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Connecticut residential energy code
Connecticut residential energy code (2021 IECC (2022 Connecticut State Building Code))
As of 2026-10-22. DOE's Building Energy Codes Program (energycodes.gov) lags state adoption, so where a state's own rule was read it governs and DOE's differing figure is noted. Residential means one- and two-family dwellings and townhouses. Local amendments can apply; check the code body before relying on a section.
Key features
- Code in force: 2021 IECC (2022 Connecticut State Building Code)
- In force since: 2022-10-01
- Adoption: Statewide mandatory code
- The 2026 code update is delayed pending legislative review (no date).
- Verified against the state's own adopted rule or code-body page.
Governing body
State of Connecticut
Region
CT
Category
code