State plumbing guide · KY
Plumbing in Kentucky
Kentucky regulates plumbing at the state level: the Department of Housing, Buildings and Construction writes the Kentucky State Plumbing Code and licenses master and journeyman plumbers. Older river cities and freeze-thaw winters shape many repairs.
- Median home built
- 1983
- Built before 1980
- 46%
- Owner-occupied
- 68%
- Winter
- Regular hard freezes
- General statewide rating
- Plumbing code
- State code
- City guides
- 2
Housing figures: U.S. Census Bureau, ACS 2024 1-year (B25035, B25034).
Kentucky city plumbing guides
How to check a plumber's license in Kentucky
Kentucky licenses master and journeyman plumbers by examination, and master plumbers must carry insurance and complete continuing education to renew. [1]
Which plumbing code applies in Kentucky
State law (KRS 318.130) requires Kentucky's Department of Housing, Buildings and Construction to adopt and amend the Kentucky State Plumbing Code, found in 815 KAR Chapter 20. [2]
Seasonal problems to plan for in Kentucky
- Winter
- Freeze-thaw cycles. Pipes in crawl spaces and exterior walls, plus outdoor faucets.
- Spring
- Heavy rain and river flooding. Basement seepage, sump pumps and sewer backups.
How old Kentucky's homes are
Statewide, the median home was built in 1983 and 46% of homes predate 1980. Homes like that were usually built with copper or CPVC supply, plastic drains, and in some homes gray polybutylene supply pipe. The city guides below show how much that varies within the state.
Regions of Kentucky
Louisville area
Ohio River water, a large share of pre-1980 homes and freeze-thaw winters.
Kentucky plumbing questions
How do I check a plumber's license in Kentucky?
Kentucky licenses master and journeyman plumbers through the Department of Housing, Buildings and Construction; ask for the license number and verify it with the department.
Does Kentucky have a statewide plumbing code?
Yes. The Kentucky State Plumbing Code (815 KAR Chapter 20) applies statewide and is maintained by the Department of Housing, Buildings and Construction.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035, B25034) · checked 2026-10-01
- Kentucky Legislative Research Commission, 815 KAR 20:030 Plumbing licenses · checked 2026-10-01
- Kentucky Legislative Research Commission, 815 KAR Chapter 20 · checked 2026-10-01