Prefabricated accessory dwelling unit — 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
A prefab ADU is built in a factory and then transported to your property for final assembly. These units are often faster to build than traditional construction because the work happens in a controlled environment. If you want to minimize noise and debris on your property or need a quicker turnaround for your backyard space, this is a great option.
Frequently asked in Gresham
What are the typical steps to get an ADU permit in Gresham?
How does Gresham's ADU policy differ from Portland's?
While both cities encourage ADUs, Gresham's specific zoning rules and permit processing times can differ. Gresham often aims for a streamlined approach once plans are submitted. Understanding these local nuances is crucial, and experienced contractors are familiar with Gresham's requirements. They can explain how the local regulations apply to your specific property.
What factors determine the timeline for ADU construction?
The primary factors influencing ADU construction timelines are the speed of permit approval from the city of Gresham and the complexity of the build. Site conditions, such as challenging terrain or extensive utility work, can also extend the schedule. Weather can play a role, especially during foundation and framing stages. The chosen design and material availability are also key.
Can I get an estimate for an ADU in Gresham over the phone?
Yes, you can get an initial estimate by calling. A specialist will discuss your project requirements, including the desired size and features of your ADU. They'll also ask about your property's location in Gresham. Based on this information, they can provide a preliminary quote to help you understand the potential investment involved.
What types of ADUs are common in Gresham?
Common ADU types in Gresham include detached backyard cottages, which are standalone units, and attached additions to existing homes. Some homeowners opt for garage conversions if they have suitable structures. The choice often depends on lot size, existing home layout, and intended use, such as rental income or housing for family members.
What is involved in site preparation for an ADU?
Can an ADU be used for rental income in Gresham?
Yes, ADUs are frequently built in Gresham to provide rental income. They offer a way to generate revenue from your property while potentially housing family members. It's important to be aware of any local ordinances regarding rental units and tenant rights. The professionals can advise on practical considerations for rental ADUs.
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: Meadowlawn, Oaks, Pleasant Valley, West Gresham, East Gresham — and every surrounding area.
Areas we serve
Browse by state, then city.