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The foundational electrical safety code adopted by most US jurisdictions governing electrical wiring and equipment installation.

Federal workplace safety standards specifically for the construction industry covering fall protection, scaffolding, excavation, and more.

Federal regulation requiring certification for technicians who handle refrigerants in HVAC systems.

The most widely used green building rating system, certifying the design, construction, and operation of high-performance buildings.

Government-backed program certifying energy-efficient products, homes, and buildings.

The industry-standard score for residential energy efficiency, governed by RESNET.

Professional certifications for home energy auditing and building-performance contracting.

The leading certification for solar PV, energy storage, and clean-energy installers.

Technical standards for HVAC&R design, energy efficiency, and indoor air quality, widely adopted by building codes.

The 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.

The International Building Code (IBC) is a model building code published by the International Code Council (ICC) that establishes minimum requirements to safeguard public health, safety, and welfare in the built environment. It applies to the design, construction, and occupancy of most buildings except detached one- and two-family dwellings and townhouses, which are covered by the IRC.

The International Plumbing Code (IPC) is a model code published by the International Code Council (ICC) that establishes minimum requirements for plumbing systems using prescriptive and performance-related provisions. It sets standards for the design, installation, and inspection of plumbing systems to protect public health, sanitation, and safety.

The 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.

The Uniform Plumbing Code (UPC) is a model plumbing code developed and published by IAPMO that sets minimum requirements for the design, installation, and inspection of plumbing systems to protect public health and safety. It is developed through an ANSI-accredited consensus process and is the only U.S. plumbing code designated as an American National Standard.

NFPA 1 (Fire Code) and NFPA 101 (Life Safety Code) are model codes published by the National Fire Protection Association that set requirements for fire prevention, hazard management, and life safety in buildings and structures. They are widely adopted by state and local jurisdictions across the United States and reference more than 130 other NFPA codes and standards.

The 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.

A federal EPA regulation requiring firms and individual renovators to be certified and to follow lead-safe work practices when performing renovation, repair, or painting that disturbs painted surfaces in homes, childcare facilities, and preschools built before 1978. The rule aims to minimize exposure to hazardous lead-based paint dust and reduce childhood lead poisoning.

Federal regulations administered by the Federal Motor Carrier Safety Administration (FMCSA), an agency of the U.S. Department of Transportation, governing the safe operation of commercial motor vehicles (CMVs) and motor carriers. They set requirements for commercial driver's licenses, hours of service, vehicle safety, and motor carrier registration.

The Americans with Disabilities Act (ADA) is a federal civil rights law that prohibits discrimination against people with disabilities. The ADA Standards for Accessible Design, issued by the U.S. Department of Justice, set the minimum technical and scoping requirements for accessible new construction and alterations of facilities covered under Titles II and III.

The 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.

The National Electrical Contractors Association (NECA) is the U.S. trade association representing the electrical contracting industry through advocacy, education, research, and standards development. Founded in 1901, it serves electrical contractors via a network of local chapters and a national office in Washington, D.C.

The 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.

Associated Builders and Contractors (ABC) is a national construction industry trade association founded in 1950 that advances and defends the merit shop philosophy, representing contractors, subcontractors, material suppliers, and related firms across the United States.

The Associated General Contractors of America (AGC) is a leading national trade association for the commercial construction industry, representing general contractors, specialty contractors, and industry service providers. Founded in 1918, it advocates for the industry and provides education, safety, and business resources to its members.

The National Association of the Remodeling Industry (NARI) is a U.S. trade association dedicated exclusively to professional remodelers. It provides certifications, a Code of Ethics, education, and networking for residential and commercial remodeling contractors.

The National Roofing Contractors Association (NRCA) is one of the construction industry's most respected trade associations and a leading authority in the roofing industry, representing all segments of the roofing trade. Founded in 1886, it serves as the voice of roofing professionals for information, education, technology, and advocacy.

The 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 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.

The American Subcontractors Association (ASA) is a national, nonprofit trade association representing construction subcontractors, specialty trade contractors, and suppliers. It advances members' interests through advocacy, education, networking, and professional growth.

