Federal Data Hub › Census Building Permits · JSON

Williamson County, IL

Name: Building Permits — Williamson County, IL
License: https://creativecommons.org/publicdomain/zero/1.0/

Residential building permits · 2015–2025

Housing units authorized (2025): 141
Construction valuation (2025): $21,107,527
By structure type (2025): 1-unit 68 · 2-unit 6 · 3-4 59 · 5+ 8

Units authorized by year

Year	Units	Valuation
2025	141	$21,107,527
2024	138	$19,411,316
2023	129	$22,333,553
2022	146	$16,734,118
2021	93	$15,795,760
2020	178	$24,046,983
2019	178	$24,277,940
2018	229	$28,193,230
2017	118	$15,141,758
2016	113	$15,910,018
2015	99	$12,077,206

The Census Building Permits Survey counts new privately-owned housing units authorized by building permits — a leading indicator of housing supply. "1-unit" is single-family; "5+ units" is larger multifamily. Figures are imputation-adjusted to cover permit offices that did not report.

Source: Census Building Permits Survey. License: CC0 1.0.