{ "name": "Which energy code each US state enforces for new homes: the IECC edition (or state equivalent) actually in force, with effective dates and amendments, from the state rules themselves", "description": "Which residential energy code is actually in force in a state, taken from the state's own rule or building-code authority, with the effective date and \u2014 where the rule states them \u2014 the state's amendments to it. Coverage is 9 states so far (California, Colorado, Florida, Georgia, New Jersey, Oregon, Pennsylvania, Texas, Washington), deliberately chosen to span the situations that break a one-size-fits-all answer, not the easy ones; the remaining states are listed as work to do in the asset's source notes rather than guessed at. What the pilot found: Georgia still runs the 2015 IECC with Georgia Supplements and Amendments even though it moved its other I-codes to the 2024 editions; Texas never adopted the IECC for homes at all, enforcing Chapter 11 of the 2015 International Residential Code since Sept. 1, 2016; New Jersey moved to the 2024 IECC on August 17, 2026, so anything still showing 2021 for New Jersey is out of date; Pennsylvania adopts the 2021 IECC but amends the residential envelope requirements in its own regulation; California, Florida and Oregon run state-written codes rather than adopting the IECC by name; and Colorado has no single statewide code, requiring local jurisdictions to adopt the state Model Low Energy and Carbon Code when they update any other building code. Answers 'which IECC edition does my state enforce?', 'what energy code applies to new residential construction in my state?', 'does my state amend the IECC or adopt it as written?', 'which states are still on the 2015 IECC?'", "url": "https://referencesource.org/energy-code-adoption-by-state/", "licence": "Sources are US state government pages (public records). We take facts plus short attributed quotes linking back. Facts about code adoption are not copyrightable (Feist, 1991). The ICC codes themselves are copyrighted; we quote only the state's statement of which edition it adopts, not the code text.", "last_verified": "2026-08-18", "stale_after": "2027-02-14", "sources": [ "https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards", "https://energyoffice.colorado.gov/building-energy-codes", "https://www.floridabuilding.org/c/default.aspx", "https://dca.georgia.gov/community-assistance/construction-codes/current-state-minimum-codes-construction", "https://www.nj.gov/dca/codes/codreg/current.shtml", "https://www.oregon.gov/bcd/codes-stand/Pages/energy-residential-compliance.aspx", "https://www.pacodeandbulletin.gov/Display/pacode?file=/secure/pacode/data/034/chapter403/s403.21.html", "https://comptroller.texas.gov/programs/seco/code/single-family.php", "https://apps.leg.wa.gov/wac/default.aspx?cite=51-11R" ], "records": [ { "state": "California", "energy_code": "2022 Building Energy Efficiency Standards", "effective_date": "January 1, 2023", "adopting_authority": "California Energy Commission", "statute_or_rule": "Title 24, Part 6", "id": "california", "url": "https://referencesource.org/energy-code-adoption-by-state/california/", "source": "https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards", "source_quote": "The 2022 Building Energy Efficiency Standards took effect January 1, 2023.", "verified_fields": [ "adopting_authority", "effective_date", "energy_code", "state", "statute_or_rule" ] }, { "state": "Colorado", "energy_code": "Colorado Model Low Energy and Carbon Code", "no_statewide_code": "local jurisdictions adopt under a state mandate", "id": "colorado", "url": "https://referencesource.org/energy-code-adoption-by-state/colorado/", "source": "https://energyoffice.colorado.gov/building-energy-codes", "source_quote": "State law requires local jurisdictions to adopt and enforce the Colorado Model Low Energy and Carbon Code upon updating any other building code.", "verified_fields": [ "energy_code", "state" ], "derived_fields": [ "no_statewide_code" ] }, { "state": "Florida", "energy_code": "Florida Building Code, 8th Edition (2023)", "effective_date": "December 31, 2023", "id": "florida", "url": "https://referencesource.org/energy-code-adoption-by-state/florida/", "source": "https://www.floridabuilding.org/c/default.aspx", "source_quote": "The Effective Date for the Florida Building Code, 8th Edition (2023), is December 31, 2023", "verified_fields": [ "effective_date", "energy_code", "state" ] }, { "state": "Georgia", "energy_code": "International