AccessoryDwellingUnitExperts ES 📞 (815) 860-2798

Adu construction — Portland, OR

Looking for adu construction in Portland, OR? Call AccessoryDwellingUnit Experts 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 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

This is the physical process of building a secondary unit, which requires coordinating contractors, electricians, and plumbers. You need professional construction services when you are ready to break ground on your design. Costs are driven by the complexity of the foundation, interior finish levels, and site grading requirements. Exact pricing confirmed free on the call.

Frequently asked in Portland

What are the options for accessory dwelling units (ADUs) in Portland?

Accessory dwelling units (ADUs) in Portland come in various forms, including detached backyard cottages, garage conversions, and additions to existing homes. Many homeowners opt for these to provide rental income or accommodate family members. The choice often depends on lot size and zoning regulations. The pros can help you explore the best option for your property. They'll guide you through the design and construction.

How do I find accessory dwelling unit builders near me in Portland?
What's involved in getting an ADU company quote in Portland?

Getting an ADU company quote in Portland typically begins with a discussion about your project goals, including the desired size and type of unit. The contractor will then assess your property's site conditions and any specific requirements. This allows them to provide a detailed estimate covering materials, labor, and permits. Call us to schedule your consultation. We'll arrange for a pro to visit.

What are common features of homes with in-law suites in Portland?

Homes with in-law suites in Portland often include a separate entrance, a private bathroom, and a kitchenette or full kitchen, providing independent living quarters. These suites can be attached to the main house or built as a detached structure. They offer flexibility for extended family or as rental units. The goal is to create a functional and comfortable space. The pros can build these efficiently.

What is the cost of an accessory dwelling unit in Portland?
What are accessory dwelling unit grants available in Portland?

While specific grant programs can change, Portland has sometimes offered incentives or programs to encourage ADU development, particularly for affordable housing. It's best to check with the city's housing bureau or consult with ADU specialists. They can provide information on current availability. The pros can also advise on potential cost-saving measures during construction.

What does accessory dwelling unit mean in Portland?

In Portland, an 'accessory dwelling unit' (ADU) is a secondary, independent living space on a lot with a primary home. It includes its own kitchen, bathroom, and sleeping area. ADUs can be attached or detached and are regulated by the city to ensure they are safe and legal. They are a key part of Portland's housing strategy. The pros understand these regulations.

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

Areas we serve

Browse by state, then city.

Alabama (2)
California (14)
Colorado (2)
Connecticut (1)
District of Columbia (1)
Florida (9)
Georgia (3)
Idaho (1)
Illinois (1)
Indiana (1)
Iowa (1)
Kansas (1)
Louisiana (2)
Massachusetts (2)
Michigan (3)
Minnesota (1)
Missouri (1)
Montana (1)
Nevada (2)
New Jersey (1)
New Mexico (1)
New York (1)
North Dakota (1)
Ohio (1)
Oregon (3)
Pennsylvania (2)
Tennessee (1)
Texas (7)
Utah (2)
Virginia (2)
Washington (3)
Wisconsin (1)