State plumbing guide · CT
Plumbing in Connecticut
Connecticut licenses plumbing contractors and journeypersons through the Department of Consumer Protection and builds under a single state building code with a plumbing portion based on the IPC.
- Median home built
- 1967
- Built before 1980
- 67%
- Owner-occupied
- 67%
- Winter
- Regular hard freezes
- General statewide rating
- Plumbing code
- IPC
- City guides
- 2
Housing figures: U.S. Census Bureau, ACS 2024 1-year (B25035, B25034).
Connecticut city plumbing guides
How to check a plumber's license in Connecticut
Connecticut's Department of Consumer Protection issues plumbing licenses, including the unlimited P-1 contractor and P-2 journeyperson licenses, each with a defined scope of work. [1]
Connecticut's older housing stock
Statewide, the median home was built in 1967 and 67% of homes predate 1980. Homes like that were usually built with copper or galvanized supply, cast iron drains, clay or cast iron sewer laterals. The city guides below show how much that varies within the state.
Which plumbing code applies in Connecticut
The 2022 Connecticut State Building Code, effective October 1, 2022, includes the 2021 International Plumbing Code with Connecticut amendments. [2]
Seasonal problems to plan for in Connecticut
- Winter
- Hard freezes: protect exposed pipes, disconnect hoses. Frozen pipes.
- Storm season
- Heavy rain: sewer backups and sump pump failures.
Connecticut plumbing questions
How do I check a plumber's license in Connecticut?
Use Connecticut's eLicense lookup to confirm the plumber's DCP license type (for example P-1 contractor or P-2 journeyperson).
Which plumbing code applies in Connecticut?
The 2022 Connecticut State Building Code, which includes the 2021 International Plumbing Code with Connecticut amendments.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035, B25034) · checked 2026-10-01
- Connecticut DCP, Plumbing Licenses and Scope of Work · checked 2026-10-01
- Connecticut Department of Administrative Services, 2022 Connecticut State Building Code · checked 2026-10-01