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
A dedicated contractor manages the heavy lifting of your ADU project. This involves hiring skilled tradespeople, ordering materials, and ensuring that every phase of construction passes municipal inspections. You need a contractor when you want a single point of contact to oversee the transition from a vacant backyard area to a fully finished, livable home. They bridge the gap between initial architectural designs and the final move-in date for your new space.
Frequently asked in Gresham
What are some popular mother-in-law suite options in Gresham?
How can I find affordable ADU construction in Gresham?
What is involved in ADU construction in Gresham?
Are prefab ADUs a good choice for Gresham homeowners?
What are some reputable accessory dwelling unit companies in Gresham?
What are accessory dwelling units (ADUs) in Gresham?
What is the best type of ADU for my property 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: South Gresham, North Gresham, Hollydale, West Gresham, Centennial — and every surrounding area.
Areas we serve
Browse by state, then city.
