Checked
Building Permits in Williamson County, IL
New privately owned housing units authorized by building permits
- Units, last 12 months
- 148
- +20.3% from a year earlier
- Single-family homes
- 73
- In buildings with 5+ units
- 8
- Construction value
- $22.25M
- Last 12 months
New housing units authorized in Williamson County
New housing units authorized each month (not seasonally adjusted)
By building type, last 12 months
Swipe the table sideways to see more columns.
| Building type | Buildings | Housing units | Construction value |
|---|---|---|---|
| Single-family | 73 | 73 | $15.97M |
| 2 units | 5 | 10 | $713K |
| 3 and 4 units | 17 | 57 | $4.58M |
| 5 or more units | 1 | 8 | $989K |
Year by year
Final annual totals
Swipe the table sideways to see more columns.
| Year | All units | Single-family | 5+ units | Construction value |
|---|---|---|---|---|
| 2025 | 141 | 68 | 8 | $21.11M |
| 2024 | 138 | 80 | 5 | $19.41M |
| 2023 | 129 | 66 | 8 | $22.33M |
| 2022 | 146 | 63 | 10 | $16.73M |
| 2021 | 93 | 81 | 0 | $15.8M |
| 2020 | 178 | 173 | 0 | $24.05M |
Frequently asked questions
- How many building permits were issued in Williamson County?
- 148 new housing units were authorized in Williamson County, IL in the 12 months through Aug 2026, including 73 single-family homes.
- What does a building permit count mean?
- The Census Bureau counts new privately owned housing units authorized by building permits. A permit is not a finished home: some projects start months later and a few never start. Remodels and nonresidential buildings are not included.
- Why are some counties missing?
- Places without a local permit office are not covered, and some areas report only once a year. Census fills in estimates for permit offices that did not report in a given month.
Source: U.S. Census Bureau, Building Permits Survey · Through Aug 2026