Compare ADU zoning rules across 4 Washington cities. Average ADU score: 7.5/10.
| City | Max Size | Setbacks | Permit Fees | Build Cost | 1BR Rent | Score |
|---|---|---|---|---|---|---|
| Seattle | 1,200 sq ft | 5 feet | $1,800-$2,800 | $160,000-$320,000 | $1,600-$2,100/mo | 9/10 |
| Spokane | 1,000 sq ft | 15 feet | $2,000-$3,500 | $110,000-$220,000 | $1,000-$1,450/mo | 6/10 |
| Tacoma | 1,100 sq ft | 10 feet | $1,800-$2,800 | $135,000-$270,000 | $1,300-$1,750/mo | 8/10 |
| Vancouver | 1,050 sq ft | 10 feet | $1,900-$3,200 | $135,000-$270,000 | $1,250-$1,700/mo | 7/10 |
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