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When a permit is required
Permit triggers and exempt work for St. Louis
Major changes usually require reviewed drawings; many residential and commercial improvements require permits through the Building Division. Confirm scope requirements with the Building Division before proceeding.
Note: Thin public summary on the pages reviewed; confirm project-specific exemptions with the Building Division before assuming no permit is needed.
- Permit application
- Plans
- Sealed drawings where required
- Zoning-related submittals where applicable
- Building code
- 2018 IBC, 2018 IEBC, 2018 IRC, 2018 IECC, 2018 IPMC, 2018 IFC, 2021 UPC, 2018 IMC, 2018 IFGC, and 2017 NEC.
- Contractor requirements
- Verify trade and contractor licensing with the city before filing.
Source: City of St. Louis Building Division, Department of Public Safety ↗
Application process
Typical processing: Small residential work may be approved over the counter; larger residential and commercial projects require more extensive review.
- 01 Determine permit type and whether plan exam is needed through the Building Division and Plan Exam guidance.
- 02 Prepare plans, sealed drawings, and related approvals; zoning review is routed through the Building Division zoning section where applicable.
- 03 File through the city permit process or one-stop permit counter at City Hall.
- 04 Address review comments, pay fees, receive issued permit, then schedule inspections before occupancy or final approval.
Typical processing time: Small residential work may be approved over the counter; larger residential and commercial projects require more extensive review.
Source: City of St. Louis Building Division, Department of Public Safety ↗
Fee schedule
St. Louis building permit fees
In-person one-stop workflows are available at City Hall. Confirm online workflow details directly with the Building Division.
Fees change periodically. Confirm at the official fee schedule ↗ before budgeting.
Required inspections
Scheduling and sequence
- City Building Division — (314) 622-3332 (phone)
- Inspection hours
- Monday-Friday, 8:00 a.m. to 5:00 p.m.
Typical sequence: Varies by permit type; rough and final inspections are common.
Source: City of St. Louis Building Division, Department of Public Safety ↗
Frequently asked
Common questions about St. Louis permits
01 Do I need a building permit in St. Louis, MO? ▸
02 How much does a building permit cost in St. Louis, MO? ▸
03 How do I apply for a building permit in St. Louis, MO? ▸
04 How long does it take to get a building permit in St. Louis, MO? ▸
05 How do I schedule a building inspection in St. Louis, MO? ▸
Educational reference. Permit rules and fees change — confirm current requirements directly with City of St. Louis Building Division, Department of Public Safety before applying. Jaspector is not legal advice.