Need house plans or an addition design in St. Louis city, MO? St. Louis city has about 279,695 residents (2024 estimate) and 1 incorporated cities and towns. Describe your project once: architects and designers who work in St. Louis city get back to you.
Zoning and building permits in St. Louis city are handled by each city, or by the county in unincorporated areas.
Services available in St. Louis city
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Custom home design
Design of a new home, from concept to permit and construction drawings.
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Addition or remodel plans
Plans for an addition or a major remodel, ready for the permit and the builder.
Frequently asked questions in St. Louis city
Do architects and designers cover the whole of St. Louis city?
Most pros work across the county and neighboring counties. Enter your ZIP code in the form and we match you with pros who serve your exact area.
Architects in Missouri: all counties
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.