ADUAllowed

Portland, OR

Portland ADU Permit Check.

Portland requires building permits and any applicable trade permits to build or convert space into an accessory dwelling unit.

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ADU eligibility screen

Portland requires building permits and any applicable trade permits to build or convert space into an accessory dwelling unit.

Portland accessory dwelling units High confidence
ADU eligibility screen

Portland requires building permits and any applicable trade permits to build or convert space into an accessory dwelling unit.

This answers the permit requirement, not whether a specific lot and design are approvable. Zoning, site, utility, building-code, tree, and overlay rules remain.

What this tells youComputed rule answer
How precise this isComputed rule answer
Official data checkedPortland accessory dwelling units
Next stepCheck parcel rules and project scope before design, purchase, or contractor conversations.
ADU permitBuilding permit required
Trade workApplicable electrical, plumbing, and mechanical permits also required
Still verifyZoning, lot/site constraints, utilities, building code, trees, and overlays
Confidence: HighComputed rule answerReviewed jurisdiction ruleReviewed July 2026
Portland accessory dwelling unitsOfficial source
aduportland mapsexact answerofficial rulereviewed threshold

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Common questions

What source does ADUAllowed use for Portland, OR?

Portland accessory dwelling units. Official agency pages remain final.

Can I act on this ADUAllowed result without checking the agency?

No. This answers the permit requirement, not whether a specific lot and design are approvable. Zoning, site, utility, building-code, tree, and overlay rules remain. Use the official source link before making a legal, safety, construction, property, or financial decision.