R-1 (R-1-A, R-1-B) detached houses in Washington
Applies to district codes matching R-?1-?[AB]?.
Rules last checked by a person on October 20, 2026. Guidance only; confirm with Washington before you build.
Shed
| Location | Not in front of the house. A shed may sit in the required rear or side yardConfidence: medium |
|---|---|
| Side setback | 3 ft from a side lot line shared with another lot (since July 2026)Confidence: medium |
| Rear setback | 5 ft from a rear lot line shared with another lot; none along an alley, but 7.5 ft from the alley centerlineConfidence: medium |
| Height | 22 ft and 2 stories |
| Footprint | 650 sq ft or 30% of the required rear yard, whichever is greater |
| Lot occupancy | 40% for all buildings on the lot, accessory buildings included |
Garage
| Location | Not in front of the house and not in the required 25 ft rear yard (special exception needed)Confidence: medium |
|---|---|
| Side setback | 3 ft from a side lot line shared with another lotConfidence: medium |
| Rear setback | Outside the 25 ft required rear yard; 7.5 ft from any alley centerlineConfidence: medium |
| Height | 22 ft and 2 stories |
| Footprint | 650 sq ft or 30% of the required rear yard, whichever is greater |