Compare ADU zoning rules across 1 District of Columbia cities. Average ADU score: 7.0/10.
| City | Max Size | Setbacks | Permit Fees | Build Cost | 1BR Rent | Score |
|---|---|---|---|---|---|---|
| Washington | Larger of 450 sq ft or 30% of the required rear yard (detached accessory building footprint) | Minimum 12 ft from the alley centerline (DCMR Subtitle D 5004.1) | $1,000-$3,000 building permits; additional utility costs | $150,000-$250,000 | $1,400-$2,000 | 7/10 |
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