Adu near me — 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.
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Frequently asked in Hillsboro
What is the process for an ADU for rent in Hillsboro?
What are the steps for ADU construction in Hillsboro?
What makes an accessory dwelling unit the 'best' in Hillsboro?
What is the cost to build an accessory dwelling unit in Hillsboro?
What do 'adu services' in Hillsboro typically include?
What does 'what does accessory dwelling unit mean' in Hillsboro?
What are 'homes with mother-in-law suites' in Hillsboro?
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, Raleighwood, The Reserve at Hillsboro, South Hillsboro, North Hillsboro — and every surrounding area.
Areas we serve
Browse by state, then city.