Yes, you can build in Portland. The city has adopted the Residential Infill Project (RIP) allowing up to 4 units on most residential lots. Portland is a national leader in middle housing, ADU construction, and form-based zoning reform. Oregon state law (HB 2001) also requires the city to allow duplexes and fourplexes.
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ADU Status
Yes — up to 2 ADUs per lot, no parking required
Common Zones
R5, R7, R10, R20, CM, CG, EG
Permit Timeline
6-16 weeks
Key Constraint
Urban growth boundary, environmental zones
142 factors. 20+ government sources. Buildability Score in 20 seconds.
Score My Portland Property FreeZoning rules in Portland vary by address. Enter your specific property for accurate results. Always verify with the Portland planning department before making decisions.