Skip to main content Skip to content Detached and attached ADUs, garage conversions, and rental or multigenerational suites, sized to Beaverton’s larger lots. Woodland Construction Group designs and builds accessory dwelling units across the west side, one accountable team from first sketch to final walkthrough.
Planning an ADU in Beaverton, Oregon? An accessory dwelling unit turns underused yard or garage space into a fully independent home with its own kitchen, bathroom, and entrance, and Beaverton’s larger lots are ideal for a detached one. It is one of the most valuable things you can build on land you already own.
It can generate rental income, house aging parents or adult children near top west-side schools, or serve as a private home office, and the same unit can shift between those roles over the years. Because ADUs involve Beaverton and Washington County zoning, code, and full systems, the contractor you choose controls the outcome.
The right partner navigates Beaverton and Washington County ADU rules, handles permitting, protects your budget, and delivers a unit that is rentable, livable, and built to last for decades.
Review the official City of Beaverton ADU permitting requirements before you begin.An ADU in Beaverton typically runs $120,000 to $350,000+ in 2026, or about $150 to $400 per square foot, depending on type, size, and finish level. New detached backyard units, which Beaverton’s larger lots favor, sit at the higher end, while garage conversions cost less since the structure already exists.
Because Oregon law now requires Beaverton to allow ADUs and the west side has roomy lots and steady rental demand, an ADU here combines income, flexibility, and added property value, making it one of the highest-return projects on a Beaverton lot.
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An ADU is one of the few projects that earns its keep. Rented as a long-term unit, it generates steady monthly income that offsets the build cost over time, while adding significant resale value to a Beaverton property in a sought-after school district. You are building an asset, not just a room.
The 2026 Beaverton ADU is also about flexibility, and multigenerational living drives a lot of west-side demand. The same backyard unit can house aging parents close by, give adult children independence near good schools, welcome guests, or serve as a home office, then become a rental when your needs change. Few additions adapt to a family’s life the way an ADU does.
Pair that income and flexibility with Beaverton’s roomy lots and state-backed ADU allowances, and a well-built unit delivers both immediate utility and strong long-term value. Converting a daylight basement instead? See our basement remodeling page.
Woodland Construction Group – 18 Years Experience – Beaverton, Oregon
Our team of licensed contractors specializes in detached and attached ADUs across the Portland metro, navigating Beaverton’s ADU zoning, permitting, and inspections from first sketch to final walkthrough.
An ADU turns an underused corner of a roomy Beaverton lot, or a garage, into an income-producing home on land you already own, combining rental income, multigenerational flexibility, and added property value.
Six ADU paths show up most often across Beaverton. Each one is a fully independent dwelling, engineered to meet Beaverton and Washington County ADU code and built to last, not a converted shed.
Standalone backyard units with their own foundation, kitchen, bath, and entrance, the natural fit for Beaverton’s larger lots, designed as a true second home that maximizes privacy and rental value.
Units connected to the main house, sharing a wall but fully independent, an efficient option on Beaverton’s tighter or sloped lots.
Turning an attached or detached Beaverton garage into a legal ADU, using the structure you already have to lower cost while delivering a comfortable, code-compliant home.
Converting a daylight or walkout basement into a separate-entrance ADU, an option on Beaverton’s sloped lots, with waterproofing, egress, and full systems engineered for the climate.
Units designed to meet Beaverton code as fully independent dwellings, so they are legally rentable and generate steady income that offsets the build over time.
Comfortable, accessible suites for aging parents or adult children, the multigenerational setup many west-side families want, giving everyone independence and privacy while keeping family close.
How We Work
One team, one contract, from the first measurement to the final walkthrough, with no handoffs between designer, builder, and trades: design and 3D layouts, material selection, permitting and inspections, careful demolition, licensed construction, and a final walkthrough, all backed by our 1-year craftsmanship warranty.
See our full design-build processA look at the detached backyard and attached accessory dwelling units we build across Beaverton.
