Best accessory dwelling unit — 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
The best ADU for your property is one that increases your home value while meeting your specific lifestyle needs. Whether you need a private office, a rental income source, or a space for family, the right unit features durable materials and an efficient layout. We focus on high-quality construction that stands the test of time, ensuring your investment is built to last. We help you design the perfect fit. Exact pricing confirmed free on the call.
Frequently asked in Hillsboro
What does an accessory dwelling unit mean in Hillsboro?
An accessory dwelling unit (ADU) in Hillsboro is a secondary housing unit on a single-family lot, providing independent living facilities. It can be attached to or detached from the primary residence and must comply with local zoning and building codes. ADUs are intended to offer more housing options within established neighborhoods. We help you understand the specific definitions and requirements in Hillsboro.
What ADU services are offered in Hillsboro?
ADU services in Hillsboro encompass a comprehensive range, including initial site assessments, architectural design, permit acquisition, and full construction management. Professionals handle everything from foundation work to final finishes, ensuring compliance with Oregon and local Hillsboro regulations. We offer expert guidance throughout the entire ADU project lifecycle.
What is the cost to build an accessory dwelling unit in Hillsboro?
Are there accessory dwelling unit grants in New Hampshire?
Accessory dwelling unit grants are typically administered at the state or local level. While specific programs in New Hampshire might exist, our focus is on serving clients within Hillsboro, Oregon. We can help you research potential funding opportunities relevant to your project location. Please confirm your location for accurate grant information.
Can I get emergency ADU services in Hillsboro?
What are the steps for accessory dwelling unit construction in Hillsboro?
Steps for accessory dwelling unit construction in Hillsboro begin with design and securing necessary permits from the city. This is followed by site preparation, including excavation and foundation work. Construction involves framing, roofing, and exterior finishing, then interior installations of plumbing, electrical, and HVAC systems. Final inspections and occupancy permits conclude the process. We manage these steps efficiently.
Can I get an accessory dwelling unit for rent 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: Downtown Hillsboro, Brookwood, Meridian, South Hillsboro, Orenco, Shute Park — and every surrounding area.
Areas we serve
Browse by state, then city.