Plumbing Work Permit Requirements in Dayton, OH

Ohio RCO based on 2018 IRC. Note: OH updated to 2021 IRC effective Mar 2024 but Dayton site still references 2019 RCO/2018 IRC.

Population: 135,500 Code: 2018 Verified: 2026-03-21 6 local rules

When you DON'T need a permit

Replacing a plumbing fixture (faucet, toilet) in the same location does not require a permit.

Source: City of Dayton Code / RCO / 2018 IRC

When you DO need a permit

Adding a new plumbing fixture requires a plumbing permit.

Estimated fee: $75 – $250

Typical timeline: About 2 weeks

Source: City of Dayton Code / RCO / 2018 IRC

Replacing a water heater requires a plumbing permit.

Estimated fee: $50 – $150

Typical timeline: About 1 week

Source: City of Dayton Code / RCO / 2018 IRC

Re-piping a house requires a plumbing permit.

Estimated fee: $150 – $600

Typical timeline: About 2 weeks

Source: City of Dayton Code / RCO / 2018 IRC

Adding a new plumbing fixture requires a plumbing permit.

Estimated fee: $75 – $250

Typical timeline: About 2 weeks

Source: City of Dayton Code / RCO / 2018 IRC

Re-piping a house requires a plumbing permit.

Estimated fee: $150 – $600

Typical timeline: About 2 weeks

Source: City of Dayton Code / RCO / 2018 IRC

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Building Department Contact

NameDivision of Building Inspection
Address371 West Second Street, 2nd Floor, Dayton, OH 45402
HoursMon-Fri 8:30am-4pm

Frequently Asked Questions

Estimated permit fees for Plumbing Work projects in Dayton, OH range from $75 – $250. Fees vary based on project scope and valuation.

It depends on the specifics of your project. Some smaller Plumbing Work projects may be exempt from permit requirements, while larger ones typically require a permit. Use our free lookup tool to check your specific situation.

Working without a required permit in Dayton can result in fines, stop-work orders, being required to remove completed work, and complications when selling your home. It's always best to check first.

Typical approval time for Plumbing Work permits in Dayton is About 2 weeks. More complex projects may take longer if plan review is required.

Learn More About Plumbing Work Permits

Read our complete guide covering permit requirements, costs, common exemptions, and the application process.

Read Plumbing Work Guide →

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Disclaimer: This information was last verified on 2026-03-21. Building permit requirements may change. Zoning requirements (setbacks, lot coverage, height limits) are separate and vary by location. Always confirm with your local building and planning departments before starting your project. PermitMint provides general guidance, not legal advice.