Walk through every line that shapes the number, from foundation and systems to kitchen, bath, and finishes, with a calculator built on real west-side ADU project data.
We built the ADU so my mother could live close to us while still having her own space. The layout is compact, but it does not feel small. She has privacy, a full kitchen, and everything she needs on one level.
The permitting process was the part we understood the least. Tyrone explained what was required, kept us updated, and helped us work through the questions that came up. We felt much more comfortable having one team involved from planning through construction.
Our garage had mostly become a storage room, so converting it into a small apartment made better use of the property. The team found smart ways to include storage without making the rooms feel crowded. The finished space is brighter and more comfortable than we expected.
Timelines, cost, Beaverton zoning, rental income, and what to expect in 2026. If your question is not here, call us. We would rather answer it directly.
A typical Beaverton ADU takes 4 to 8 months from groundbreaking to final walkthrough, depending on type. A garage conversion can finish in 3 to 5 months, while a new detached backyard ADU with its own foundation runs 6 to 9 months once design and City of Beaverton permitting are factored in. We set a detailed timeline during design and hold to it.
In Beaverton, ADUs run $120,000 to $350,000+ in 2026 depending on type, size, and finish level. As a rule of thumb, expect $150 to $400 per square foot, with new detached backyard units at the higher end and garage conversions typically lower since the structure already exists. You get an itemized estimate during the consultation phase so you can see exactly where the budget goes.
Under Oregon law, Beaverton allows accessory dwelling units on most residential lots, subject to size limits, setbacks, height, and parking rules that vary by zone, with some addresses governed by Washington County instead. Detached, attached, and conversion ADUs each have their own requirements. We assess your lot during the consultation and handle all zoning review, permitting, and inspections.
Yes. A legal ADU can be rented as a long-term unit, which generates steady income and helps offset the build cost over time. Many Beaverton homeowners build an ADU to house family now, near good schools, and rent it later. We design the unit to meet Beaverton or Washington County code as a fully independent dwelling so it is rentable and adds lasting value to your property.
We build new detached ADUs (standalone backyard units, ideal on Beaverton’s larger lots), attached ADUs connected to the main house, garage conversions, and daylight-basement conversions. Each is a fully independent dwelling with its own kitchen, bathroom, and entrance. We help you choose the type that best fits your lot, budget, and goals, whether that is rental income, multigenerational living, or a home office.
Yes. A well-built ADU adds significant resale value and creates an income-producing asset, a strong combination in Beaverton’s sought-after, school-driven housing market. It also adds flexibility: the same unit can house aging parents, adult children, guests, or tenants over the years. That mix of income, flexibility, and added value is why ADUs are one of the highest-return projects on the west side.
Yes. An ADU turns underused yard or garage space into an independent dwelling that can generate rental income, house family, and raise your property value, all on land you already own. With Beaverton’s roomy lots, state-backed ADU allowances, and steady rental demand, building one is one of the smartest long-term investments a Beaverton homeowner can make in 2026.
Built for Beaverton
Oregon law now requires cities like Beaverton to allow accessory dwelling units on most residential lots, and the west side is well suited to them: the bigger lots of Murray Hill, Sexton Mountain, Cooper Mountain, and Five Oaks give a detached backyard ADU room to sit with real privacy and parking, something inner-city lots rarely offer. Add strong multigenerational demand from families who want parents or adult children close by, and a Beaverton ADU makes practical and financial sense.
Beaverton ADUs are permitted and inspected through the City of Beaverton Building Division, with some unincorporated addresses governed by Washington County standards instead, and the size, setback, height, and parking rules vary by location. We confirm the right jurisdiction and what your lot allows up front, recommend whether a detached unit, garage conversion, or attached suite fits best, and manage the full approval process so the unit is legal, rentable, and built to last.
Family-owned and based in Northwest Portland, we build ADUs across the city and the west-side suburbs.
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Book a free in-home consultation. We will assess your lot and zoning, talk through ADU type, layout, and budget, and give you an itemized estimate, with no pressure and no handoffs.
