Accessory dwelling unit cost — Gresham, OR
Last updated: September 24, 2026
What affects the price
Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.
About this service
The investment required for an ADU depends on your site conditions, the complexity of the design, and the materials selected for the interior. Larger units with custom features naturally shift the price higher compared to standard, compact models. Exact pricing confirmed free on the call.
Frequently asked in Gresham
How can I get an ADU quote in Gresham?
Where can I find accessory dwelling unit services near me in Gresham?
What are 'mother-in-law suites' in Gresham?
How do I get an ADU estimate in Gresham?
Are there accessory dwelling unit grants available in Gresham?
Can I get a 24-hour ADU service in Gresham?
What are the best accessory dwelling unit companies in Gresham?
Also serving nearby: Portland · Vancouver · Beaverton · Hillsboro · Salem
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Gresham — population 110,685; about 4,706 residents per square mile across 23.5 sq mi. ZIP codes covered include 97030, 97080.
Neighborhoods served in Gresham: Downtown Gresham, West Gresham, East Gresham, North Gresham, South Gresham — and every surrounding area.
Areas we serve
Browse by state, then city.