Code references for Connecticut

Compare publications and accessories linked by code family and edition to records for Connecticut. A match does not establish the requirement for your project. Read each record’s status, scope, dates and amendments, then confirm with the applicable authority.

Read the state coverage carefully

Connecticut has a single mandatory statewide building code and statewide fire code, jointly adopted by the State Building Inspector/Codes and Standards Committee (buildings) and the State Fire Marshal (fire), with Commissioner of Administrative Services approval. Per Conn. Gen. Stat. § 29-252, municipalities have no authority to adopt their own amendments or opt out — local officials enforce the single state code.

Authority: Connecticut Dept. of Administrative Services (DAS) — Office of the State Building Inspector (buildings/mechanical/plumbing/energy) and Office of the State Fire Marshal (fire codes), with the State Codes and Standards Committee

View the state's official source

International Building Code 2021

Recorded status: Confirmed statewide code

Jurisdiction: Connecticut. Applicability depends on the program, building type and local authority described below.

Program scope and amendment notes: Adopted as the 2022 Connecticut State Building Code with CT-specific amendments; errata #1 effective 2023-04-12. No municipal opt-out (Conn. Gen. Stat. §29-252).

Record last verified: 2026-09-03

Effective date: 2022-10-01

Recorded source: https://portal.ct.gov/-/media/das/office-of-state-building-inspector/2022-state-codes/2022-csbc-final.pdf

International Residential Code 2021

Recorded status: Confirmed statewide code

Jurisdiction: Connecticut. Applicability depends on the program, building type and local authority described below.

Program scope and amendment notes: Part of the 2022 CSBC package with CT amendments; includes Chapter 24 (Fuel Gas) provisions used in lieu of a standalone IFGC.

Record last verified: 2026-09-03

Effective date: 2022-10-01

Recorded source: https://portal.ct.gov/-/media/das/office-of-state-building-inspector/2022-state-codes/2022-csbc-final.pdf

International Existing Building Code 2021

Recorded status: Confirmed statewide code

Jurisdiction: Connecticut. Applicability depends on the program, building type and local authority described below.

Program scope and amendment notes: Part of the 2022 CSBC package with CT amendments.

Record last verified: 2026-09-03

Effective date: 2022-10-01

Recorded source: https://portal.ct.gov/-/media/das/office-of-state-building-inspector/2022-state-codes/2022-csbc-final.pdf

International Energy Conservation Code 2021

Recorded status: Confirmed statewide code

Jurisdiction: Connecticut. Applicability depends on the program, building type and local authority described below.

Program scope and amendment notes: Part of the 2022 CSBC package with CT amendments.

Record last verified: 2026-09-03

Effective date: 2022-10-01

Recorded source: https://portal.ct.gov/-/media/das/office-of-state-building-inspector/2022-state-codes/2022-csbc-final.pdf

International Mechanical Code 2021

Recorded status: Confirmed statewide code

Jurisdiction: Connecticut. Applicability depends on the program, building type and local authority described below.

Program scope and amendment notes: Part of the 2022 CSBC package with CT amendments.

Record last verified: 2026-09-03

Effective date: 2022-10-01

Recorded source: https://portal.ct.gov/-/media/das/office-of-state-building-inspector/2022-state-codes/2022-csbc-final.pdf

International Plumbing Code 2021

Recorded status: Confirmed statewide code

Jurisdiction: Connecticut. Applicability depends on the program, building type and local authority described below.

Program scope and amendment notes: Part of the 2022 CSBC package with CT amendments.

Record last verified: 2026-09-03

Effective date: 2022-10-01

Recorded source: https://portal.ct.gov/-/media/das/office-of-state-building-inspector/2022-state-codes/2022-csbc-final.pdf

International Swimming Pool and Spa Code (ISPSC) 2021

Recorded status: Confirmed statewide code

Jurisdiction: Connecticut. Applicability depends on the program, building type and local authority described below.

Program scope and amendment notes: Part of the 2022 CSBC package with CT amendments.

Record last verified: 2026-09-03

Effective date: 2022-10-01

Recorded source: https://portal.ct.gov/-/media/das/office-of-state-building-inspector/2022-state-codes/2022-csbc-notice-flex-fiscal.pdf

National Electrical Code 2020

Recorded status: Confirmed statewide code

Jurisdiction: Connecticut. Applicability depends on the program, building type and local authority described below.

Program scope and amendment notes: Adopted as part of the 2022 CSBC package; CT is one edition behind the 2021 IBC cycle for NEC.

Record last verified: 2026-09-03

Effective date: 2022-10-01

Recorded source: https://portal.ct.gov/-/media/das/office-of-state-building-inspector/2022-state-codes/2022-csbc-notice-flex-fiscal.pdf

International Fire Code 2021

Recorded status: Confirmed statewide code

Jurisdiction: Connecticut. Applicability depends on the program, building type and local authority described below.

Program scope and amendment notes: Adopted as Part III (New Construction) of the 2022 Connecticut State Fire Safety Code, with CT amendments; errata effective 2023-04-12.

Record last verified: 2026-09-03

Effective date: 2022-10-01

Recorded source: https://portal.ct.gov/das/office-of-state-fire-marshal/ct-fire-safety-and-prevention-codes/documents