1. States
  2. /Illinois
  3. /St. Clair County
  4. /O'Fallon
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Showing latest year with year-over-year changes. Full permit history available with a paid plan. View plans →

Year

Insightsi

Construction activity in 2024 was up 220% from the prior year, with 336 housing units permitted.

  • •950% more units than the average St. Clair County town (32), suggesting faster-than-typical growth.
  • •Average unit valued at $201K — 21% below the St. Clair County average of $253K, indicating more affordable construction.
  • •70.2% of new units were multi-family (apartments, condos, duplexes).

Total Unitsi

336 ▲ 220%

2024

Total Valuei

$67.5M ▲ 146.9%

2024

Single-Familyi

29.8%

100 units

Multi-Familyi

70.2%

236 units

O'Fallon vs. Avg. St. Clair Co. Town (2024)i

O'FallonAvg.Diff
Total Unitsi33632+950%
Total Valuei$67.5M$8.1M+733%
Single-Familyi10015+567%
Multi-Familyi23617+1288%
Buildingsi12718+606%
Value / Uniti$201K$253K-21%

Housing Units Permittedi

Solid line is O'Fallon; dashed line is St. Clair County average.

Construction Valuei

Solid line is O'Fallon; dashed line is St. Clair County average.

U.S. Census Bureau Building Permits Survey