Oregon ADU Builders and Contractors

What an ADU looks like in Oregon depends on where in the state you're building. In Portland, projects often involve tight backyards or replacing an existing garage. In Bend, lots are typically larger, and the unit usually functions as a fully separate home. The contractors on this list reflect those differences in what they build, in how they handle permitting, and in how they approach design.

Portland metro ADU builders

ADU Design & Build

ADU Design & Build is one of the few firms in Portland that limits its work almost entirely to accessory dwelling units. Design and construction sit under one team from the start, and the focus is detached backyard homes and small infill units, not additions tied to the main house.

Address: 1340 NW 19th Ave, Portland, OR

Facebook: https://www.facebook.com/adudesignandbuild/ 

Catalyst Construction

Catalyst Construction is owner-operated by Ryan Klobas and has been working in the Portland metro for over twenty years, with basement-to-ADU conversions appearing throughout the project gallery alongside garage conversions and standalone units. The firm runs a single-contract design-build process from sketch to final walk-through.

Address: 825 NE 20th Ave. Suite A, Portland, OR, United States, 97232 

Facebook: https://www.facebook.com/CatalystConstructionPDX

MyADU

MyADU front-loads permitting and feasibility before any construction begins, walking homeowners through zoning, approvals, and site constraints first. The firm offers proven model designs including the Mt. Rainier, Multnomah, and Columbia, and the team has built ADUs to accessibility standards for clients housing aging parents.

Address: 10110 NE 13th Ave, Vancouver, WA 98686

Facebook: https://www.facebook.com/myaduwa 

Backyard Blueprint

Backyard Blueprint is a family-owned ADU builder where the General Manager left a 28-year tech career and now works alongside two of his sons, with a Certified Aging-In-Place Specialist named Sarah on staff. The firm offers fifteen-plus pre-designed ADU floorplans, runs projects on a roughly four-to-six-month timeline, and partnered with KOIN6 News to build a 600-square-foot ADU for a client whose home had been destroyed.

Instagram: https://www.instagram.com/backyardblueprintadu/

EcoCraft

EcoCraft was founded in 2012 by Edwin Hooker, who previously built custom straw bale homes in Colorado before moving into commercial high-rise and hospital construction. The firm runs cost-plus contracts with transparent project-management software so clients see costs accrue in real time, and recent ADU projects include the Cedar Hills ADU built for a mother and daughter and the Historic Irvington ADU built within Irvington's design guidelines.

Address: 333 S. State St. V305 Lake Oswego, OR 97034

Facebook: https://www.facebook.com/Ecocraftpdx

Shelter Solutions

Shelter Solutions was founded by Joe Robertson in 1999 and has built more than 250 ADUs across Portland Metro since then, with generational living and aging in place named on the site as core specialties. Robertson started studying ADUs in 1997 when Portland's zoning code first allowed them by right, and his first project was an accessibility-focused ADU in Laurelhurst with a roll-in shower and a movable kitchen island.

Address: 502 7th St Ste 204, Oregon City, OR 97045

Facebook: https://www.facebook.com/ShelterSolutions/

Portland ADU

Portland ADU is run by Jason Ali Allen, a builder whose path included apprenticing on Germany's first permitted two-story straw bale house under a Master Carpenter of the Guild before founding his Portland general contracting company in 2006. His ADU work has shifted over the years from historic home restoration toward contemporary remodels and basement and backyard ADUs.

Address: 4804 NE 52nd Ave, Portland, OR 97218

Facebook: https://www.facebook.com/people/Portland-ADU/

RP Construction Homes

RP Construction Homes is a Salem-based family business with twenty-five years of custom home and ADU experience, designing detached units to match the main residence in materials and architectural style. The result reads more like a second house on the property than a separate accessory structure.

Address: 6138 Inwood In s, Salem, OR 97306

Facebook: https://www.facebook.com/rpconstructionhomes

ADU PDX

ADU PDX was founded by longtime architect Dave Spitzer after he built his first ADU on his own property in the early 2000s, formally launching the firm following the 2008 downturn. With more than thirty years of architectural experience and over a hundred ADUs designed across the Portland metro, the company splits its work between basement and garage conversions for family use and ground-up rental units on infill lots.

Address: 2325 NE 19th Ave, Portland, OR 97212

Keyser Construction

Keyser Construction is a family-run general contractor in West Linn that has been in business since 1996, primarily working on kitchen and bathroom remodels but also taking on ADUs, additions, and outdoor living projects. The team works in both English and Spanish, and the company donates reusable leftover materials to a local nonprofit.

Address: 452 SW Alderwood Dr, West Linn, OR 97068

Facebook: https://www.facebook.com/KeyserConstructionInc/#

Relevant Buildings

Relevant Buildings specializes in prefabricated shipping container ADUs, with wood-framed and pole-barn-style units offered as alternatives when site access or layout flexibility calls for it. The firm sources Oregon BCD or Washington L&I approved plans for its standard models, insulates with closed-cell spray foam at least ten percent above building code, and partners with a local nonprofit lender that specializes in ADU financing.

