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New Construction in O'Fallon
Residential building permits — U.S. Census Bureau Building Permits Survey.
Housing units authorized (2025)
446
Single-family
247
Multifamily
199
Construction value (2025)
$110M
| Year | Buildings | Units | Single-family | Multifamily | Value |
|---|---|---|---|---|---|
| 2025 | 276 | 446 | 247 | 199 | $110M |
Source: U.S. Census Bureau, Building Permits Survey. Counts are permits issued by the local permit office, which precede — and don't always become — actual construction. A partial-year row is marked with the months reported.