Get licensed. Stay licensed.
Every code, certification, license, and insurance requirement that governs the trades — in one place. The same requirement can matter to you two ways: as a credential for your career, and as something your company needs to operate. Filter by your trade, your level, and which lens you're looking through.Licensing by trade + state · expanding
Certifications that move you up
The cards, certs, and licenses that get you hired and take you from apprentice to journeyman to master — EPA 608, OSHA 10/30, NABCEP, and the licensing your trade requires.
Show career credentials →What it takes to operate legally
The licensing, insurance, and compliance you need to stand up and run a shop — contractor and business licenses, general liability, workers' comp, bonding, and the codes you're inspected against.
Show company requirements →See what's relevant to you. Add your trade, level, and the certs you already hold to your Trade Card — we'll surface the credentials and training that matter for where you are and where you're headed.
Build your Trade Card →EPA Section 608
EPA 608Federal regulation requiring certification for technicians who handle refrigerants in HVAC systems.
LEED
LEEDThe most widely used green building rating system, certifying the design, construction, and operation of high-performance buildings.
ENERGY STAR
ENERGY STARGovernment-backed program certifying energy-efficient products, homes, and buildings.
RESNET HERS Index
HERSThe industry-standard score for residential energy efficiency, governed by RESNET.
BPI Certification
BPIProfessional certifications for home energy auditing and building-performance contracting.
ASHRAE Standards
ASHRAETechnical standards for HVAC&R design, energy efficiency, and indoor air quality, widely adopted by building codes.
International Residential Code
IRCThe International Residential Code (IRC) is a model code published by the International Code Council (ICC) that establishes minimum requirements for one- and two-family dwellings and townhouses up to three stories. It is a comprehensive, stand-alone code combining building, plumbing, mechanical, fuel gas, energy conservation, and electrical provisions for residential construction.
International Mechanical Code
IMCThe International Mechanical Code (IMC) is a model code published by the International Code Council that establishes minimum requirements for mechanical systems using prescriptive and performance-related provisions. It governs the design, installation, and safety of HVAC, ventilation, exhaust, and refrigeration systems in buildings.
OSHA 10/30-Hour
OSHA 10/30The OSHA Outreach Training Program offers voluntary 10-hour and 30-hour courses that teach workers to recognize, avoid, abate, and prevent common job-related safety and health hazards. The 10-hour course targets entry-level workers, while the 30-hour course is intended for supervisors and workers with some safety responsibility.
PHCC
PHCCThe Plumbing-Heating-Cooling Contractors—National Association (PHCC) is a U.S. trade association founded in 1883 that represents plumbing and HVACR contractors through advocacy, education, and training. It serves approximately 3,300 member businesses and 65,000 technicians via a network of affiliated state and local chapters.
ACCA
ACCAThe Air Conditioning Contractors of America (ACCA) is the national trade association representing HVACR contracting businesses and professionals across the United States. It develops ANSI-approved quality standards for the design, installation, maintenance, and verification of HVAC systems, including the widely used Manual J, Manual D, and Manual S.
MCAA
MCAAThe Mechanical Contractors Association of America (MCAA) is a national trade association representing more than 3,000 firms in the heating, air conditioning, refrigeration, plumbing, piping, mechanical systems, and HVACR service industries. It provides its member contractors with education, training, labor-management resources, and industry tools.
SMACNA
SMACNASMACNA is an international trade association representing sheet metal and HVAC duct contracting firms, best known for developing widely referenced technical standards such as the HVAC Duct Construction Standards. It provides its members with education, technical standards development, labor relations, and industry advocacy.
Weatherization Assistance Program workforce certifications (BPI/AEE HEP, QCI)
WAPHQWeatherization Assistance Program workforce certifications (BPI/AEE HEP, QCI), issued by US DOE WAP; state weatherization agencies (energy). WAP Energy Auditor and Quality Control Inspector must hold DOE-recognised (HEP) certifications; EA recertification 30 CEUs over 5-year cycle, QCI 6 CEUs (WAP Memo 126).
BPI credentials used for HOMES/HEAR and WAP (Building Analyst, Building Science Principles, HEP)
BHWABSBPI credentials used for HOMES/HEAR and WAP (Building Analyst, Building Science Principles, HEP), issued by Building Performance Institute (BPI) (energy). Cited by state programmes: GA, MI, WI, OR, WA, NC (reported), NY (reported).