Address: 15901 S Park Pl Ct, Oregon City, OR 9704

Facebook: https://www.facebook.com/RelevantBuildings/

The Powell Group

The Powell Group is a hands-on Portland metro homebuilder run by Mitch Powell, with twenty-plus years of experience constructing custom homes and ADUs across the greater Portland metropolitan area. The firm positions itself as a guide through each step of the homebuilding process and frames its homes as built to last well beyond a single owner's lifetime.

Address: 118 NW King Ave Unit 21 Portland, OR 97210

Facebook: https://www.facebook.com/thepowellgrouppdx/

Reborn Construction

Reborn Construction builds custom ADUs in detached, garage-conversion, and basement formats, and the company highlights aging-in-place builds with accessibility features like no-step entries, wide doorways, and barrier-free showers. The shop is owner-operated by Justin Schaan and runs out of Wilsonville.

Address: 29030 SW Town Center Loop E Ste 202-308, Wilsonville, OR 97070, United States

Instagram: https://www.instagram.com/rebornconstructionllc/

SQFT Studios

SQFT Studios was founded in 2015 by architect Eli Green and built its first detached AirBnB studio in Portland in early 2017. The flagship pre-designed model is the 288 ADU, a 288-square-foot turnkey unit starting at $195,000 with advanced framing and Mineral Wool insulation; recent custom work includes the Sellwood Teahouse ADU and the Vaulted 1 Bedroom ADU with loft.

Address: 1018 SE 8th Ave Portland, OR 97214

Facebook: https://www.facebook.com/sqftstudios

Cooper Design Builders

Cooper Design Builders has been operating as a Portland-area design-build contractor since 1991, with a personalized team of design and construction specialists handling each project from start to finish. The firm serves Beaverton along with Kerns, Central Eastside, and Northeast Portland.

Address: 4560 SW 96th Ave, Beaverton, OR 97005

Facebook: https://www.facebook.com/cooperdesignbuildpdx/

Lamont Bros

Lamont Bros is a family-owned design-build firm established in 2008 in West Linn, with eleven to fifty employees serving the Portland metro and Southwest Washington. ADU work sits inside a broader practice that also covers kitchen, bathroom, basement, and whole-home renovations.

Address: 18675 Willamette Dr. West Linn, OR 97068

Facebook: https://www.facebook.com/LamontBros

Hammer & Hand

Hammer & Hand was founded in Portland in 1995 by two Reed College graduates and has become a Passive House specialist; co-founder Sam Hagerman previously served as president of the Passive House Alliance US. The team built the Super-Efficient ADU in Portland's Concordia neighborhood using Passive House principles.

Address: 1011 SE Lincoln St, Portland, OR 97214, USA

Facebook: https://www.facebook.com/HammerAndHand

Neil Kelly

Neil Kelly was founded in Portland in 1947 by Neil B. Kelly with a $100 investment, and the Kelly family still owns the company, which now operates design centers in Portland, Eugene, Bend, and Seattle. It is also a certified B Corporation, and ADUs sit alongside a broad services list that includes kitchen, bath, additions, custom homes, and solar.

Address: 804 N Alberta Portland, OR 97217

Facebook: https://www.facebook.com/NeilKellyCompany/

Arciform

Arciform has been restoring Portland's historic homes and landmarks since 1997, with co-owners Anne and Richard De Wolf running the firm. The team operates an in-house workshop for custom millwork, doors, and windows, and the ADU work is shaped by deep familiarity with Portland's Historic Resource Review process.

Address: 2303 N. Randolph Ave., Portland, OR 97227

Facebook: https://www.facebook.com/arciformdesign

Mosaik Design & Remodeling

Mosaik Design & Remodeling was founded in Portland in 2002 by co-owners Erin Davis and Scott Jaworski, who together bring more than forty years of combined experience. ADUs sit alongside the firm's core kitchen, bathroom, and whole-house remodeling work, with project sizes ranging from $50,000 to $1 million.

Address: 112 S Hamilton Street, Portland, OR 97239 

Facebook: https://www.facebook.com/mosaikdesign/

Metke Remodeling

Metke Remodeling was founded in 1989 by Jeff Metke and his wife Teresa, with Jeff still personally overseeing every project after thirty-plus years. The fifteen-person Lake Oswego team has earned multiple NARI Contractor of the Year awards and Home Builders Association of Metro Portland honors, and the firm completed a 756-square-foot ADU project in 2024.

Address: 17428 SW Boones Ferry Rd Lake Oswego, OR 97035

Instagram: https://www.instagram.com/metkeremodeling/

JDL Development

JDL Development is a Portland builder founded in 1976 by brothers Joe and David Lyons, after whom the company is named. The firm focuses on high-end major remodels and new construction with project values typically running from $50,000 to $2 million, and is a longtime member of both the Home Builders Association and the Architectural Heritage Association of Portland.

