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
A contractor oversees the daily building process, ensuring the foundation, framing, and finishes meet safety standards. You need one when you are ready to break ground and want a single point of contact to supervise tradespeople like electricians and plumbers. They act as the primary manager for your project, ensuring the work stays on track and adheres to the approved blueprints throughout the entire construction phase.
Frequently asked in Portland
What are the disadvantages of ADUs in Portland?
In Portland, potential disadvantages of ADUs might include navigating specific city zoning and permitting processes, ensuring adequate parking, and the upfront construction costs. The impact on existing yard space is also a consideration. An expert consultation can clarify these points.
How much does an ADU cost in Oregon?
The cost of an ADU in Oregon, including Portland, varies significantly based on size, materials, complexity of the build, and any necessary site work or utility upgrades. Factors like foundation type and interior finishes also play a role. A personalized quote will provide the most accurate estimate.
What are the rules for ADUs in California?
California has state-level laws designed to facilitate ADU development, often including streamlined permitting and reduced parking requirements. However, individual cities and counties in California may have their own specific additional regulations. Always verify local rules for your intended location.
Is an ADU allowed in Maryland?
Yes, accessory dwelling units are permitted in many areas of Maryland, including Baltimore, subject to local zoning ordinances. These rules can cover aspects like the ADU's size, placement on the property, and the required permits. Consulting a local expert familiar with Maryland's regulations is advised.
What are the rules for ADU in California?
California's statewide ADU legislation aims to make building accessory dwelling units more accessible, often with reduced parking mandates and faster approval processes. However, individual cities and counties within California can impose their own specific rules. Confirm local ordinances for your project site.
California has offered various financial assistance programs for ADU projects, such as grants and loans, to help with construction costs. Eligibility for these programs often depends on income levels and the nature of the project. Researching current state and local funding options is recommended.
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: Pearl District, Nob Hill, Hawthorne District, Sellwood-Moreland, Alberta Arts District, Mississippi Avenue — and every surrounding area.
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