BPI Building Analyst Professional (BA-P) and related BPI certifications
BA-PBPI Building Analyst Professional (BA-P) and related BPI certifications, issued by Building Performance Institute (BPI) (energy).
BPI GoldStar Contractor
BGCBPI GoldStar Contractor, issued by Building Performance Institute (BPI) (energy).
RESNET Certified HERS Rater
RCHRRESNET Certified HERS Rater, issued by RESNET (energy).
DOE Zero Energy Ready Home (Builder Partner + Rater/Verifier)
DZERHPDOE Zero Energy Ready Home (Builder Partner + Rater/Verifier), issued by US DOE (energy).
EPA Indoor airPLUS (Version 2, Gold)
EI2GEPA Indoor airPLUS (Version 2, Gold), issued by US EPA (smoke, energy).
NATE HVAC certification (Ready-to-Work, Core + Specialty)
NHCSNATE HVAC certification (Ready-to-Work, Core + Specialty), issued by NATE (energy).
ASHRAE Guideline 44-2024 (wildfire smoke): standard, not a credential
AG4ASHRAE Guideline 44-2024 (wildfire smoke): standard, not a credential, issued by ASHRAE (smoke).
Alabama residential energy code
AL-ECResidential energy code in Alabama: 2015 IECC-based Alabama Residential Energy Code. In force since 2016-10-01. Statewide code, enforced by local governments.
Alaska residential energy code
AK-ECResidential energy code in Alaska: 2018 IECC with ASHRAE 62.2-2016 (Alaska BEES, tied to AHFC financing; no mandatory statewide code). Home rule: no mandatory statewide residential energy code; local governments adopt their own.
Arizona residential energy code
AZ-ECResidential energy code in Arizona: No statewide residential energy code. Home rule: no mandatory statewide residential energy code; local governments adopt their own.
Arkansas residential energy code
AR-ECResidential energy code in Arkansas: 2009 IECC with Arkansas amendments (2014 Arkansas Energy Code). In force since 2015-01-01. Statewide code, enforced by local governments.
California residential energy code
CA-ECResidential energy code in California: Title 24 Part 6, 2025 Energy Code. In force since 2026-01-01. Statewide mandatory code.
Colorado residential energy code
CO-ECResidential energy code in Colorado: No single statewide residential code; local governments adopt. Home rule: no mandatory statewide residential energy code; local governments adopt their own.
Connecticut residential energy code
CT-ECResidential energy code in Connecticut: 2021 IECC (2022 Connecticut State Building Code). In force since 2022-10-01. Statewide mandatory code.
Delaware residential energy code
DE-ECResidential energy code in Delaware: 2024 IECC with Delaware amendments (adopted April 2026). In force since April 2026. Statewide code, enforced by local governments.
District of Columbia residential energy code
DC-ECResidential energy code in District of Columbia: 2015 IECC base (DC Energy Conservation Code). In force since 2020-05-29. Statewide mandatory code.
Florida residential energy code
FL-ECResidential energy code in Florida: Florida Building Code, Energy Conservation, 8th Edition (2023; 2021 IECC base). In force since 2023-12-31. Statewide mandatory code.
Georgia residential energy code
GA-ECResidential energy code in Georgia: 2015 IECC with Georgia amendments. In force since 2020-01-01. Statewide code, enforced by local governments.
Hawaii residential energy code
HI-ECResidential energy code in Hawaii: State energy conservation code; counties adopt and enforce (IECC edition not confirmed). Statewide code, enforced by local governments.
Idaho residential energy code
ID-ECResidential energy code in Idaho: 2018 IECC with Idaho amendments. In force since 2021-01-01. Statewide mandatory code.
Illinois residential energy code
IL-ECResidential energy code in Illinois: 2024 IECC as amended by Illinois. In force since 2025-11-30. Statewide mandatory code.
Indiana residential energy code
IN-ECResidential energy code in Indiana: Indiana Residential Code (2018 IRC-based); IECC edition not confirmed.
Iowa residential energy code
IA-ECResidential energy code in Iowa: 2012 IECC with Iowa amendments (481 IAC 301.24). In force since 2014-03-12 (carried forward by the 2025-09-10 consolidation). Statewide mandatory code.
