Connecticut · Building code

The building code in force in Connecticut now.

2022 Connecticut State Building Code (CSBC): based on the 2021 ICC family of codes plus ICC A117.1-2017 accessibility, with Connecticut amendments. Enforced by Municipal building officials (appointed under CGS Sec. 29-260) enforce locally; DAS Office of the State Building Inspector (OSBI) adopts the code statewide and handles state/threshold buildings. Verified on the primary source, re-checked weekly.

Enter a Connecticut ZIP code for the building view

Building code in Connecticut

Verified on the source

In force

2022 Connecticut State Building Code (CSBC): based on the 2021 ICC family of codes plus ICC A117.1-2017 accessibility, with Connecticut amendments

Applies to permit applications filed on/after Oct 1, 2022. Municipal building officials administer/enforce it in every town; OSBI directly permits/inspects certain state-owned and state-threshold construction and adopts the code.

Source: primary document

Who enforces it

Municipal building officials (appointed under CGS Sec. 29-260) enforce locally; DAS Office of the State Building Inspector (OSBI) adopts the code statewide and handles state/threshold buildings

Statewide layer. County and city amendments sit on top; the building view resolves them from your ZIP.

What changes next

Update pause law Oct 1, 2026

2026 CSBC (2024 IBC/IECC/IRC-based) missed its Jul 1, 2026 target and awaits legislative review; PA 26-58 (eff. Oct 1, 2026) pauses mandated code updates between the 2024 and 2030 model-code cycles, so 2022 CSBC likely stands for years

Dated items

Next 24 months

Oct 1, 2026

PA 26-58 takes effect: extends the required State Building/Fire code update interval to 2 years after a model-code revision and bars any mandated revision between the first 2024 model-code publication and the first 2030 model-code publicationConnecticut General Assembly; administered by DAS (OSBI) and the Office of the State Fire Marshal

Dated

Questions about the building code in Connecticut

Which building code applies in Connecticut today?

2022 Connecticut State Building Code (CSBC): based on the 2021 ICC family of codes plus ICC A117.1-2017 accessibility, with Connecticut amendments. Applies to permit applications filed on/after Oct 1, 2022. Municipal building officials administer/enforce it in every town; OSBI directly permits/inspects certain state-owned and state-threshold construction and adopts the code.

Who enforces the building code in Connecticut?

Municipal building officials (appointed under CGS Sec. 29-260) enforce locally; DAS Office of the State Building Inspector (OSBI) adopts the code statewide and handles state/threshold buildings.

What changes next for the building code in Connecticut?

Update pause law Oct 1, 2026. 2026 CSBC (2024 IBC/IECC/IRC-based) missed its Jul 1, 2026 target and awaits legislative review; PA 26-58 (eff. Oct 1, 2026) pauses mandated code updates between the 2024 and 2030 model-code cycles, so 2022 CSBC likely stands for years