ADU Contractors near Hillsboro, OR
RP Construction Custom Homes
6138 Inwood Ln S, Salem, OR 97306
37.3 miles
RP Construction is a family-owned custom home builder in Salem, Oregon, with 20+ years of experience and 110+ satisfied clients. They offer transparent pricing, clear communication, and quality craftsmanship from design to move-in.
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Propel Studio
422 Northeast 79th Avenue, Portland, OR 97213
17.1 miles
Relevant Buildings
15901 South Park Place Court, Oregon City, OR 97045
20 miles
If you’ve been looking for a modern, stylish ADU for your backyard, you’ve come to the right place. Relevant Buildings is an ADU builder in the Portland, Oregon area. They build ADUs throughout Oregon and Washington. Their goal is to make your home building journey as easy as possible.
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Suite Additions Portland
11825 Southwest Greenburg Road, Tigard, OR 97223
10.3 miles
Suite Additions Portland specializes in ADU construction, garage conversions, home additions, and accessibility remodeling in the Portland metro area. Led by Tim Jorgens (CCB #201364), they offer full-service design, permitting, and build solutions.
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Build Forward
222 SE Alder St, Portland, OR 97214
14.6 miles
Build Forward is an ADU contractor helping homeowners add accessory dwelling units to boost property value, generate rental income, and create flexible living spaces like granny flats, in-law suites, or detached ADUs.
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Shelter Solutions
502 7th Street, Oregon City, OR 97045
19.9 miles
Shelter Solutions, Portland's trusted ADU builder since 1997, has completed 250+ accessory dwelling units. Offering full design-build services—from permits to occupancy—they specialize in custom detached ADUs, backyard cottages, and in-law suites across the Portland Metro area.
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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, livable spaces.
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Roost Homes LLC
4569 NE 80th Avenue, Portland, OR
17.3 miles
Roost Homes LLC is a Portland-based contractor specializing in ADU design and build, home additions, and remodels. They offer energy-efficient detached ADUs, garage conversions, and full renovations tailored to client needs across the Portland metro area.
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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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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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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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Jason Allen Contracting, LLC
4804 Northeast 52nd Avenue, Portland, OR 97218
15.9 miles
Jason Allen Contracting, LLC is a Portland-based contractor specializing in ADU construction, home additions, basement remodeling, kitchen and bathroom renovations, garage conversions, and master plan design services for homeowners.
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JRW Construction LLC
24121 South Peach Road, Canby, OR 97013
21.5 miles
JRW Construction LLC offers full-service ADU construction, managing permits, inspections, and trade scheduling. They build detached ADUs, in-law suites, granny flats, garage conversions, and JADUs with quality finishes and energy-efficient systems.
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My ADU
10110 Northeast 13th Avenue, Vancouver, WA 98686
17.7 miles
MyADU is a licensed ADU contractor in Vancouver, WA, specializing in custom accessory dwelling units across the Pacific Northwest. Founded in 2019, they offer design, permitting, and turnkey builds, completing most projects in 6–9 months.
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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 warranty.
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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.