Kansas residential energy code
KS-ECResidential energy code in Kansas: No statewide residential energy code. Home rule: no mandatory statewide residential energy code; local governments adopt their own.
Kentucky residential energy code
KY-ECResidential energy code in Kentucky: 2009 IECC per the Kentucky Residential Code (2018 KRC, 2nd edition; 3rd edition text not read). In force since 2024-12-03 (rule 815 KAR 7:125 amendment). Statewide code, enforced by local governments.
Louisiana residential energy code
LA-ECResidential energy code in Louisiana: 2021 IECC with state amendments. In force since 2023-07-01. Statewide code, enforced by local governments.
Maine residential energy code
ME-ECResidential energy code in Maine: 2021 IECC (Maine Uniform Building and Energy Code). In force since 2025-04-07. Statewide minimum; local governments may adopt stricter.
Maryland residential energy code
MD-ECResidential energy code in Maryland: 2021 IECC with Maryland amendments. In force since 2023-05-29. Statewide code, enforced by local governments.
Massachusetts residential energy code
MA-ECResidential energy code in Massachusetts: 2021 IECC with Massachusetts amendments (780 CMR chapter 11R, 10th edition). In force since 2024-10-11. Statewide mandatory code.
Michigan residential energy code
MI-ECResidential energy code in Michigan: 2015 IECC per DOE; a 2021 rule set is reported stayed by court order.
Minnesota residential energy code
MN-ECResidential energy code in Minnesota: 2012 IECC residential provisions with Minnesota amendments (Minn. R. ch. 1322). In force since 2015-02-14. Statewide mandatory code.
Mississippi residential energy code
MS-ECResidential energy code in Mississippi: No statewide residential energy code per DOE; sources conflict.
Missouri residential energy code
MO-ECResidential energy code in Missouri: No statewide residential energy code; local adoption (DOE lists a 2015 IECC equivalent). Home rule: no mandatory statewide residential energy code; local governments adopt their own.
Montana residential energy code
MT-ECResidential energy code in Montana: 2021 IECC with Montana amendments. In force since 2022-06-10. Statewide mandatory code.
Nebraska residential energy code
NE-ECResidential energy code in Nebraska: 2018 IECC (Nebraska Energy Code). In force since 2020-07-01. Statewide mandatory code.
Nevada residential energy code
NV-ECResidential energy code in Nevada: 2024 IECC (NAC 701.185, by reference). In force since 2024-08-18. Statewide minimum; local governments may adopt stricter.
New Hampshire residential energy code
NH-ECResidential energy code in New Hampshire: 2018 IECC (RSA 155-A:1). Statewide code, enforced by local governments.
New Jersey residential energy code
NJ-ECResidential energy code in New Jersey: 2024 IECC residential with New Jersey amendments (N.J.A.C. 5:23-3.18). In force since 2026-08-17. Statewide code, enforced by local governments.
New Mexico residential energy code
NM-ECResidential energy code in New Mexico: 2021 IECC as amended (14.7.6 NMAC). In force since 2024-01-30. Statewide mandatory code.
New York residential energy code
NY-ECResidential energy code in New York: 2025 Energy Conservation Construction Code of New York State (2024 IECC-based). In force since 2025-12-31. Statewide code, enforced by local governments.
North Carolina residential energy code
NC-ECResidential energy code in North Carolina: 2018 North Carolina Energy Conservation Code. In force since 2019-01-01. Statewide code, enforced by local governments.
North Dakota residential energy code
ND-ECResidential energy code in North Dakota: 2024 IECC (2026 North Dakota State Building Code). In force since 2026-01-01. Home rule: no mandatory statewide residential energy code; local governments adopt their own.
Ohio residential energy code
OH-ECResidential energy code in Ohio: Residential Code of Ohio chapter 11 (IECC 2018-based, with Ohio amendments). In force since 2019-07-01. Statewide mandatory code.
Oklahoma residential energy code
OK-ECResidential energy code in Oklahoma: 2024 IRC chapter 11 as amended (OAC 748:20-6-16). In force since 2026-09-14. Statewide mandatory code.
