State,Code,State license scope,License,Holder,Experience,Exam,Bond or insurance,Fee,Reciprocity,Qualifier deadline (days),Deadline note,Citation,Official text URL,Date checked,Confidence,CBP 2023 NAICS 238220 establishments
Alabama,AL,statewide,"Certified heating and air conditioning contractor (Board of Heating, Air Conditioning and Refrigeration Contractors)",individual,n.c.,yes,"$20,000 performance bond",$220 initial certification; $175 written exam (fees effective 2024-10-14),"Yes, with qualifying reciprocal states",0,Entity must notify within 5 days and immediately stop contracting until a new certified contractor is approved; 90-day emergency certification only after death or incapacity,Ala. Admin. Code r. 440-X-3; Code of Ala. 1975 s. 34-31-28,https://admincode.legislature.state.al.us/api/chapter/440-X-3,2026-11-02,clear text,1647
Alaska,AK,statewide,Mechanical administrator license (required for registered mechanical contractors),individual,n.c.,yes,n.c.,Set by department regulation (AS 08.40.310),Exam may be waived for administrators licensed in another state who meet department qualifications,,Statute limits an administrator to one contractor (AS 08.40.280); replacement window not found in the text opened,Alaska Stat. 08.40.260 to 08.40.300,https://WWW.COMMERCE.ALASKA.GOV/web/Portals/5/pub/MechStatutes.pdf,2026-11-02,interpretation needed,264
Arizona,AZ,statewide,Registrar of Contractors license (C-39 air conditioning and refrigeration and related classes),entity-qualifier,n.c.,n.c.,Surety bond scaled to annual volume (A.R.S. 32-1152),n.c.,n.c.,60,Licensee and qualifying party notify within 15 days; licensee must requalify within 60 days or the license is suspended,A.R.S. 32-1127.01; A.R.S. 32-1152,https://www.azleg.gov/ars/32/01127-01.htm,2026-11-02,clear text,2567
Arkansas,AR,statewide,"HVACR license Class A to E (HVACR Licensing Board, Department of Labor and Licensing)",individual,n.c.,yes,n.c.,Class A $200; Class B $150 (2022 application form),By reciprocal agreement or substantially similar out-of-state license,,Not found in the rule text opened,17 CAR pt. 261 (incl. s. 261-112); HVACR license application (2022),https://labor.arkansas.gov/wp-content/uploads/17CARpt.261.pdf,2026-11-02,clear text,1145
California,CA,statewide,"CSLB C-20 warm-air heating, ventilating and air-conditioning contractor",entity-qualifier,n.c.,yes,"$25,000 contractor bond",$450 application; $200 initial license (individual owner) or $350 (entity),n.c.,90,"Replace qualifier within 90 days of disassociation; one 90-day extension possible for good cause, 180 days maximum","Cal. Bus. & Prof. Code 7068, 7068.2, 7071.6, 7137",https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=BPC&sectionNum=7068.2,2026-11-02,clear text,11686
Colorado,CO,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,Searched state plumbing board page (blocked) and statute indexes; see excluded.md,https://dpo.colorado.gov/Plumbing,2026-11-02,not found,2620
Connecticut,CT,statewide,"Heating, piping and cooling contractor license (Department of Consumer Protection)",individual,n.c.,yes,n.c.,n.c.,"Yes, with jurisdictions whose requirements are substantially similar or higher",,Not found in chapter 393,"Conn. Gen. Stat. ch. 393, ss. 20-330, 20-333, 20-333a",https://www.cga.ct.gov/current/pub/chap_393.htm,2026-11-02,clear text,1318
Delaware,DE,statewide,"Master HVACR licensee (Board of Plumbing, Heating, Ventilation, Air Conditioning and Refrigeration Examiners)",individual,"2 years after a journeyman apprenticeship, or 7 years supervised",yes,n.c.,Set by Division (s. 1824),"Yes, substantially similar states; 7 years of practice if not similar",,Not found in chapter 18,24 Del. C. ss. 1821 to 1824,https://delcode.delaware.gov/title24/c018/sc03/index.html,2026-11-02,clear text,344
