What are the Commercial Plumbing Systems permit rules in Missouri?

Missouri enforces trade permit fee schedules determined by local AHJ building departments per county. General contractors and sub-trades must maintain active state licenses and bond filings ($10,000–$50,000).

Are sub-trade contractor surety bonds required in Missouri?

Yes. Most Missouri municipal building departments require trade contractors to file an active license bond prior to permit issuance.

🚿 STATEWIDE TRADE HUB (MO) 1 County Workstations

Missouri Commercial Plumbing Systems Permit Guide

Fixture unit calculations, backflow preventers, and water main tap permits. Compare municipal fee structures, plan check add-on rates, and contractor bond thresholds across Missouri.

Missouri Commercial Plumbing Systems County Workstations

Select a county building department to calculate exact trade permit fees & bond rules

St. Louis County

St. Louis County Department of Transportation & Public Works

2026 Verified

Plan Review Rate: 35%

Tech Surcharge: 4%

Mandatory Surety Bond: $10,000

Open St. Louis County Commercial Plumbing Systems Workstation →