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
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Sept. 1, 2016; New Jersey moved to the 2024 IECC on August 17, 2026, so anything still showing 2021 for New Jersey is out of date; Pennsylvania adopts the 2021 IECC but amends the residential envelope requirements in its own regulation; California, Florida and Oregon run state-written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?'
The data
| State | Energy code in force | Effective date | Adopting authority | Statute / rule citation | No statewide residential requirement | State amendments | IECC edition basis |
|---|---|---|---|---|---|---|---|
| California | 2022 Building Energy Efficiency Standards | January 1, 2023 | California Energy Commission | Title 24, Part 6 | |||
| Colorado | Colorado Model Low Energy and Carbon Code | local jurisdictions adopt under a state mandate | |||||
| Florida | Florida Building Code, 8th Edition (2023) | December 31, 2023 | |||||
| Georgia | International Energy Conservation Code, 2015 Edition, with Georgia Supplements and Amendments | with Georgia Supplements and Amendments | |||||
| New Jersey | International Energy Conservation Code/2024 (Low-Rise Residential) | ||||||
| Oregon | Chapter 11 - Energy Efficiency | Oct. 1, 2023 | Oregon Building Codes Division | 2023 Oregon Residential Specialty Code (ORSC) | 2021 International Residential Code (IRC) | ||
| Pennsylvania | International Energy Conservation Code of 2021 | Pennsylvania Department of Labor and Industry | 34 Pa. Code 403.21 | ||||
| Texas | Energy Efficiency Chapter 11 of the 2015 International Residential Code (IRC) | Sept. 1, 2016 | SECO | Building Energy Efficiency Performance Standards | |||
| Washington | 2021 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL | WAC 51-11R | ADOPTION AND AMENDMENT OF THE 2021 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL |
Where this came from
Every record above links the page it was taken from and quotes the sentence that states it. These are the 9 sources this dataset was assembled from.
- energy.ca.govhttps://www.energy.ca.gov/programs-and-topics/programs/building-energy-efficiency-standards
- energyoffice.colorado.govhttps://energyoffice.colorado.gov/building-energy-codes
- floridabuilding.orghttps://www.floridabuilding.org/c/default.aspx
- dca.georgia.govhttps://dca.georgia.gov/community-assistance/construction-codes/current-state-minimum-codes-construction
- nj.govhttps://www.nj.gov/dca/codes/codreg/current.shtml
- oregon.govhttps://www.oregon.gov/bcd/codes-stand/Pages/energy-residential-compliance.aspx
- pacodeandbulletin.govhttps://www.pacodeandbulletin.gov/Display/pacode?file=/secure/pacode/data/034/chapter403/s403.21.html
- comptroller.texas.govhttps://comptroller.texas.gov/programs/seco/code/single-family.php
- apps.leg.wa.govhttps://apps.leg.wa.gov/wac/default.aspx?cite=51-11R
Machine-readable
- data.jsonThe whole dataset — every record with its source URL and source quote.
- Open Knowledge Format bundleOne JSON object per line — every record's frontmatter and quoted span exactly as it is held here, in one fetch.
- How this is made and checkedWhat "verified against source" does and does not mean.