Building Departments in Williamson County, Illinois

There are 2 Building Departments in Williamson County, Illinois, serving a population of 67,477 people in an area of 421 square miles. There is 1 Building Department per 33,738 people, and 1 Building Department per 210 square miles.

In Illinois, Williamson County is ranked 29th of 102 counties in Building Departments per capita, and 14th of 102 counties in Building Departments per square mile.

List of Williamson County Building Departments

Find Williamson County, Illinois building departments, planning, permits, zoning, and inspections.

Herrin Building Department 300 North Park Avenue Herrin, IL

Jackson County Planning Department 608 E College St Carbondale, IL

About the Williamson County Building Department

Building Departments in Williamson County, IL are responsible for ensuring safe construction of buildings located in their jurisdictions. Building Departments create building codes and standards for building construction to ensure building safety. The Williamson County DOB is involved in all aspects of construction, including zoning laws, design requirements, building materials, trade and professional license regulation.

You may contact the Building Department for questions about:
  • Williamson County, Illinois building inspection records
  • Contractor license searches
  • Williamson County building codes
  • Building permit violations, appeals, and fines
  • Construction permits and building ordinances
  • Williamson County, IL zoning laws and requirements

Williamson County Building Structure & Housing Statistics

Find Williamson County Residential Housing Units, Occupied Residential Buildings Construction Year, Occupied Residential Buildings Room Characteristics, Occupied Residential Buildings Bedroom Characteristics, and Occupied Residential Building Facility Characteristics. Data Source: U.S. Census Bureau; American Community Survey, 2018 ACS 5-Year Estimates.

Williamson County Residential Housing Units
 Williamson CountyIllinois
Total Housing Units31,2005,347,268
Occupied Housing Units27,089 (86.8%)4,830,038 (90.3%)
Williamson County Occupied Residential Buildings
 Williamson CountyIllinois
Single-Family Detached Homes19,777 (73.0%)2,912,384 (60.3%)
Single-Family Attached Homes610 (2.3%)288,236 (6.0%)
2 Apartments1,679 (6.2%)248,181 (5.1%)
3 or 4 Apartments1,026 (3.8%)294,340 (6.1%)
5 to 9 Apartments740 (2.7%)299,097 (6.2%)
10 or More Apartments805 (3.0%)678,355 (14.0%)
Mobile Home or Other Type of Housing2,452 (9.1%)109,445 (2.3%)
Williamson County Occupied Residential Buildings Construction Year
 Williamson CountyIllinois
2014 or Later430 (1.6%)33,656 (0.7%)
2010 to 20131,300 (4.8%)66,478 (1.4%)
2000 to 20093,902 (14.4%)548,236 (11.4%)
1980 to 19997,109 (26.2%)992,290 (20.5%)
1960 to 19796,883 (25.4%)1,272,562 (26.3%)
1940 to 19593,456 (3,456.0%)919,590 (919,590.0%)
1939 or Earlier4,009 (14.8%)997,226 (20.6%)
Williamson County Occupied Residential Buildings Room Characteristics
 Williamson CountyIllinois
1 Room698 (2.6%)106,221 (2.2%)
2 or 3 Rooms21,012 (77.6%)3,134,650 (64.9%)
4 or 5 Rooms10,497 (38.8%)1,666,470 (34.5%)
6 or 7 Rooms10,152 (37.5%)1,471,423 (30.5%)
8 or More Rooms4,319 (15.9%)1,099,318 (22.8%)
Williamson County Occupied Residential Buildings Bedroom Characteristics
 Williamson CountyIllinois
No Bedroom708 (2.6%)122,619 (2.5%)
1 Bedroom1,372 (5.1%)522,594 (10.8%)
2 or 3 Bedrooms21,012 (77.6%)3,134,650 (64.9%)
4 or More Bedrooms3,997 (14.8%)1,050,175 (21.7%)
Williamson County Occupied Residential Building Facility Characteristics
 Williamson CountyIllinois
With Complete Plumbing Facilities27,054 (99.9%)4,816,603 (99.7%)
With Complete Kitchen Facilities26,893 (99.3%)4,794,163 (99.3%)