Adu estimate — 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
An ADU estimate provides a preliminary look at the potential investment required for your backyard project. This helps you determine if your budget aligns with your vision before you commit to full blueprints or engineering. You need an estimate early in the process to understand how factors like site grading and utility trenching affect the overall bottom line. This is a great starting point for any homeowner. Exact pricing confirmed free on the call.
Frequently asked in Gresham
What is the typical ADU cost for a Gresham homeowner?
What is an accessory dwelling unit, and is it right for me in Gresham?
What are the rules for building a detached accessory dwelling unit in Gresham?
What kind of accessory dwelling unit homes can be built in Gresham?
How can I find affordable ADU options in Gresham?
What's the cost of an accessory dwelling unit if I want one built in Gresham?
What ADU services are available for Gresham residents?
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: West Gresham, North Gresham, South Gresham, Pleasant Valley, East Gresham — and every surrounding area.
Areas we serve
Browse by state, then city.