District of Columbia,DC,statewide,Master refrigeration and air conditioning mechanic (Board of Industrial Trades),individual,5 consecutive years,yes,n.c.,n.c.,n.c.,,Not found in Part Q,"D.C. Code 47-2853.201, 47-2853.202",https://code.dccouncil.gov/us/dc/council/code/sections/47-2853.202,2026-11-02,clear text,37
Florida,FL,statewide,"Certified air-conditioning contractor Class A, B or C (Construction Industry Licensing Board)",individual,4 years,yes,n.c.,n.c.,n.c.,60,Business organization has 60 days after its only qualifying agent leaves to employ another; may not contract meanwhile except incomplete contracts under a temporary certificate,"Fla. Stat. 489.111, 489.119(3)(a), 489.1195",http://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0400-0499/0489/0489.html,2026-11-02,clear text,9353
Georgia,GA,statewide,Conditioned air contractor Class I or II (Construction Industry Licensing Board),individual,n.c.,yes,n.c.,n.c.,By written agreement with other state boards,0,"If the licensee no longer qualifies the business, it must cease conditioned air contracting until a new licensee qualifies it","Ga. Comp. R. & Regs. 121-3-.05, 121-2-.03; O.C.G.A. 43-14-8 (cited on board form)",https://rules.sos.ga.gov/gac/121-3,2026-11-02,clear text,3101
Hawaii,HI,statewide,C-52 ventilating and air conditioning contractor (Contractors License Board),entity-qualifier,n.c.,n.c.,n.c.,n.c.,n.c.,90,"Entity notifies within 60 days; within 90 days must qualify a new RME or go inactive, or the license is forfeited","Contractors License Board, Maintain Entity RME Requirements (HAR 16-77)",https://cca.hawaii.gov/pvl/boards/contractor/maintain-entity-rme-requirements/,2026-11-02,clear text,403
Idaho,ID,statewide,"HVAC contractor license (HVAC Board, Division of Occupational and Professional Licenses)",n.c.,n.c.,n.c.,n.c.,n.c.,n.c.,,Not coded,"Idaho Code 54-5005 (ch. 50, Installation of HVAC Systems)",https://legislature.idaho.gov/statutesrules/idstat/Title54/T54CH50/SECT54-5005/,2026-11-02,interpretation needed,904
Illinois,IL,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,See excluded.md for searches,https://www.ilga.gov/legislation/ilcs/ilcs.asp,2026-11-02,not found,4070
Indiana,IN,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,See excluded.md for searches,https://www.in.gov/pla/,2026-11-02,not found,2008
Iowa,IA,statewide,Contractor license plus master HVAC-refrigeration or mechanical license (Plumbing and Mechanical Systems Board),entity-qualifier,n.c.,yes,Public liability insurance and surety bond set by board rule (s. 105.19),n.c.,Reciprocal licenses provided for (s. 105.21),,Contractor must hold or employ at least one master licensee; replacement window not found,"Iowa Code ch. 105, ss. 105.18, 105.19, 105.21",https://www.legis.iowa.gov/docs/code/105.pdf,2026-11-02,clear text,1108
Kansas,KS,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,See excluded.md for searches,https://www.ksrevisor.gov/statutes/,2026-11-02,not found,1028
Kentucky,KY,statewide,"Master HVAC contractor (Department of Housing, Buildings and Construction)",individual,n.c.,yes,Insurance required under KRS 198B.668,$250 initial (12 months); $150 exam,n.c.,,"After the death of the master HVAC contractor representing a company, a 180-day interim period applies; no window found for other departures","815 KAR 8:010; KRS 198B.667, 198B.668",https://apps.legislature.ky.gov/law/kar/titles/815/008/010/,2026-11-02,clear text,1379
