Compare adu construction estimates in Portland, OR
Free adu construction quotes in Portland, Oregon. Typical range $177,000 – $354,000.
Low
$177,000
Average
$265,500
High
$354,000
Portland crews quote about $295 – $590 per square foot.
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What drives adu construction prices in Portland
Local labor, permitting and climate move Portland prices away from the national average.
Labor market
Portland labor prices well above the national average with tight scheduling in summer.
Permits
City permits and design review can add weeks to exterior projects.
Climate
Long wet season limits the exterior build window and demands rot-resistant materials.
How to compare Portland quotes
- Collect three written quotes. Anything under $132,750 usually has scope missing.
- Compare line items — materials, labor, permits, disposal — not just the total.
- Confirm license, insurance and workmanship warranty length before you sign.
- Ask what triggers a change order and how it gets priced.
Portland questions
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