ADU Contractors near Hillsboro, OR
ADU PDX
2325 NE 19th Ave, Portland, OR 97212
14 miles
ADU-PDX is a Portland-based ADU builder with 30+ years of experience. They specialize in garage conversions, detached ADUs, granny flats & in-law suites, handling permits and zoning for hassle-free builds across the Portland metro area.
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JAM Concept Remodeling
918 Northeast Killingsworth Street, Portland, OR 97211
14.3 miles
JAM Concept Remodeling is a Portland ADU contractor with 25+ years of experience in basement conversions, garage conversions, home additions, and residential remodeling, helping homeowners add functional living space and long-term property value.<... read more
Home Remodel Portland
8505-8835 SW Tualatin-Sherwood Road, Tualatin, OR 97062
12.9 miles
Home Remodel Portland builds code-compliant ADUs including garage conversions, backyard cottages, and basement units. They handle permits, zoning, and inspections with local expertise, offering a clear process and three-year warranty.
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TaylorSmith Sustainable Construction
6324 Northeast Davis Street, Portland, OR 97213
16.4 miles
TaylorSmith Sustainable Construction is a Portland, Oregon contractor specializing in sustainable new homes, renovations, energy retrofits, and ADU construction. All new builds target DOE Net Zero Energy Ready certification.
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Soft Studios
1804 Northeast Martin Luther King Junior Boulevard, Portland, OR 97212
13.3 miles
SQFT Studios, founded in 2015, is Portland's leading ADU design-build firm. Specializing in detached ADUs, garage conversions & backyard cottages, they deliver Earth Advantage Platinum-certified, sustainable builds tailored to every homeowner.... read more
Alta Casa
5123 Northeast 94th Avenue, Vancouver, WA 98662
19.5 miles
Alta Casa Remodeling is a Vancouver, WA ADU builder specializing in accessory dwelling units, garage conversions, in-law suites, and home additions. They also offer kitchen, bathroom, and full home remodels, backed by a one-year workmanship warran... read more
Triangle Bar Group
Gresham, OR 97227
24.4 miles
Triangle Bar Group is a Portland, Oregon design-build contractor specializing in custom homes, additions, remodels, and ADUs. They manage design, permitting, and construction under one roof, serving Portland and Vancouver, WA homeowners.
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Rybak & Company LLC
19215 Southeast 34th Street, Camas, WA 98607
22.7 miles
Rybak & Company LLC builds ADUs in Vancouver, Camas, Washougal & Portland Metro. Services include detached ADUs, garage conversions & in-law suites. Projects start at $175K–$250K+. Free estimates available.
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Jenson General Contracting
Newberg, OR 97132
15.8 miles
Jenson General Contracting builds ADUs in Newberg, Oregon, including detached units, garage conversions & in-law suites. Key rules cover size limits, height, setbacks & lot coverage. All Oregon ADUs need a bathroom, kitchen & separate ... read more
Reborn Construction LLC
29030 Southwest Town Center Loop East, Medford, OR 97070
17.2 miles
Reborn Construction LLC offers garage conversion and ADU services in Portland, OR. They handle permits, structural upgrades, and finish work for guest suites, rental units, and home offices across Portland, West Linn, Beaverton, and Gresham.
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Integrity Timber Frame (ITF)
2455 Northwest Campus Drive, Estacada, OR 97023
32.3 miles
Integrity Timber Frame offers custom prefabricated timber frame home, cabin, and ADU kits in South Dakota. Using their TruFit™ System and SIPs panels, they deliver strong, energy-efficient, sustainable structures with faster assembly and potenti... read more
Brothers Lane Builders
Salem, OR
40.9 miles
Brothers Lane Builders, LLC specializes in ADU (Accessory Dwelling Unit) construction for homeowners in Salem, Oregon. Whether you want a backyard cottage, in-law suite, or rental unit, our experienced team guides you through every step—from pla... read more
Born and Raised Construction
2020 Southeast Bush Street, Portland, OR 97202
14.3 miles
Born and Raised Construction builds ADUs in Portland, including detached units, garage conversions, backyard cottages & in-law suites. Benefits include rental income, aging in place & increased property value.
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Pacific Homes Direct
1650 Atlantic Avenue, Woodland, WA 98674
28.1 miles
Pacific Homes Direct in Woodland, WA offers customizable ADUs starting at $49,999. Serving Western Washington and Oregon, they provide granny flats, in-law suites, and backyard cottages with full-service support and factory warranty included.
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Shelter Solutions ADU Builders
502 7th Street, Oregon City, OR 97045
19.9 miles
Shelter Solutions is Portland's trusted ADU contractor since 1997, with 250+ completed projects. Specializing in detached ADUs, backyard cottages & in-law suites, they offer full design-build services, permit handling & expert guidance thr... 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.