Louisiana,LA,threshold,"Mechanical: heat, air conditioning, ventilation, duct work and refrigeration subclassification (LSLBC)",entity-qualifier,n.c.,yes,n.c.,n.c.,n.c.,,"License required when the job value exceeds $10,000; qualifying party replacement window not found",LSLBC classification page (release 2025-08-08); La. R.S. 37:2150 et seq.,https://lslbc.gov/classifications_list/heat-air-conditioning-ventilation-duct-work-and-refrigeration/,2026-11-02,clear text,1623
Maine,ME,trade-limited,Fuel technician licensing only (Oil and Solid Fuel Board; propane and natural gas),individual,n.c.,n.c.,n.c.,n.c.,n.c.,,No general HVAC contractor license found,32 M.R.S. ch. 33 (Oil and Solid Fuel Board),https://legislature.maine.gov/statutes/32/title32ch33sec0.html,2026-11-02,interpretation needed,781
Maryland,MD,statewide,Master HVACR contractor (State Board of HVACR Contractors),individual,3 years,yes,n.c.,n.c.,n.c.,,"Not found in ss. 9A-301, 9A-302","Md. Code, Bus. Reg. 9A-301, 9A-302",https://mgaleg.maryland.gov/mgawebsite/Laws/StatuteText?article=gbr&section=9A-302&enactments=false,2026-11-02,clear text,1986
Massachusetts,MA,trade-limited,Refrigeration technician license (Office of Public Safety and Inspections),individual,n.c.,n.c.,n.c.,n.c.,n.c.,,No general HVAC contractor license found,"Mass.gov, Apply for a Refrigeration Technician License",https://www.mass.gov/how-to/apply-for-a-refrigeration-technician-license,2026-11-02,interpretation needed,3069
Michigan,MI,statewide,"Mechanical contractor license, HVAC equipment classification (Skilled Trades Regulation Act, art. 8)",individual,"3 years or 6,000 hours",yes,n.c.,n.c.,n.c.,90,"Business has 90 days to designate a new licensed contractor of record; after a licensed owner sells, the buyer has 90 days","MCL 339.5807, 339.5809, 339.5815",https://renderpdf.legislature.mi.gov/documents/mcl/pdf/mcl-407-2016-8.pdf,2026-11-02,clear text,2661
Minnesota,MN,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,Department of Labor and Industry licensing page returned 404; see excluded.md,https://www.dli.mn.gov/business/get-licenses-and-permits,2026-11-02,not found,1816
Mississippi,MS,threshold,State Board of Contractors commercial and residential licenses (mechanical / HVAC classifications),n.c.,n.c.,n.c.,n.c.,n.c.,n.c.,,Board states commercial and residential contractors must be licensed; dollar thresholds not confirmed in official text opened,Mississippi State Board of Contractors home page; Miss. Code tit. 31 ch. 3,https://www.msboc.us/,2026-11-02,interpretation needed,709
Missouri,MO,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,See excluded.md for searches,https://pr.mo.gov/,2026-11-02,not found,1915
Montana,MT,none-found,No state HVAC contractor license found (construction contractor registration only),n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Registration is not a trade license,"Montana DLI, Montana Contractor registration page",https://erd.dli.mt.gov/work-comp-regulations/montana-contractor/,2026-11-02,not found,712
Nebraska,NE,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,Nebraska DOL contractor registration page timed out; see excluded.md,https://dol.nebraska.gov/conditionsofemployment/contractorregistration,2026-11-02,not found,837
Nevada,NV,statewide,C-21 refrigeration and air conditioning (State Contractors Board),entity-qualifier,n.c.,yes,Set by the board (NRS 624.270),n.c.,n.c.,30,Notify within 10 days; license stays in force up to 30 days; replace within that period unless extended for good cause,"NRS 624.260, 624.285",https://www.leg.state.nv.us/NRS/NRS-624.html,2026-11-02,clear text,909
New Hampshire,NH,none-found,No state HVAC contractor license found (gas fitting licensing not verified),n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Board page blocked and archive copy missing,See excluded.md,https://www.oplc.nh.gov/mechanical-licensing-board,2026-11-02,not found,776
