 technician certification types for stationary equipment (Type I, II and III)",3,types,United States,as of 2026-10-01,"40 CFR 82.161, Technician certification","eCFR, Office of the Federal Register",https://www.ecfr.gov/api/versioner/v1/full/2026-10-01/title-40.xml?part=82&section=82.161,2026-11-02,1,40 CFR 82.161(a),"Federal refrigerant handling, not a contractor license","eCFR, Office of the Federal Register, 40 CFR 82.161, Technician certification, accessed 2026-11-02"