Accessory dwelling unit builders near me

Looking for accessory dwelling unit builders near me in Portland, OR? Call AccessoryDwellingUnit Services for a contact a provider — no obligation. Licensed adu builders serve Portland and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.

About this service

Local builders are teams that specialize in residential structures within your specific region. They understand the particular building codes and environmental requirements of your city, which helps prevent delays during inspections. You need a local builder when you are ready to break ground and want a partner who knows the local permit office and site conditions well. This ensures your project stays on track and follows all area-specific rules.

Frequently asked in Portland

What are the disadvantages of ADUs in Portland?

Some potential disadvantages of ADUs in Portland might include navigating specific backyard regulations and ensuring compliance with the city's extensive zoning codes. You'll also want to consider the impact on your existing lot coverage and potential tree removal requirements. A professional assessment can clarify these points.

How much does an ADU cost in Oregon?

The cost of an ADU in Oregon, including Portland, is highly variable, influenced by size, design complexity, and site-specific factors like soil conditions and access. The type of foundation, interior finishes, and utility hookups significantly impact the final price. A personalized quote from a local builder is essential.

What are the rules for ADUs in California?

California has implemented strong statewide ADU laws to promote their construction, often setting clear standards for size, setbacks, and permitting. While these laws are progressive, they are specific to California. Portland's ADU regulations are shaped by Oregon state law and city ordinances.

Is an ADU allowed in Maryland?

Maryland's approach to ADUs varies by jurisdiction, with some counties and cities having well-defined rules while others may be more restrictive. For specific information regarding Maryland, consulting local planning and zoning departments is necessary. This service operates within the Portland, Oregon area.

What are the rules for ADUs in California?

California's ADU legislation generally aims to streamline the process and encourage the creation of accessory dwelling units. Rules often cover aspects like minimum lot size, owner occupancy, and impact fees. Oregon, and specifically Portland, has its own distinct set of regulations to follow.

Such financial incentives are typically state or local specific. It's advisable to research any current grant or incentive programs available within Oregon or the Portland metro area.

Also serving nearby: Vancouver · Beaverton · Gresham · Hillsboro · Salem

All cities in Oregon →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

630,498residents

4,723per sq mile

8ZIP codes served

Serving all of Portland — population 630,498; about 4,723 residents per square mile across 133.5 sq mi. ZIP codes covered include 97201, 97202, 97203, 97204, 97205, 97206, 97207, 97208.

Neighborhoods served in Portland: Hollywood District, Alberta Arts District, Sellwood-Moreland, Pearl District, Hawthorne District, Mississippi Avenue — and every surrounding area.