New Jersey,NJ,statewide,Master HVACR contractor; entity licensed through a bona fide representative (Board of Examiners of HVACR Contractors),entity-qualifier,n.c.,yes,n.c.,n.c.,n.c.,,Bona fide representative must own at least 1 percent and be entitled to 1 percent of net proceeds if the business is sold; replacement window not found,"N.J.S.A. 45:16A-2 as amended by P.L.2018, c.125",https://njlaw.rutgers.edu/collections/njleg/2018/2018-125.pdf,2026-11-02,clear text,3454
New Mexico,NM,statewide,MM-3 HVAC or MM-98 mechanical (Construction Industries Division),n.c.,4 years,n.c.,n.c.,n.c.,n.c.,,Not coded,14.6.6 NMAC,https://www.srca.nm.gov/parts/title14/14.006.0006.html,2026-11-02,clear text,691
New York,NY,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply (for example New York City),NY Department of State licensing services list; see excluded.md,https://dos.ny.gov/licensing-services,2026-11-02,not found,7061
North Carolina,NC,statewide,"Heating group 1, 2 or 3 contractor (State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors)",both,Board may require up to 2 years,yes,n.c.,Annual license fee capped at $150,n.c.,,License may issue in a corporate name if an officer or full-time employee holds it; window not found,"N.C. Gen. Stat. 87-21, 87-22, 87-26",https://www.ncleg.gov/EnactedLegislation/Statutes/HTML/ByArticle/Chapter_87/Article_2.html,2026-11-02,clear text,3973
North Dakota,ND,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,Secretary of State contractor page returned 404; see excluded.md,https://www.sos.nd.gov/business/contractor-services/,2026-11-02,not found,336
Ohio,OH,statewide,HVAC contractor (Ohio Construction Industry Licensing Board),individual,5 years,yes,Contractor liability insurance in an amount set by the board,n.c.,n.c.,90,License assignment to the company becomes invalid 90 days after the contractor dies or files a change of company form,"Ohio Rev. Code 4740.06, 4740.07",https://codes.ohio.gov/ohio-revised-code/section-4740.07,2026-11-02,clear text,2970
Oklahoma,OK,statewide,"Mechanical contractor, HVAC category (Construction Industries Board)",individual,4 years (3 as journeyman plus 1),yes,"$5,000 surety bond and $50,000 general liability",$330 ($300 license plus $30 application),n.c.,,Not found,59 O.S. 1850.1 et seq.; OAC 158:50; CIB mechanical application,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,clear text,1592
Oregon,OR,none-found,No HVAC-specific state contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Construction Contractors Board licenses contractors generally; not verified for HVAC,See excluded.md,https://www.oregon.gov/ccb/Pages/index.aspx,2026-11-02,not found,1337
Pennsylvania,PA,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,Attorney General home improvement page blocked; see excluded.md,https://www.attorneygeneral.gov/protect-yourself/home-improvement/,2026-11-02,not found,4154
Rhode Island,RI,statewide,Master refrigeration/air conditioning or master mechanical contractor (Department of Labor and Training),both,n.c.,n.c.,n.c.,n.c.,n.c.,,"Entity needs a licensed master who is an officer or partner, or its own contractor license",R.I. Gen. Laws 28-27-6,https://webserver.rilegislature.gov/Statutes/TITLE28/28-27/28-27-6.htm,2026-11-02,clear text,494
South Carolina,SC,threshold,"Mechanical contractor, air conditioning classification (Contractor's Licensing Board)",entity-qualifier,n.c.,yes,n.c.,n.c.,n.c.,90,"License required above $10,000 (raised from $5,000 by 2023 Act 69); notify within 15 days, replace primary qualifying party within 90 days",S.C. Code 40-11-30 and qualifying party provisions of ch. 11,https://www.scstatehouse.gov/code/t40c011.php,2026-11-02,clear text,1685