A voluntary construction standard for high-wind and hail resilience. A trained roofer or builder does the work and an independent FORTIFIED Evaluator documents it before IBHS issues the designation.

An IBHS designation for homes retrofitted against wildfire, at Essential (Base) and Enhanced (Plus) levels.

California's wildfire-exposure construction requirements, formerly CBC Chapter 7A and CRC R337.

A proposed California rule for the ember-resistant zone nearest a home. Effective date unconfirmed.

Who may sign Florida's wind-mitigation verification form that insurers use to price hurricane discounts.

Free FEMA-based training that qualifies California contractors for the public Earthquake Brace + Bolt directory.

NFIP Community Rating System (CRS), issued by FEMA / NFIP (flood).

FORTIFIED Roofing Company (listed in FORTIFIED Provider Directory), issued by IBHS (wind). Since 2025-11-01 any FORTIFIED designation requires roof installed by a certified FORTIFIED Roofing Company

NFPA Firewise USA recognition, issued by NFPA (wildfire).

BPI GoldStar Contractor, issued by Building Performance Institute (BPI) (energy).

DOE Zero Energy Ready Home (Builder Partner + Rater/Verifier), issued by US DOE (energy).

EPA Indoor airPLUS (Version 2, Gold), issued by US EPA (smoke, energy).

ASHRAE Guideline 44-2024 (wildfire smoke): standard, not a credential, issued by ASHRAE (smoke).

FEMA P-1100 Vulnerability-Based Seismic Assessment and Retrofit of One- and Two-Family Dwellings, issued by FEMA / Applied Technology Council (seismic). Not a credential; referenced by CRMP retrofit standard

CA voluntary home hardening certification program (AB 1934, Ch. 763 Stats 2026), issued by CA Office of the State Fire Marshal (wildfire).

IBHS FORTIFIED Commercial, issued by IBHS (wind).

SC Safe Home participating contractor/inspector, issued by South Carolina Department of Insurance (wind). See scsh-sc.

OID Approved Contractor (Strengthen Oklahoma Homes), issued by Oklahoma Insurance Department (wind). CIB licence + FORTIFIED Roofer ID + 2026 application form.

Miami-Dade Notice of Acceptance (NOA) / HVHZ product approval, issued by Miami-Dade County Product Control (wind). NOA is issued to manufacturers only; HVHZ installers must use NOA-listed products.

TDI Windstorm Inspection Program (WPI-8 certificate of compliance), issued by Texas Department of Insurance (wind). Inspection by TDI-appointed Texas PE or TDI windstorm inspector (WPI-8 during construction); WPI-8-E by Texas PE for completed work.

Residential energy code in Alabama: 2015 IECC-based Alabama Residential Energy Code. In force since 2016-10-01. Statewide code, enforced by local governments.

Residential 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.

Residential energy code in Arizona: No statewide residential energy code. Home rule: no mandatory statewide residential energy code; local governments adopt their own.

Residential 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.

Residential energy code in California: Title 24 Part 6, 2025 Energy Code. In force since 2026-01-01. Statewide mandatory code.

Residential 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.

Residential energy code in Connecticut: 2021 IECC (2022 Connecticut State Building Code). In force since 2022-10-01. Statewide mandatory code.

Residential energy code in Delaware: 2024 IECC with Delaware amendments (adopted April 2026). In force since April 2026. Statewide code, enforced by local governments.

Residential energy code in District of Columbia: 2015 IECC base (DC Energy Conservation Code). In force since 2020-05-29. Statewide mandatory code.

Residential energy code in Florida: Florida Building Code, Energy Conservation, 8th Edition (2023; 2021 IECC base). In force since 2023-12-31. Statewide mandatory code.

Residential energy code in Georgia: 2015 IECC with Georgia amendments. In force since 2020-01-01. Statewide code, enforced by local governments.

Residential energy code in Hawaii: State energy conservation code; counties adopt and enforce (IECC edition not confirmed). Statewide code, enforced by local governments.

