| Washington County | 1990 | Census 1990 | Single-Family Detached | 38484 |
| Washington County | 2000 | Census 2000 | Single-Family Detached | 54270 |
| Washington County | 2010 | Estimates 2010 | Single-Family Detached | 63329 |
| Washington County | 2020 | Estimates 2020 | Single-Family Detached | 73783 |
| Washington County | 2022 | Estimates 2022 | Single-Family Detached | 76440 |
| Washington County | 1990 | Census 1990 | Townhomes (single-family attached) | 3889 |
| Washington County | 2000 | Census 2000 | Townhomes (single-family attached) | 8669 |
| Washington County | 2010 | Estimates 2010 | Townhomes (single-family attached) | 13117 |
| Washington County | 2020 | Estimates 2020 | Townhomes (single-family attached) | 15946 |
| Washington County | 2022 | Estimates 2022 | Townhomes (single-family attached) | 16458 |
| Washington County | 1990 | Census 1990 | Duplex, triplex and quad | 2095 |
| Washington County | 2000 | Census 2000 | Duplex, triplex and quad | 2180 |
| Washington County | 2010 | Estimates 2010 | Duplex, triplex and quad | 2823 |
| Washington County | 2020 | Estimates 2020 | Duplex, triplex and quad | 812 |
| Washington County | 2022 | Estimates 2022 | Duplex, triplex and quad | 817 |
| Washington County | 1990 | Census 1990 | Multifamily (5 units or more) | 5429 |
| Washington County | 2000 | Census 2000 | Multifamily (5 units or more) | 7020 |
| Washington County | 2010 | Estimates 2010 | Multifamily (5 units or more) | 11743 |
| Washington County | 2020 | Estimates 2020 | Multifamily (5 units or more) | 11968 |
| Washington County | 2022 | Estimates 2022 | Multifamily (5 units or more) | 13461 |
| Washington County | 1990 | Census 1990 | Manufactured Home | 1475 |
| Washington County | 2000 | Census 2000 | Manufactured Home | 1472 |
| Washington County | 2010 | Estimates 2010 | Manufactured Home | 1362 |
| Washington County | 2020 | Estimates 2020 | Manufactured Home | 1470 |
| Washington County | 2022 | Estimates 2022 | Manufactured Home | 1430 |
| Washington County | 1990 | Census 1990 | Other (Boat, RV, etc.) | 276 |
| Washington County | 2000 | Census 2000 | Other (Boat, RV, etc.) | 24 |
| Washington County | 2010 | Estimates 2010 | Other (Boat, RV, etc.) | 0 |
| Washington County | 2020 | Estimates 2020 | Other (Boat, RV, etc.) | 30 |
| Washington County | 2022 | Estimates 2022 | Other (Boat, RV, etc.) | 53 |
| Washington County | 2020 | Estimates 2020 | Accessory Dwelling Unit | 5 |
| Washington County | 2022 | Estimates 2022 | Accessory Dwelling Unit | 15 |