What are the zoning requirements for an ADU?
Last Updated June 24, 2026
Zoning rules vary by city, but generally require: the property is residentially zoned; the ADU meets size limits (often 500-1,200 sq. ft.); adequate setbacks, height limits, and parking are observed; and permits are obtained before construction. Oregon and Washington each have state-level ADU laws — Neil Kelly helps you navigate local requirements.
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