State plumbing guide · OH
Plumbing in Ohio
Ohio sets a statewide plumbing code through its Board of Building Standards, based on the 2021 International Plumbing Code. Its big cities have a lot of mid-century housing, and freeze-thaw winters are hard on pipes.
- Median home built
- 1971
- Built before 1980
- 62%
- Owner-occupied
- 68%
- Winter
- Regular hard freezes
- General statewide rating
- Plumbing code
- IPC
- City guides
- 6
Housing figures: U.S. Census Bureau, ACS 2024 1-year (B25035, B25034).
Ohio city plumbing guides
How to check a plumber's license in Ohio
The Ohio Construction Industry Licensing Board licenses commercial plumbing contractors, and its eLicense Center offers a public license lookup. Residential plumbing registration is handled locally in many Ohio communities. [1]
Ohio's older housing stock
Statewide, the median home was built in 1971 and 62% of homes predate 1980. Homes like that were usually built with copper supply, early plastic (ABS or PVC) drains, some cast iron. The city guides below show how much that varies within the state.
Which plumbing code applies in Ohio
The 2024 Ohio Plumbing Code adopts the 2021 International Plumbing Code with Ohio amendments, effective March 1, 2024, under the Ohio Board of Building Standards. [2]
Seasonal problems to plan for in Ohio
- Winter
- Frozen pipes in exterior walls, crawl spaces and garages; outdoor faucets left connected to hoses.
- Spring
- Storms and snowmelt test sump pumps and basement floor drains.
Regions of Ohio
Central Ohio
Columbus: city-softened surface water, a mix of older neighborhoods and fast suburban growth.
Northeast Ohio
Cleveland: Lake Erie water, very old housing, lake-effect winters.
Ohio plumbing questions
Does Ohio have a statewide plumbing code?
Yes. The 2024 Ohio Plumbing Code, based on the 2021 International Plumbing Code with Ohio amendments, took effect March 1, 2024.
How do I check a plumbing contractor's license in Ohio?
Commercial plumbing contractors are licensed by the Ohio Construction Industry Licensing Board; use its eLicense lookup. For residential work, also ask your city which local registration applies.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035, B25034) · checked 2026-10-01
- Ohio Department of Commerce, Ohio Construction Industry Licensing Board · checked 2026-10-01
- Ohio Board of Building Standards, 2024 Ohio Plumbing Code rules (effective March 1, 2024) · checked 2026-10-01