Building Departments in Washington

There are 148 Building Departments in Washington, serving a population of 7,169,967 people in an area of 66,439 square miles. There is 1 Building Department per 48,445 people, and 1 Building Department per 448 square miles.

The state of Washington is ranked 17th in Building Departments per capita, and 22nd in Building Departments per square mile.

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Washington Building Structure & Housing Statistics

Find Washington 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.

Washington Residential Housing Units
 WashingtonUnited States
Total Housing Units3,025,516135,393,564
Occupied Housing Units2,755,697 (91.1%)118,825,921 (87.8%)
Washington Occupied Residential Buildings
 WashingtonUnited States
Single-Family Detached Homes1,755,776 (63.7%)74,725,744 (62.9%)
Single-Family Attached Homes108,658 (3.9%)7,108,474 (6.0%)
2 Apartments66,105 (2.4%)4,163,223 (3.5%)
3 or 4 Apartments101,419 (3.7%)5,096,643 (4.3%)
5 to 9 Apartments127,652 (4.6%)5,539,054 (4.7%)
10 or More Apartments417,542 (15.2%)15,360,749 (12.9%)
Mobile Home or Other Type of Housing178,545 (6.5%)6,832,034 (5.7%)
Washington Occupied Residential Buildings Construction Year
 WashingtonUnited States
2014 or Later34,594 (1.3%)1,027,503 (0.9%)
2010 to 201387,016 (3.2%)2,888,604 (2.4%)
2000 to 2009442,688 (16.1%)17,290,715 (14.6%)
1980 to 1999844,643 (30.7%)32,923,618 (27.7%)
1960 to 1979710,841 (25.8%)31,190,223 (26.2%)
1940 to 1959348,154 (12.6%)18,692,139 (15.7%)
1939 or Earlier287,761 (10.4%)14,813,119 (12.5%)
Washington Occupied Residential Buildings Room Characteristics
 WashingtonUnited States
1 Room66,566 (2.4%)2,205,033 (1.9%)
2 or 3 Rooms345,877 (12.6%)12,973,069 (10.9%)
4 or 5 Rooms901,220 (32.7%)41,694,651 (35.1%)
6 or 7 Rooms804,859 (29.2%)36,818,298 (31.0%)
8 or More Rooms637,175 (23.1%)25,134,870 (21.2%)
Washington Occupied Residential Buildings Bedroom Characteristics
 WashingtonUnited States
No Bedroom77,664 (2.8%)2,479,583 (2.1%)
1 Bedroom303,262 (11.0%)12,375,686 (10.4%)
2 or 3 Bedrooms1,742,250 (63.2%)77,772,411 (65.5%)
4 or More Bedrooms632,521 (23.0%)26,198,241 (22.0%)
Washington Occupied Residential Building Facility Characteristics
 WashingtonUnited States
With Complete Plumbing Facilities2,743,891 (99.6%)118,355,147 (99.6%)
With Complete Kitchen Facilities2,728,607 (99.0%)117,845,683 (99.2%)