Address: PO Box 17476 3347 N Lombard Street Portland, OR 97217

Instagram: https://www.instagram.com/jdl.build

Northland Design & Build

Northland Design & Build is a family business led by master carpenter Rod Loewer and designer Gina Loewer, with three generations of builders on staff and roughly fifty years of combined experience. ADU work sits inside a broader remodeling practice and is often framed around multigenerational use and in-law suites.

Address: 20000 SW Cappoen Rd Sherwood, Oregon 97140 

Facebook: https://www.facebook.com/NorthlandBuild

SLS Custom Homes

SLS Custom Homes has been licensed and bonded since 1983, and the Tigard-based family business handles ADUs alongside kitchen and bath remodels, home additions, and custom new construction. The company expanded its services into Portland in 2025.

Address: 15575 SW 74th Ave #2, Tigard, OR 97224

Instagram: https://www.instagram.com/sls.homes

Central Oregon / Bend ADU builders

Sierra James Construction

Sierra James Construction was the first builder to complete an ADU under the City of Bend's Pre-Approved Plan program, which streamlines permitting for select pre-vetted designs. The company runs a full design-build process with an in-house architect and Earth Advantage-certified ADU specialists on staff, and bills clients on a cost-plus structure with real-time project tracking.

Address: 747 SE Business Way #4, Bend, OR 97702, United States

Facebook: https://www.facebook.com/sierrajamesconstruction

PGC Building + Design

PGC Building + Design is a family-owned and operated Bend home building and renovation business that takes on attached units, detached structures, and conversions inside a broader custom home and remodeling practice. The firm describes itself as taking special interest in making old spaces new, and clients in reviews specifically credit owner Ed for the work.

Address: 62980 Boyd Acres Rd, Bend, OR 97701

Facebook: https://www.facebook.com/pgcbuilding/

GreenSavers

GreenSavers was founded in 2007 by Robert Hamerly and became, in January 2018, the first dedicated home performance contractor in the world to certify as a B Corporation. The firm has won the U.S. EPA's ENERGY STAR Contractor of the Year Award eight times, has completed more than 5,000 projects across Oregon, and has been designing and building ADUs in Central Oregon since 2019, with each project starting from a paid feasibility assessment.

Address: 3029 SE 82nd Ave Portland, OR 97266

Instagram: https://www.instagram.com/greensavers

WELBuilt Homes

WELBuilt Homes was founded in 2019 by Riley Hayes and operates out of Downtown Bend, with the company name standing for Wellness, Enrichment, and Life. Building homes with attached ADUs is the firm's stated unique selling point; Hayes also donates a portion of every custom home build to The Bethlehem Inn, a Bend homeless shelter.

Address: 835 NW Bond Street, Suite 100 Bend, OR 97701

Facebook: https://www.facebook.com/welbuilthomesoregon

Central Oregon ADU

Central Oregon ADU is a specialty division of Willis Built LLC, run by owner Austin Willis, who built his first Bend ADU back in 2002 and has completed twenty-plus since. The branch only handles accessory dwelling units.

Address: 1653 NE Watson Dr, Bend, OR 97701

Instagram: https://www.instagram.com/centraloregonadu/

Appel Design & Construction

Appel Design and Construction has been building in Central Oregon for over twenty years, with a stated emphasis on tying ADU architecture to the surrounding landscape of the Cascades and the high desert. Services center on ADUs, kitchen remodels, and bathroom remodels.

Facebook: https://www.facebook.com/appelcustomhomeremodeling/

RCO Roofing & Construction

RCO Roofing & Construction is a family-owned firm with fourteen-plus years of experience, run by owners Colin and Cortney out of Bend. ADUs sit alongside roofing, siding, remodels, and additions across Bend, Redmond, Sisters, Sunriver, La Pine, Prineville, and the rest of Central Oregon.

Facebook: https://www.facebook.com/rcoroof

Pacific ADU (Custom Home Solutions)

Pacific ADU operates as the ADU arm of Bend Custom Home Solutions, with the team emphasizing designs built for Central Oregon's climate. Services cover detached ADUs, attached units, garage conversions, design, and ADU remodels.

Address: 207 SW Columbia St, Bend, OR 97702

Facebook: https://www.facebook.com/pacific.adu/

Central Oregon Custom Homes

Central Oregon Custom Homes is a family-operated builder with a portfolio that leans rural: barndominiums, pole barns, and shop homes sit alongside ADUs, custom homes, and large remodels.

Facebook: https://www.facebook.com/davidgriffinconstruction/

Connect with the right ADU builder using Block Renovation

Finding the right contractor for an ADU depends on more than who builds them. It depends on who can build the right kind of unit for your lot, your budget, and your timeline.

Block Renovation helps with that decision. You share your project details once and get matched with vetted local contractors whose work aligns with your scope. Each bid goes through a detailed review, so gaps and inconsistencies surface before construction begins.

Scopes can be compared side by side, which makes it easier to see where your budget is going. Payments move through a progress-based system, with funds released as work is completed.

Getting the contractor match right early tends to make the rest of an ADU project more predictable, and Block helps you make that decision with better information.

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