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.
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Cronen Building Co. is an expert ADU builder specializing in granny flats, garage conversions, backyard cottages, and detached ADUs. They deliver custom accessory dwelling units that boost property value and functionality.
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Harka offers ADU design, consulting, and permitting services with 18+ years of experience. Services include feasibility reports from $785, zoning review, schematic design, construction documents, and energy modeling to reduce costs and carbon footprint.
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The Powell Group is a Portland-area custom home and ADU builder led by Mitch Powell, with 20+ years of experience. They've completed 500+ homes and 30+ ADU projects, offering expert construction from planning to completion.
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Triangle Bar Group understands that embarking on an ADU project can feel overwhelming, especially with so many options, decisions, and different Portland ADU builders to choose from. That’s where they come in.
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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 experienced ADU builders ensures a seamless integration of these units into your existing property.
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Keyser Construction Inc is a Portland, OR ADU contractor since 1996. They build detached cottages, garage conversions, basement & attic ADUs. Licensed, bonded & insured, offering free estimates and permit handling across the Portland metro area.
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Lamont Bros. Design & Construction is a Portland, Oregon ADU contractor offering full design-build services. They help homeowners plan and build accessory dwelling units, including detached ADUs, garage conversions, and JADUs for rental income or flexible living.
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Accessory Dwelling Units are a great way for Mississippi Avenue homeowners to make the most of their property. Whether you need extra space for family, a home office, or a way to generate rental income, our team at Home Services Plus handles everything—from permits to finishing touches.
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Adair Homes offers custom ADU builder solutions, including stand-alone and attached accessory dwelling units. With a six-step building process, financing via Basis Home Loans, and expert guidance, Adair simplifies new home and ADU construction.
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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.
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ADUs (Accessory Dwelling Units) are secondary housing units on residential properties. Popular in Oregon and California, they boost property value, generate rental income, and support multigenerational living. Financing options and local zoning rules apply.
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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 potential cost savings.
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Aforma Design Studio offers white-label architectural design, rendering, and preconstruction services for builders, developers, and homeowners across the US, including ADUs, renovations, and new construction, delivered under your brand.
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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.
read moreClackamas, Oregon is a unique unincorporated community located in Clackamas County, situated southeast of Portland along the Willamette River. Because Clackamas is unincorporated, ADU projects here fall under Clackamas County jurisdiction rather than a city government, which means working with experienced local ADU contractors who understand county-specific zoning codes and permitting processes is absolutely essential. This distinction makes hiring knowledgeable ADU contractors in Clackamas, Oregon a critical first step for any homeowner looking to add an accessory dwelling unit to their property.
ADU contractors operating in Clackamas must navigate the Clackamas County Zoning and Development Ordinance (ZDO). The county permits ADUs in most residential zones, including R-2.5, R-5, R-7, R-10, and R-15 zones. Key regulations that your ADU contractor must be familiar with include:
Skilled ADU contractors in Clackamas will guide homeowners through the Clackamas County Development Services permitting process. This includes submitting detailed site plans, architectural drawings, and ensuring compliance with Oregon's statewide building codes. Oregon's House Bill 2001 has also expanded ADU allowances statewide, and a qualified contractor will know how these state-level changes interact with local county rules. Permit timelines in Clackamas County can vary, so working with a contractor experienced in local processes helps avoid costly delays.
Choosing a locally experienced ADU contractor in Clackamas offers significant advantages. Local contractors understand the area's soil conditions, proximity to flood zones near the Willamette River, and the specific infrastructure considerations of unincorporated Clackamas. They also maintain established relationships with Clackamas County inspectors and planning staff, which can streamline your project considerably.
Whether you're planning a detached backyard cottage, a garage conversion, or an attached ADU, partnering with the right ADU contractor in Clackamas, Oregon ensures your project meets all county requirements while maximizing your property's value and livability.