Adu quote — Hillsboro, OR
Last updated: September 24, 2026
What affects the price
Building an ADU is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.
About this service
An ADU quote is a detailed breakdown of the costs to build your specific project after we have reviewed your site and design choices. Factors like soil conditions, utility connections, and your choice of finishes will influence the final number. We provide a clear, line-item document so you know exactly where your money is going. Exact pricing confirmed free on the call.
Frequently asked in Hillsboro
What affordable ADU options are available in Hillsboro?
Affordable ADU options in Hillsboro can be achieved through thoughtful design and material choices. Focusing on functional layouts and standard finishes often helps manage costs. Prefabricated or modular ADUs can also offer cost efficiencies due to streamlined manufacturing processes. We work with professionals who understand budget-conscious construction methods and can explore strategies to make your ADU project economically feasible.
What are the requirements for homes with in-law suites in Hillsboro?
What are the rental possibilities for an ADU in Hillsboro?
Accessory dwelling units in Hillsboro offer excellent potential for rental income, providing additional housing options within the city. They are sought after for their privacy and independent living arrangements. The demand for rental units in the Hillsboro area continues to grow, making ADUs a potentially lucrative investment. We can help you connect with professionals who can advise on maximizing your ADU's rental appeal.
How do I get an ADU estimate in Hillsboro?
Who are the ADU builders in Hillsboro?
What is the process for obtaining an ADU permit in Hillsboro?
Obtaining an ADU permit in Hillsboro involves submitting detailed plans to the city's planning and building departments for review. These plans must comply with all local zoning ordinances and building codes. The review process ensures the proposed ADU meets safety and structural standards. Once approved, construction can begin, followed by final inspections to secure the certificate of occupancy.
What is the construction cost of an ADU in Hillsboro?
The construction cost of an ADU in Hillsboro varies significantly based on size, design complexity, materials used, and site preparation requirements. Obtaining a detailed quote from a qualified builder after a thorough site assessment is the most reliable way to determine the exact cost for your specific ADU project. We can help facilitate this process for you.
Also serving nearby: Beaverton · Portland · Vancouver · Gresham · Salem
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Hillsboro — population 107,730; about 4,168 residents per square mile across 25.8 sq mi. ZIP codes covered include 97123, 97124, 97129.
Neighborhoods served in Hillsboro: Brookwood, Century Farms, Jackson School, North Hillsboro, South Hillsboro — and every surrounding area.
Areas we serve
Browse by state, then city.