Plumbing Permit in St. Louis (2026)
Plumbing permit requirements, fees, and process for St. Louis, MO. Find out if you need a permit and how to apply.
Yes, a Plumbing permit is required in St. Louis, MO.
A Plumbing permit is required in St. Louis, MO. The St. Louis Building Division (Community Development Administration) handles permit applications for St. Louis. Below you will find the current thresholds, fees, and process for obtaining a plumbing permit in St. Louis.
When Is a Permit Required?
When a Plumbing Permit Is Required in St. Louis: All new plumbing work
Permit Fees
Plumbing Permit Fees in St. Louis: $75-$350. Estimated timeline: 2-3 weeks.
Estimated timeline: 2-3 weeks
How to Get a Plumbing Permit in St. Louis
Verify whether your project meets the permit threshold in St. Louis: All new plumbing work.
Prepare your permit application and plans. Contact the St. Louis Building Division (Community Development Administration) at https://stlouis-mo.gov/government/departments/building for required documentation.
Submit your application online at https://stlouis-mo.gov/government/departments/building/permits.cfm or in person at the St. Louis Building Division (Community Development Administration).
Pay the permit fee: $75-$350.
Wait for plan check approval. Estimated timeline: 2-3 weeks.
Schedule required inspections through https://stlouis-mo.gov/government/departments/building/inspections.cfm. All inspections must pass before project is finalized.
Important: St. Louis Building Division plumbing permit. Missouri-licensed plumber required. St. Louis Metropolitan Sewer District (MSD) governs sewer connections.
St. Louis Building Division (Community Development Administration)
Frequently Asked Questions
Source: St. Louis Building Code — Plumbing Requirements. Last verified April 6, 2026. View source