Compare ADU zoning rules across 5 Oregon cities. Average ADU score: 7.6/10.
| City | Max Size | Setbacks | Permit Fees | Build Cost | 1BR Rent | Score |
|---|---|---|---|---|---|---|
| Beaverton | 800 sq ft or 50% of the primary dwelling's gross floor area, whichever is less | Per underlying zone accessory-structure standards — Confirm with Beaverton Planning Division | Type 1 application fee plus valuation-based building permit fees (third-party guides estimate $2,500-$9,000) — Confirm with Beaverton Building Division | $150,000-$320,000 | $1,400-$1,700/mo | 7/10 |
| Bend | 800 sq ft maximum floor area | Per underlying zoning district; detached ADU must be at least 6 ft from the main house | $1,700-$2,900 | $140,000-$280,000 | $1,300-$1,800/mo | 7/10 |
| Eugene | 800 sq ft (or 10% of lot area, whichever is smaller) | 10 feet | $1,600-$2,700 | $140,000-$280,000 | $1,200-$1,700/mo | 8/10 |
| Portland | 800 sq ft or 75% of primary (whichever is less) | 5 feet | ~$1,900 permit and plan review; plus System Development Charges (SDCs) of about $19,000 - see impact fees | $150,000-$300,000 | $1,400-$1,900/mo | 9/10 |
| Salem | 900 sq ft (or 75% of the main building gross floor area, whichever is less) | Confirm with Salem Planning (SRC 700.007) | $1,800-$3,000 | $130,000-$260,000 | $1,100-$1,550/mo | 7/10 |
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