adopting_authority string | effective_date string | energy_code string | id string | source string | source_quote string | state string | statute_or_rule string | url string | verified_fields list | derived_fields list | no_statewide_code string | amendments string | iecc_basis string |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
California Energy Commission | January 1, 2023 | 2022 Building Energy Efficiency Standards | california | https://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards | The 2022 Building Energy Efficiency Standards took effect January 1, 2023. | California | Title 24, Part 6 | https://referencesource.org/energy-code-adoption-by-state/california/ | [
"adopting_authority",
"effective_date",
"energy_code",
"state",
"statute_or_rule"
] | null | null | null | null |
null | null | Colorado Model Low Energy and Carbon Code | colorado | https://energyoffice.colorado.gov/building-energy-codes | State law requires local jurisdictions to adopt and enforce the Colorado Model Low Energy and Carbon Code upon updating any other building code. | Colorado | null | https://referencesource.org/energy-code-adoption-by-state/colorado/ | [
"energy_code",
"state"
] | [
"no_statewide_code"
] | local jurisdictions adopt under a state mandate | null | null |
null | December 31, 2023 | Florida Building Code, 8th Edition (2023) | florida | https://www.floridabuilding.org/c/default.aspx | The Effective Date for the Florida Building Code, 8th Edition (2023), is December 31, 2023 | Florida | null | https://referencesource.org/energy-code-adoption-by-state/florida/ | [
"effective_date",
"energy_code",
"state"
] | null | null | null | null |
null | null | International Energy Conservation Code, 2015 Edition, with Georgia Supplements and Amendments | georgia | https://dca.georgia.gov/community-assistance/construction-codes/current-state-minimum-codes-construction | International Energy Conservation Code, 2015 Edition, with Georgia Supplements and Amendments | Georgia | null | https://referencesource.org/energy-code-adoption-by-state/georgia/ | [
"amendments",
"energy_code",
"state"
] | null | null | with Georgia Supplements and Amendments | null |
null | null | International Energy Conservation Code/2024 (Low-Rise Residential) | new-jersey | https://www.nj.gov/dca/codes/codreg/current.shtml | International Energy Conservation Code/2024 (Low-Rise Residential) | New Jersey | null | https://referencesource.org/energy-code-adoption-by-state/new-jersey/ | [
"energy_code",
"state"
] | null | null | null | null |
Oregon Building Codes Division | Oct. 1, 2023 | Chapter 11 - Energy Efficiency | oregon | https://www.oregon.gov/bcd/codes-stand/Pages/energy-residential-compliance.aspx | <https://www.oregon.gov/bcd/codes-stand/Pages/alternate-methods.aspx> Statewide alternate methods <https://www.oregon.gov/bcd/codes-stand/Pages/code-interps.aspx> Statewide code interpretations <https://www.oregon.gov/bcd/codes-stand/Pages/appeal-decisions.aspx> Appeals <https://www.oregon.gov/bcd/codes-stand/Pages/des... | Oregon | 2023 Oregon Residential Specialty Code (ORSC) | https://referencesource.org/energy-code-adoption-by-state/oregon/ | [
"adopting_authority",
"effective_date",
"energy_code",
"iecc_basis",
"state",
"statute_or_rule"
] | null | null | null | 2021 International Residential Code (IRC) |
Pennsylvania Department of Labor and Industry | null | International Energy Conservation Code of 2021 | pennsylvania | https://www.pacodeandbulletin.gov/Display/pacode?file=/secure/pacode/data/034/chapter403/s403.21.html | ‘‘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’’ | Pennsylvania | 34 Pa. Code 403.21 | https://referencesource.org/energy-code-adoption-by-state/pennsylvania/ | [
"adopting_authority",
"energy_code",
"state",
"statute_or_rule"
] | null | null | null | null |
SECO | Sept. 1, 2016 | Energy Efficiency Chapter 11 of the 2015 International Residential Code (IRC) | texas | https://comptroller.texas.gov/programs/seco/code/single-family.php | <https://comptroller.texas.gov/programs/seco/> 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... | Texas | Building Energy Efficiency Performance Standards | https://referencesource.org/energy-code-adoption-by-state/texas/ | [
"adopting_authority",
"effective_date",
"energy_code",
"state",
"statute_or_rule"
] | null | null | null | null |
null | null | 2021 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL | washington | https://apps.leg.wa.gov/wac/default.aspx?cite=51-11R | STATE BUILDING CODE ADOPTION AND AMENDMENT OF THE 2021 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL | Washington | WAC 51-11R | https://referencesource.org/energy-code-adoption-by-state/washington/ | [
"amendments",
"energy_code",
"state",
"statute_or_rule"
] | null | null | ADOPTION AND AMENDMENT OF THE 2021 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL | null |
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
Canonical, always-current version: https://referencesource.org/energy-code-adoption-by-state/ Machine-readable: https://referencesource.org/energy-code-adoption-by-state/data.json — this mirror is a point-in-time copy.
- Last verified: 2026-08-18
- Stale after: 2027-02-14 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
- Records: 9
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 — where the rule states them — 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?'
Provenance — what every record carries
Every record carries source (the URL the value was read from) and
source_quote (a verbatim quote from that page stating it). A value you
cannot check against its page is indistinguishable from an invented one;
these can all be checked. Each record is also individually addressable on
the canonical site at its url.
Licence position
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.
Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.
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
Fields
See any record in data/records.jsonl — field names are self-describing,
and the canonical page for each record renders them with labels:
https://referencesource.org/energy-code-adoption-by-state/
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