Residential energy code in Idaho: 2018 IECC with Idaho amendments. In force since 2021-01-01. Statewide mandatory code.

Residential energy code in Illinois: 2024 IECC as amended by Illinois. In force since 2025-11-30. Statewide mandatory code.

Residential energy code in Indiana: Indiana Residential Code (2018 IRC-based); IECC edition not confirmed.

Residential 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.

Residential energy code in Kansas: No statewide residential energy code. Home rule: no mandatory statewide residential energy code; local governments adopt their own.

Residential 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.

Residential energy code in Louisiana: 2021 IECC with state amendments. In force since 2023-07-01. Statewide code, enforced by local governments.

Residential 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.

Residential energy code in Maryland: 2021 IECC with Maryland amendments. In force since 2023-05-29. Statewide code, enforced by local governments.

Residential energy code in Massachusetts: 2021 IECC with Massachusetts amendments (780 CMR chapter 11R, 10th edition). In force since 2024-10-11. Statewide mandatory code.

Residential energy code in Michigan: 2015 IECC per DOE; a 2021 rule set is reported stayed by court order.

Residential energy code in Minnesota: 2012 IECC residential provisions with Minnesota amendments (Minn. R. ch. 1322). In force since 2015-02-14. Statewide mandatory code.

Residential energy code in Mississippi: No statewide residential energy code per DOE; sources conflict.

Residential 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.

Residential energy code in Montana: 2021 IECC with Montana amendments. In force since 2022-06-10. Statewide mandatory code.

Residential energy code in Nebraska: 2018 IECC (Nebraska Energy Code). In force since 2020-07-01. Statewide mandatory code.

Residential energy code in Nevada: 2024 IECC (NAC 701.185, by reference). In force since 2024-08-18. Statewide minimum; local governments may adopt stricter.

Residential energy code in New Hampshire: 2018 IECC (RSA 155-A:1). Statewide code, enforced by local governments.

Residential 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.

Residential energy code in New Mexico: 2021 IECC as amended (14.7.6 NMAC). In force since 2024-01-30. Statewide mandatory code.

Residential 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.

Residential energy code in North Carolina: 2018 North Carolina Energy Conservation Code. In force since 2019-01-01. Statewide code, enforced by local governments.

Residential 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.

Residential 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.

Residential energy code in Oklahoma: 2024 IRC chapter 11 as amended (OAC 748:20-6-16). In force since 2026-09-14. Statewide mandatory code.

Residential 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.

Residential energy code in Pennsylvania: 2021 IECC (34 Pa. Code 403.21). In force since 2026-01-01. Statewide mandatory code.

Residential energy code in Rhode Island: 2024 IECC (RISBC-8). In force since 2025-12-01. Statewide mandatory code.

Residential energy code in South Carolina: 2009 IECC (S.C. Code 6-10-30). In force since 2013-01-01. Statewide mandatory code.

Residential 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.

Residential energy code in Tennessee: 2018 IECC with Tennessee exceptions (Tenn. Comp. R. 0780-02-23). In force since 2020-07-16 (last amendment).

Residential 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.

Residential 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.

Residential 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.

Residential energy code in Virginia: 2021 Virginia Residential Code (2021 IECC base per a search snippet). In force since 2024-01-18. Statewide mandatory code.

Residential energy code in Washington: 2021 Washington State Energy Code, Residential (WAC 51-11R). In force since 2024-03-15. Statewide mandatory code.

Residential 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.

Residential energy code in Wisconsin: 2009 IECC-based Uniform Dwelling Code (SPS 322). In force since 2016-01-01. Statewide mandatory code.

Residential 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), Title 24 Part 11, 2025 edition: statewide mandatory green-building measures for new buildings, in force since 2026-01-01.

Massachusetts' optional Stretch Energy Code and Specialized Opt-in Code, adopted by municipalities on top of the statewide base energy code.

ICC 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.

Green 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.

Green-building criteria for affordable housing from Enterprise Community Partners, covering energy, health and resilience, with Certification, Certification Plus and Certification Plus Zero Emissions tiers.