Deck Permit in St. Louis (2026)
Deck permit requirements, fees, and process for St. Louis, MO. Find out if you need a permit and how to apply.
Yes, a Deck permit is required in St. Louis, MO.
A Deck 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 deck permit in St. Louis.
When Is a Permit Required?
When a Deck Permit Is Required in St. Louis: All decks over 30 inches from grade
Permit Fees
Deck Permit Fees in St. Louis: $100-$500. Estimated timeline: 2-4 weeks.
Estimated timeline: 2-4 weeks
How to Get a Deck Permit in St. Louis
Verify whether your project meets the permit threshold in St. Louis: All decks over 30 inches from grade.
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: $100-$500.
Wait for plan check approval. Estimated timeline: 2-4 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 permit required. St. Louis's brick four-flat and rowhouse buildings often have rear deck additions — structural assessment important given age of structures.
St. Louis Building Division (Community Development Administration)
Frequently Asked Questions
Source: St. Louis Building Code — Deck Requirements. Last verified April 6, 2026. View source