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 involves using your secondary unit as a source of monthly income by leasing it to tenants. You might consider this if you want to offset your mortgage or capitalize on high local demand for smaller housing. Success depends on local rental laws and how well the unit is designed for privacy. Exact pricing confirmed free on the call.
Frequently asked in Portland
How much does an affordable ADU cost in Portland?
Can I get an ADU built quickly in Portland?
What makes a local ADU expert valuable in Portland?
A local ADU expert in Portland brings invaluable knowledge of the city's specific zoning ordinances, building codes, and permitting procedures. They understand the unique characteristics of Portland neighborhoods and can advise on designs that are both aesthetically appropriate and compliant. Their experience with the local planning department ensures a smoother process. Working with a local specialist means you're getting guidance tailored to Portland's environment and regulations.
What's involved in getting an ADU quote in Portland?
What are the best ADU builders in Portland?
The best ADU builders in Portland are licensed, insured, and have a strong track record of successfully completing accessory dwelling unit projects. They possess a deep understanding of Portland's specific building codes and zoning regulations. Look for builders who communicate clearly, provide detailed project plans, and have positive client testimonials. They should be able to guide you through the entire process, from design to final inspection, ensuring quality and compliance for your Portland ADU.
Are there ADU housing options available in Portland?
Yes, ADU housing options are increasingly available in Portland due to supportive city policies. Homeowners can add ADUs to their existing properties to create rental units or multigenerational housing. Licensed ADU builders can help design and construct these units to meet all local codes. Whether you're looking to add a backyard cottage or convert existing space, there are options to increase housing availability within Portland's established neighborhoods.
What is the cost of an ADU in Portland, Oregon?
Also serving nearby: Vancouver · Beaverton · Gresham · Hillsboro · Salem
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
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: Alberta Arts District, Laurelhurst, Hawthorne District, Sellwood-Moreland, North Portland, Downtown Portland — and every surrounding area.
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