Adu Services in Portland, OR | AccessoryDwellingUnit Direct

Looking for adu services in Portland, OR? Call AccessoryDwellingUnit Direct 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 variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

ADU services simplify the process of adding extra living space to your lot. Whether you are looking to create a rental unit for extra income or a private space for family members, these services handle the architectural drawings, engineering, and city approvals required by your local jurisdiction. You should reach out for these services when you have a clear goal for your backyard space but need expert help turning that vision into a permitted, livable structure.

Frequently asked in Portland

What are the disadvantages of ADUs in Portland?

How much does an ADU cost in Oregon?

The cost for an ADU in Oregon depends heavily on factors like the size of the unit, the complexity of the design, and the site's specific conditions. Utility connections, foundation work, and the quality of finishes all significantly impact the overall price. To get a precise estimate, it's best to consult with ADU professionals who can assess your Portland property.

What are the rules for ADUs in California?

California has implemented state-wide ADU laws that streamline the process and often override local restrictions, encouraging ADU construction. These laws typically dictate maximum unit sizes and limit fees. While state guidelines are in place, individual cities may still have specific design or development standards. It's advisable to work with ADU experts knowledgeable about both state and local regulations.

Is ADU allowed in Maryland?

What are the rules for ADU in California?

California has offered various grant and loan programs to assist homeowners with ADU construction costs, sometimes amounting to tens of thousands of dollars. These programs usually have specific eligibility criteria and require an application process. Program details can evolve, so researching current offerings is recommended. Discussing your ADU plans with a local ADU service provider might reveal potential funding sources.

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: Hawthorne, Sellwood-Moreland, Alberta Arts District, Pearl District, Laurelhurst — and every surrounding area.