Building Departments in Illinois

There are 202 Building Departments in Illinois, serving a population of 12,854,526 people in an area of 55,505 square miles. There is 1 Building Department per 63,636 people, and 1 Building Department per 274 square miles.

The state of Illinois is ranked 32nd in Building Departments per capita, and 14th in Building Departments per square mile.

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Illinois Building Structure & Housing Statistics

Find Illinois Residential Housing Units, Occupied Residential Buildings, 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, 2017 ACS 5-Year Estimates.

Illinois Residential Housing Units
 IllinoisUnited States
Total Housing Units5,334,847135,393,564
Occupied Housing Units4,818,452 (90.3%)118,825,921 (87.8%)
Illinois Occupied Residential Buildings
 IllinoisUnited States
Single-Family Detached Homes2,911,346 (60.4%)74,725,744 (62.9%)
Single-Family Attached Homes285,735 (5.9%)7,108,474 (6.0%)
2 Apartments247,221 (5.1%)4,163,223 (3.5%)
3 or 4 Apartments294,740 (6.1%)5,096,643 (4.3%)
5 to 9 Apartments296,549 (6.2%)5,539,054 (4.7%)
10 or More Apartments671,444 (13.9%)15,360,749 (12.9%)
Mobile Home or Other Type of Housing111,417 (2.3%)6,832,034 (5.7%)
Illinois Occupied Residential Buildings Construction Year
 IllinoisUnited States
2014 or Later19,126 (0.4%)1,027,503 (0.9%)
2010 to 201358,692 (1.2%)2,888,604 (2.4%)
2000 to 2009548,533 (11.4%)17,290,715 (14.6%)
1980 to 1999989,239 (20.5%)32,923,618 (27.7%)
1960 to 19791,275,756 (26.5%)31,190,223 (26.2%)
1940 to 1959927,882 (19.3%)18,692,139 (15.7%)
1939 or Earlier999,224 (20.7%)14,813,119 (12.5%)
Illinois Occupied Residential Buildings Room Characteristics
 IllinoisUnited States
1 Room103,317 (2.1%)2,205,033 (1.9%)
2 or 3 Rooms481,009 (10.0%)12,973,069 (10.9%)
4 or 5 Rooms1,677,516 (34.8%)41,694,651 (35.1%)
6 or 7 Rooms1,472,698 (30.6%)36,818,298 (31.0%)
8 or More Rooms1,083,912 (22.5%)25,134,870 (21.2%)
Illinois Occupied Residential Buildings Bedroom Characteristics
 IllinoisUnited States
No Bedroom119,273 (2.5%)2,479,583 (2.1%)
1 Bedroom523,046 (10.9%)12,375,686 (10.4%)
2 or 3 Bedrooms3,138,744 (65.1%)77,772,411 (65.5%)
4 or More Bedrooms1,037,389 (21.5%)26,198,241 (22.0%)
Illinois Occupied Residential Building Facility Characteristics
 IllinoisUnited States
With Complete Plumbing Facilities4,804,897 (99.7%)118,355,147 (99.6%)
With Complete Kitchen Facilities4,783,669 (99.3%)117,845,683 (99.2%)