Accessory dwelling unit builders near me

Looking for accessory dwelling unit builders near me 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

Local builders provide the labor and project management needed to turn an empty backyard space into a functional living area. You need them when you have a vision for a guest house or rental but need a team familiar with your specific regional climate and local building department inspectors. Hiring nearby crews often simplifies logistics and ensures that your builder has established relationships with local supply houses and inspectors.

Frequently asked in Portland

What are the disadvantages of ADUs in Portland?

Disadvantages can include the initial construction cost, potential impacts on your yard space, and navigating Portland's detailed permitting process. You might also consider how an ADU affects your property taxes. Understanding these factors is key before starting.

How much does an ADU cost in Oregon?

The cost of an ADU in Oregon varies widely based on size, complexity, and finishes. Site preparation, utility connections, and specific design choices significantly influence the final price. A personalized quote for your Portland property will provide the most accurate cost.

What are the rules for ADUs in California?

California has state laws that encourage ADUs, often setting minimum standards for size and setbacks. Local jurisdictions also have their own specific ordinances. This means you'll need to check with the city or county where the ADU will be built for exact requirements.

Is ADU allowed in Maryland?

Yes, many areas in Maryland permit ADUs, but local zoning ordinances dictate the specific rules. Factors like lot size, existing structures, and permitted uses vary by county and municipality. It's essential to confirm the regulations for your specific Maryland location.

What are the rules for ADU in California?

California has generally favorable ADU laws, aiming to increase housing stock. Key rules often involve size limitations, owner-occupancy requirements for some ADU types, and streamlined permitting processes. You'll still need to check local city or county ordinances for precise details.

The California ADU grant program has provided funding to help offset pre-construction costs, such as design and permitting. Eligibility and specific grant amounts can change, so it's important to research current program details. These grants aim to make ADU development more accessible.

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, Mississippi Avenue — and every surrounding area.