Can I Build Garage in St. Louis, MO? (2026)

Building a detached or attached garage in St. Louis, MO typically requires a building permit through the local building department. Garages are governed by the same structural permit requirements as room additions, plus setback requirements that vary by zone. Detached garages must comply with accessory structure setbacks in St. Louis, and total lot coverage (all covered structures combined) must not exceed zone limits.

Garage Rules in St. Louis

Garage Construction Rules in St. Louis: Permit required: Conditional depending on size. A zone setbacks (typical): Front varies ft, Side varies ft, Rear varies ft. Check your zone's lot coverage limits — adding a garage may push total coverage over the maximum.

Costs & Fees

Contact the local building department through their official website for current permit fee information.

Next Steps

Next steps for building a garage in St. Louis: 1. Verify your zone setback requirements and lot coverage limits. 2. Prepare site plan showing garage location relative to property lines. 3. Submit a building permit application to the local building department. 4. Once approved, begin construction with required inspections at foundation, framing, and final.

St. Louis Building Division (Community Development Administration)

Frequently Asked Questions