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.
Frequently asked in Gresham
What's involved in building a detached accessory dwelling unit in Gresham?
Are there accessory dwelling unit grants available in Gresham?
What is the process for ADU building in Gresham?
Tell me about modular accessory dwelling units in Gresham.
What are the rules for accessory dwelling unit rental in Gresham?
Can I get an estimate for ADU construction in Gresham?
How do I find ADU services 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: Centennial, East Gresham, North Gresham, Rockwood, South Gresham — and every surrounding area.
Areas we serve
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