St. Louis County Home Building Costs
Building a house in St. Louis County, Missouri costs about $173/sq ft in 2026 — roughly $346,000 for a 2,000 sq ft mid-range home (construction only, land excluded). Population: 1,000,000.
Local Market Factors
- ›St. Louis metro
- ›Strong union presence
Cost by Home Size in St. Louis County
| Home Size | Basic | Mid-Range | Premium |
|---|---|---|---|
| 500 sq ft | $63,955 | $86,500 | $117,787 |
| 1,000 sq ft | $127,910 | $173,000 | $235,574 |
| 1,500 sq ft | $191,864 | $259,500 | $353,362 |
| 2,000 sq ft | $255,819 | $346,000 | $471,149 |
| 2,500 sq ft | $319,774 | $432,500 | $588,936 |
| 3,000 sq ft | $383,729 | $519,000 | $706,723 |
| 4,000 sq ft | $511,638 | $692,000 | $942,298 |
| 5,000 sq ft | $639,548 | $865,000 | $1,177,872 |
Costs are estimates only and represent construction costs, excluding land, architect fees, permits, and landscaping. Add 30–40% to these figures for total project cost.
County multiplier of 1.10× applied to Missouri state average (which itself is 0.88× the national average of $179/sq ft).
Cost data: HouseBuildCalc Permit Cost Index (876,000+ building permits, 1,700+ ZIP codes), U.S. Census Bureau Survey of Construction, BLS Producer Price Index, NAHB Cost of Constructing a Home (published summaries). County-level multipliers are estimates derived from regional market data. For planning purposes only.