Oregon residential energy code
OR-ECResidential energy code in Oregon: 2026 Oregon Residential Specialty Code (energy provisions in chapter 11). In force since 2026-10-01 (mandatory from 2027-04-01). Statewide mandatory code.
Pennsylvania residential energy code
PA-ECResidential energy code in Pennsylvania: 2021 IECC (34 Pa. Code 403.21). In force since 2026-01-01. Statewide mandatory code.
Rhode Island residential energy code
RI-ECResidential energy code in Rhode Island: 2024 IECC (RISBC-8). In force since 2025-12-01. Statewide mandatory code.
South Carolina residential energy code
SC-ECResidential energy code in South Carolina: 2009 IECC (S.C. Code 6-10-30). In force since 2013-01-01. Statewide mandatory code.
South Dakota residential energy code
SD-ECResidential energy code in South Dakota: No mandatory statewide code; 2009 IECC named as a voluntary standard (SDCL 11-10-7). Home rule: no mandatory statewide residential energy code; local governments adopt their own.
Tennessee residential energy code
TN-ECResidential energy code in Tennessee: 2018 IECC with Tennessee exceptions (Tenn. Comp. R. 0780-02-23). In force since 2020-07-16 (last amendment).
Texas residential energy code
TX-ECResidential energy code in Texas: 2015 IRC chapter 11 / 2015 IECC as the state minimum. In force since 2016-09-01. Statewide code, enforced by local governments.
Utah residential energy code
UT-ECResidential energy code in Utah: 2024 IECC from 2026-07-01 (H.B. 65); IRC stays at 2021 with a Utah-replaced chapter 11. In force since 2026-07-01. Statewide mandatory code.
Vermont residential energy code
VT-ECResidential energy code in Vermont: 2020 or 2024 Residential Building Energy Standards (either allowed under the rule effective 2026-07-14). In force since 2026-07-14 (revised rule). Statewide mandatory code.
Virginia residential energy code
VA-ECResidential energy code in Virginia: 2021 Virginia Residential Code (2021 IECC base per a search snippet). In force since 2024-01-18. Statewide mandatory code.
Washington residential energy code
WA-ECResidential energy code in Washington: 2021 Washington State Energy Code, Residential (WAC 51-11R). In force since 2024-03-15. Statewide mandatory code.
West Virginia residential energy code
WV-ECResidential energy code in West Virginia: 2015 IECC per DOE (87 CSR 4); a state text naming the edition was not opened. In force since 2022-08-01. Statewide mandatory code.
Wisconsin residential energy code
WI-ECResidential energy code in Wisconsin: 2009 IECC-based Uniform Dwelling Code (SPS 322). In force since 2016-01-01. Statewide mandatory code.
Wyoming residential energy code
WY-ECResidential energy code in Wyoming: No mandatory statewide code per DOE (home rule); no state source opened. Home rule: no mandatory statewide residential energy code; local governments adopt their own.
California Green Building Standards Code (CALGreen)
CALGreenCalifornia Green Building Standards Code (CALGreen), Title 24 Part 11, 2025 edition: statewide mandatory green-building measures for new buildings, in force since 2026-01-01.
Massachusetts Stretch and Specialized Opt-in energy codes
MA-STRETCHMassachusetts' optional Stretch Energy Code and Specialized Opt-in Code, adopted by municipalities on top of the statewide base energy code.
NGBS Green Certification (ICC 700)
NGBSICC 700 is the National Green Building Standard for homes and residential buildings. Home Innovation Research Labs certifies projects to it at the Bronze, Silver, Gold or Emerald level.
NGBS Green Verifier
NGBS-GVIndividual accreditation from Home Innovation Research Labs that allows a person to register NGBS projects and verify them on site. It is held by individuals, not companies.
Green Globes
GGGreen Globes is Green Building Initiative's green-building rating program for commercial and multifamily projects, with assessor-led review. GBI's pages describe commercial real estate and multifamily protocols and do not mention single-family homes.
Enterprise Green Communities Criteria
EGCGreen-building criteria for affordable housing from Enterprise Community Partners, covering energy, health and resilience, with Certification, Certification Plus and Certification Plus Zero Emissions tiers.
PHI Certified Passive House Tradesperson
CPHTPassive House Institute certificate for construction trades on building to the Passive House standard, awarded by passing a 120-minute exam through an accredited provider, in class or online.