City building permits · Jun 2026
O'Fallon Building Permits
Monthly residential building permits for O'Fallon, Illinois — 15 units in Jun 2026, 202 over the last 12 months — latest month -16.7% vs. a year earlier.
| Structure type | Units | Share |
|---|---|---|
| Single-family (1-unit) | 7 | 46.7% |
| 2-unit structures | 8 | 53.3% |
| 3–4 unit structures | 0 | 0.0% |
| Multifamily (5+ units) | 0 | 0.0% |
| All units | 15 | 100% |
Compare this area with the rest of the country: ranked leaderboards for permit volume, permits per capita, year-over-year growth, and multifamily share.
O'Fallon building permits — FAQ
How many building permits were issued in O'Fallon, Illinois?+
15 new residential units were authorized in O'Fallon in Jun 2026, and 202 over the trailing 12 months, per the Census Building Permits Survey.
What types of housing is O'Fallon permitting?+
In Jun 2026, 7 single-family and 0 units in 5+ unit buildings were permitted — 53.3% of the total was multifamily.
Why might O'Fallon's numbers be zero some months?+
Permit activity is lumpy at the city level, and small jurisdictions may report to the Census with a lag. Zero in a month means no permits were reported, not necessarily no construction interest.