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
ADU services are the professional steps required to transform your backyard or garage into a functional living space. This process involves design consultations, structural engineering, and utility connections. You should look into these services if you are ready to increase your property value or need extra living space for relatives. We focus on making sure your project meets all safety codes and neighborhood regulations while fitting the specific design style of your main home.
Frequently asked in Gresham
What's involved in ADU building in Gresham?
What is the permit process for an accessory dwelling unit in Gresham?
Are prefabricated accessory dwelling units a good option in Gresham?
Prefabricated ADUs can be a viable option in Gresham, often offering faster construction times. These units are built off-site and then assembled on your property. The pros will assess your site to ensure it can accommodate a prefabricated unit. They'll also handle the foundation and utility connections. This can streamline the building process significantly.
Can I get a 24-hour ADU service in Gresham?
What does an ADU company do in Gresham?
What is the permit cost for an accessory dwelling unit in Gresham?
What is the typical cost of an accessory dwelling unit 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: Mount Tabor, West Gresham, East Gresham, Dawson Creek, Hoodview — and every surrounding area.
Areas we serve
Browse by state, then city.
