Adu company — Portland, OR | AccessoryDwellingUnit Solutions

Looking for adu company in Portland, OR? Call AccessoryDwellingUnit Solutions 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 budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.

About this service

An ADU company handles the heavy lifting, from initial site assessments and design work to pulling permits and managing the actual construction. Instead of juggling multiple contractors yourself, a full-service team coordinates the various trades needed to finish the build. You need this service if you want to avoid the stress of managing site prep, plumbing, electrical, and structural framing on your own. Exact pricing confirmed free on the call.

Frequently asked in Portland

What are the disadvantages of ADUs in Portland?

In Portland, potential disadvantages of ADUs can include navigating complex permitting processes and adhering to strict zoning regulations regarding setbacks and lot coverage. Depending on the neighborhood, site preparation might be more challenging due to terrain or existing utilities. It's also important to consider the impact on neighborhood character and parking. We can help you find pros to discuss these factors.

How much does an ADU cost in Oregon?

What are the rules for ADUs in Portland?

Is an ADU allowed in Maryland?

This information is specific to Portland, Oregon. If you require details about ADU regulations in Maryland, you will need to consult resources tailored to that state. Laws and permitting requirements differ substantially by location. We focus on providing local expertise for ADU projects within the Portland metropolitan area.

Grant programs and financial incentives are specific to the region in which they are offered. We can help you find information relevant to ADU development within the Portland area. Contact us to explore local possibilities.

What are the rules for ADU in California?

California's ADU regulations are distinct from those in Oregon. While California has state-level laws promoting ADUs, Portland has its own set of local ordinances that govern these structures. It is essential to work with professionals who are knowledgeable about Portland's specific requirements. We can help you find those local experts.

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, Alberta Arts District, Mississippi Avenue, Sellwood-Moreland, Pearl District, Laurelhurst — and every surrounding area.