Accessory dwelling unit contractor — 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
A contractor manages the trades, materials, and timeline required to complete your backyard home. You need a contractor when you have design plans ready or need a lead to coordinate electricians, plumbers, and carpenters to get the structure move-in ready. They act as your project manager, ensuring that the work is finished on schedule and adheres to the building plans filed with your local municipality. Their role is essential for keeping the construction phase organized and safe.
Frequently asked in Hillsboro
What is a detached accessory dwelling unit in Hillsboro?
A detached accessory dwelling unit (ADU) in Hillsboro is a separate, independent living space constructed on a single-family residential lot. This could be a backyard cottage, garage conversion, or a new standalone structure. Detached ADUs must comply with Hillsboro's zoning ordinances regarding setbacks, lot coverage, and height restrictions, while offering a distinct living area from the main house. We ensure full compliance with local regulations.
Are there affordable ADU options in Hillsboro?
Affordable ADU options in Hillsboro are achievable through careful planning and design choices. We work with clients to explore cost-effective solutions, such as optimizing the unit's size and layout, selecting standard finishes, and utilizing efficient construction methods. Our goal is to deliver a high-quality ADU that meets your budget while adhering to all local building codes and standards for your Hillsboro property.
Who is a reliable ADU builder in Hillsboro?
What is the cost of accessory dwelling unit construction in Hillsboro?
The cost of accessory dwelling unit construction in Hillsboro is influenced by various factors, including the unit's size, design complexity, and the quality of materials used. Site preparation, foundation requirements, and the inclusion of specific features like full kitchens or utility hookups also play a role. We provide detailed quotes after a thorough assessment of your property and project specifications. Our aim is transparency in pricing.
What are homes with in-law suites like in Hillsboro?
Homes with in-law suites in Hillsboro, commonly known as accessory dwelling units (ADUs), are secondary living spaces on a primary residential lot. These units offer independent accommodations suitable for family members, guests, or as rental units. They must comply with all of Hillsboro's zoning ordinances and building codes, ensuring safety, functionality, and proper integration with the existing property. We guide you through all necessary requirements.
Where can I get an ADU quote in Hillsboro?
To obtain an ADU quote in Hillsboro, simply initiate contact with us. We'll schedule a time to discuss your project requirements, including the desired size, style, and any specific features you envision for your accessory dwelling unit. Following this consultation, we'll provide a detailed and accurate quote tailored to your Hillsboro property. This initial consultation is entirely free.
What is ADU housing in Hillsboro?
ADU housing in Hillsboro refers to the development and availability of accessory dwelling units within the city. These units provide additional housing stock, offering flexible living arrangements for residents. ADU housing contributes to the diversity of housing options and can be a valuable addition to existing single-family neighborhoods, provided they meet all of Hillsboro's established zoning and building regulations. We facilitate the creation of compliant ADUs.
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: Orenco, Brookwood, Walters Creek, Downtown Hillsboro, Shute Park — and every surrounding area.
Areas we serve
Browse by state, then city.