ADU Contractors near Hillsboro, OR
DeMarco Builders
3341 North Willamette Boulevard, Portland, OR 97217
11.8 miles
DeMarco Builders is a licensed general contractor since 1996, offering residential and commercial construction, custom homes, ADUs, remodels, and additions. Using critical path management, they deliver projects faster while maintaining quality.read more
Gencon
Clackamas, OR 97027
20.4 miles
Gencon is a family-owned ADU contractor serving Clackamas County, OR. They build detached ADUs, garage conversions, in-law suites & JADUs. Full-service from design to move-in-ready finish.
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Collins ADU Builders
2236 NE Alberta St, Portland, OR 97211
14.4 miles
Collins ADU Builders is a licensed Portland ADU contractor offering detached ADUs, garage conversions, JADUs, home additions & design services. Free consultations, transparent pricing, full permit coordination included.
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Sert Construction
1528 Southeast Holgate Boulevard, Portland, OR 97202
14.1 miles
As a premier ADU contractor in Portland, Sert Construction specializes in designing and building high-quality, functional ADUs. Whether you're considering an added space for rental income, additional family space, or a home office, their team of e... read more
AimHigh ADU Solutions
233 Southeast 2nd Avenue, Hillsboro, OR 97123
2.1 miles
Aim High ADU Solutions is a trusted ADU contractor in Hillsboro, OR, specializing in accessory dwelling unit construction. They offer expert planning, quality craftsmanship, and client-focused service to help homeowners expand their living space e... read more
Mighty ADU Company
2624 North Borthwick Avenue, Portland, OR 97227
12.8 miles
Mighty ADU Company is a trusted ADU contractor in Portland, OR, specializing in designing and building accessory dwelling units. They manage everything from planning and permitting to construction, ensuring quality, transparency, and stress-free r... read more
Exceptional Home Builders Salem
1525 11th Avenue, Salem, OR 98122
41 miles
Exceptional Home Builders Salem is a licensed ADU contractor with 20+ years of experience. They build backyard cottages, garage conversions & basement apartments in Salem, handling design, permitting & construction.
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ReCraft Home Remodeling
1623 Southeast 6th Avenue, Portland, OR 97214
15 miles
ReCraft Home Remodeling is a Portland-based contractor specializing in whole house remodels, kitchen, bathroom, basement renovations, and ADU construction, known for clear communication, careful planning, and on-time, on-budget delivery.
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Tweto Architecture
Portland, OR 97212
14.2 miles
Tweto Architecture specializes in ADU design, including detached ADUs, garage conversions & basement units. Serving Portland, Vancouver & Bend, they help homeowners add rental units, in-law suites & backyard cottages while navigating l... read more
Propel Studio
422 Northeast 79th Avenue, Portland, OR 97213
17.1 miles
Nikao Construction
2526 Goff Place, Hillsboro, OR 97116
9.2 miles
Jack Barnes Architect
2502 Southeast Belmont Street, Portland, OR 97214
14.4 miles
Jack Barnes Architect, PC is a licensed architectural firm in Portland, OR, specializing in residential design including ADUs, garage conversions, JADUs, and backyard cottages. Located on SE Belmont Street, they help clients navigate permitting an... read more
Peton Construction LLC
6635 North Baltimore Avenue, Portland, OR 97203
9.5 miles
Peton Construction LLC, founded by Austin Peton in 2015, serves the Portland metro area with residential construction services including ADU builds, home additions, bathroom remodels, renovations, decks, and patio covers.
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Cornerstone Builders Inc
7721 Southwest Cirrus Drive, Beaverton, OR 97008
8.4 miles
Cornerstone Builders Inc offers full-service ADU construction, including custom design, utility connections, and interior finishes. Specializing in detached ADUs, garage conversions, and JADUs, they use energy-efficient materials for functional, l... read more
The Remodel Group
9570 Southwest Tigard Street, Tigard, OR 97223
10.2 miles
The Remodel Group is a Portland-based design-build firm specializing in ADU construction and whole house remodeling. Services include detached ADUs, garage conversions, and JADUs. Earth Advantage certified, they offer sustainable, budget-conscious... read more
Other cities in Oregon
What you need to know
ADU Contractors in Hillsboro, Oregon: Building in the Heart of Silicon Forest
Hillsboro, Oregon, is one of the fastest-growing cities in the Pacific Northwest, home to major tech employers like Intel and Nike's nearby campus. This rapid growth has created a significant demand for additional housing, making Accessory Dwelling Units (ADUs) an increasingly popular solution for homeowners. Whether you're looking to house family members, generate rental income, or increase your property value, working with experienced ADU contractors in Hillsboro, OR is essential to navigating the city's specific building requirements.
Hillsboro ADU Regulations and Zoning Requirements
Before breaking ground, it's important to understand that Hillsboro operates under Washington County's land use regulations as well as its own municipal code. ADU contractors in Hillsboro must be well-versed in these local rules to ensure a smooth permitting process. Key regulations include:
- ADUs are generally permitted in single-family residential zones (R-5, R-7, R-9, and R-15)
- Detached ADUs typically cannot exceed 800 square feet or 75% of the primary dwelling's square footage
- Attached ADUs must comply with setback requirements, typically a minimum of 5 feet from side and rear property lines
- Oregon's statewide ADU legislation (HB 2001) has further streamlined approval processes for qualifying properties
- Separate utility connections and owner-occupancy requirements may apply depending on the property type
Types of ADUs Built by Hillsboro Contractors
Experienced ADU builders in Hillsboro, Oregon can construct several types of accessory dwelling units tailored to your property and budget. The most common options include:
- Detached ADUs: Standalone structures built in the backyard, offering maximum privacy for both occupants
- Attached ADUs: Units connected to the primary home, often more cost-effective to build
- Garage Conversions: Transforming existing garages into livable spaces, a popular option in established Hillsboro neighborhoods
- Basement Conversions: Utilizing existing below-grade space to create a separate living unit
Why Hire a Local ADU Contractor in Hillsboro?
Hiring a local ADU contractor in Hillsboro, OR offers distinct advantages over working with out-of-area builders. Local contractors have established relationships with the City of Hillsboro's Community Development Department, understand Washington County's permitting timelines, and are familiar with regional building materials suited to the Pacific Northwest's rainy climate. They can also help you take advantage of Oregon's SDC (System Development Charge) exemptions, which can significantly reduce upfront construction costs for qualifying ADU projects.
Start Your Hillsboro ADU Project Today
With Hillsboro's housing market continuing to grow alongside its thriving tech economy, now is an excellent time to invest in an ADU. Partnering with a qualified, licensed ADU contractor in Hillsboro, Oregon ensures your project meets all local codes, stays on budget, and delivers lasting value to your property. Request multiple quotes, verify contractor licenses through the Oregon Construction Contractors Board (CCB), and review past project portfolios before making your decision.