Energy Conservation Code, 2015 Edition, with Georgia Supplements and Amendments", "amendments": "with Georgia Supplements and Amendments", "id": "georgia", "url": "https://referencesource.org/energy-code-adoption-by-state/georgia/", "source": "https://dca.georgia.gov/community-assistance/construction-codes/current-state-minimum-codes-construction", "source_quote": "International Energy Conservation Code, 2015 Edition, with Georgia Supplements and Amendments", "verified_fields": [ "amendments", "energy_code", "state" ] }, { "state": "New Jersey", "energy_code": "International Energy Conservation Code/2024 (Low-Rise Residential)", "id": "new-jersey", "url": "https://referencesource.org/energy-code-adoption-by-state/new-jersey/", "source": "https://www.nj.gov/dca/codes/codreg/current.shtml", "source_quote": "International Energy Conservation Code/2024 (Low-Rise Residential)", "verified_fields": [ "energy_code", "state" ] }, { "state": "Oregon", "energy_code": "Chapter 11 - Energy Efficiency", "iecc_basis": "2021 International Residential Code (IRC)", "effective_date": "Oct. 1, 2023", "adopting_authority": "Oregon Building Codes Division", "statute_or_rule": "2023 Oregon Residential Specialty Code (ORSC)", "id": "oregon", "url": "https://referencesource.org/energy-code-adoption-by-state/oregon/", "source": "https://www.oregon.gov/bcd/codes-stand/Pages/energy-residential-compliance.aspx", "source_quote": " Statewide alternate methods Statewide code interpretations Appeals Oregon design criteria hub Code adoption and review Adopted residential energy code 2023 Oregon Residential Specialty Code (ORSC) Chapter 11 - Energy Efficiency The provisions of Chapter 11 of the ORSC regulate the building thermal envelope, as well as the design, construction and selection of heating, ventilating and air-conditioning systems, piping insulation, lighting and power required for the purpose of effective conservation of energy within a building or structure governed by this code. Effective: Oct. 1, 2023 with 6 month phase-in period Mandatory: April 1, 2024 Based model code: 2021 International Residential Code (IRC)", "verified_fields": [ "adopting_authority", "effective_date", "energy_code", "iecc_basis", "state", "statute_or_rule" ] }, { "state": "Pennsylvania", "energy_code": "International Energy Conservation Code of 2021", "adopting_authority": "Pennsylvania Department of Labor and Industry", "statute_or_rule": "34 Pa. Code 403.21", "id": "pennsylvania", "url": "https://referencesource.org/energy-code-adoption-by-state/pennsylvania/", "source": "https://www.pacodeandbulletin.gov/Display/pacode?file=/secure/pacode/data/034/chapter403/s403.21.html", "source_quote": "‘‘Pennsylvania’s Alternative Residential Energy Provisions.’’ (2) The prescriptive methods for all other buildings or structures contained in the ‘‘International Energy Conservation Code of 2021’’", "verified_fields": [ "adopting_authority", "energy_code", "state", "statute_or_rule" ] }, { "state": "Texas", "energy_code": "Energy Efficiency Chapter 11 of the 2015 International Residential Code (IRC)", "effective_date": "Sept. 1, 2016", "adopting_authority": "SECO", "statute_or_rule": "Building Energy Efficiency Performance Standards", "id": "texas", "url": "https://referencesource.org/energy-code-adoption-by-state/texas/", "source": "https://comptroller.texas.gov/programs/seco/code/single-family.php", "source_quote": " SECO Single-Family Construction 2015 International Residential Code, Chapter 11 Effective Sept. 1, 2016, SECO adopted the Energy Efficiency Chapter 11 of the 2015 International Residential Code (IRC) as the state’s Building Energy Efficiency Performance Standards for residential construction (i.e., one- and two-family residences three stories or fewer above grade).", "verified_fields": [ "adopting_authority", "effective_date", "energy_code", "state", "statute_or_rule" ] }, { "state": "Washington", "energy_code": "2021 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL", "amendments": "ADOPTION AND AMENDMENT OF THE 2021 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL", "statute_or_rule": "WAC 51-11R", "id": "washington", "url": "https://referencesource.org/energy-code-adoption-by-state/washington/", "source": "https://apps.leg.wa.gov/wac/default.aspx?cite=51-11R", "source_quote": "STATE BUILDING CODE ADOPTION AND AMENDMENT OF THE 2021 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL", "verified_fields": [ "amendments", "energy_code", "state", "statute_or_rule" ] } ] }