South Dakota,SD,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Local licensing may apply,"SD Department of Labor and Regulation A to Z index (lists plumbing licensing, no HVAC entry)",https://dlr.sd.gov/,2026-11-02,not found,401
Tennessee,TN,threshold,CMC mechanical contractor (Board for Licensing Contractors),entity-qualifier,n.c.,yes,n.c.,n.c.,n.c.,90,"License required at $25,000 or more; a new qualifying agent must pass the exam and be appointed within three months (coded as 90 days)",Tenn. Comp. R. & Regs. 0680-01 (rev. November 2025),https://publications.tnsosfiles.com/rules/0680/0680-01.20251118.pdf,2026-11-02,clear text,1899
Texas,TX,statewide,Air conditioning and refrigeration contractor Class A or B (TDLR),individual,"48 months in the last 72, or 36 months with a technician certification",n.c.,Insurance set by commission rule,n.c.,n.c.,,Company must employ a license holder full time in each office; without one at signing and performance it may not collect a fee; no grace period found in the statute,"Tex. Occ. Code 1302.102, 1302.252, 1302.255",https://statutes.capitol.texas.gov/Docs/OC/htm/OC.1302.htm,2026-11-02,clear text,8966
Utah,UT,statewide,S350 HVAC contractor (Division of Professional Licensing),entity-qualifier,n.c.,n.c.,n.c.,n.c.,n.c.,60,Notify within 10 days; license stays in force 60 days; replace qualifier or the license is suspended (moves to 58-55-105 on 2027-01-01),Utah Code 58-55-304,https://le.utah.gov/xcode/Title58/Chapter55/C58-55-S304_1800010118000101.pdf,2026-11-02,clear text,1443
Vermont,VT,trade-limited,"Electrical specialist, refrigeration and air conditioning (Division of Fire Safety)",individual,n.c.,n.c.,n.c.,n.c.,n.c.,,No general HVAC contractor license found,Vermont Division of Fire Safety licensing page,https://firesafety.vermont.gov/licensing,2026-11-02,interpretation needed,303
Virginia,VA,statewide,"Class A, B or C contractor with HVAC specialty (Board for Contractors)",entity-qualifier,1 year (Class C qualified individual),yes,n.c.,$235 Class C; $380 Class B; $400 Class A,n.c.,,Reporting deadline only: a change of qualified individual must be reported within 60 days (designated employee: 120 days); no replacement window stated,"18VAC50-22-40, 18VAC50-22-100, 18VAC50-22-220",https://law.lis.virginia.gov/admincode/title18/agency50/chapter22/section220/,2026-11-02,clear text,2765
Washington,WA,none-found,No HVAC contractor license found (general contractor registration),n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,Registration under RCW 18.27 is not a trade license,RCW 18.27.020,https://app.leg.wa.gov/rcw/default.aspx?cite=18.27.020,2026-11-02,not found,2242
West Virginia,WV,statewide,HVAC technician license (Division of Labor); contractor licensing under ch. 21 art. 11,n.c.,n.c.,n.c.,n.c.,n.c.,n.c.,,Section text not opened; article index only,W. Va. Code 21-16 (article index),https://code.wvlegislature.gov/21-16/,2026-11-02,interpretation needed,406
Wisconsin,WI,statewide,HVAC contractor registration plus individual HVAC qualifier credential (DSPS),n.c.,n.c.,yes,n.c.,n.c.,n.c.,,Link between registration and qualifier not confirmed in text opened,DSPS HVAC Qualifier profession page (ch. SPS 305),https://dsps.wi.gov/Pages/Professions/HVACQualifier/Default.aspx,2026-11-02,interpretation needed,1944
Wyoming,WY,none-found,No state HVAC contractor license found,n.a.,n.a.,n.a.,n.a.,n.a.,n.a.,,State licenses electricians; HVAC licensing is local where it exists,Wyoming State Fire Marshal electrical licensing page,https://wsfm.wyo.gov/electrical-safety/licensing,2026-11-02,not found,315