ADU Construction in Beaverton, OR
Looking for accessory dwelling units, garage conversions and in-law suites in Beaverton, OR? Call Global Home Views and we connect your project with a contractor who does this work. Accessory dwelling units built to code - detached builds, garage conversions and basement suites - from feasibility and zoning through final occupancy. Beaverton has a mixed housing stock: 42% detached houses, 11% attached or townhouse units and 38% in buildings of five or more units.
- Local permit knowledge
- Clear change-order process
- Licensed and insured contractors only
- Written scope before work starts
ADU Construction cost in Beaverton
Typical Beaverton range: $100,300 - $365,800 per unit. Reflects Oregon labor and material costs. Estimate for planning, not a quote - call (844) 624-3161 for a written scope.
An ADU is a zoning project before it is a construction project. Setbacks, lot coverage, parking relief, owner-occupancy rules and utility capacity decide what can legally go on your lot, and they vary street by street.
Months of persistent damp with little drying time make ventilation and drainage planes the difference between a sound assembly and rot.
Garage conversions read as the cheap route and often are, but the slab usually sits below the required floor height and lacks a moisture barrier, so the real scope includes the floor system most quotes leave out.
What the job includes
- Zoning and feasibility review
- Plan sets and permit submittal
- Detached, attached and garage conversions
- Separate utility metering
- Kitchen and bath rough-in
- Final inspection and occupancy sign-off
Homes in Beaverton and adu construction work
Public figures for the city of Beaverton in Washington County, not the metro, and the general practice that follows.
Beaverton has a mixed housing stock: 42% detached houses, 11% attached or townhouse units and 38% in buildings of five or more units.1 On a mixed stock, feasibility turns on the individual lot - detached houses on larger parcels are the usual candidates; attached homes rarely qualify. Building permits in Beaverton are normally issued by the city building department.2,3 ADU plan review and permits go through the city building department; the contractor prepares the plan set and submits it.
Owners and renters are roughly balanced in Beaverton, with 50% of occupied homes owner-occupied (63% statewide).1 Beaverton's housing is newer than the national mix: 38% of units predate 1980 against 50% nationally, and 12% date from 2010 or later.1 Beaverton sits in IECC climate zone 4C (Marine).4 In this climate zone the energy code sets wall and ceiling insulation levels that a conversion must meet.
The median owner-occupied home in Beaverton is valued at $569,800 (ACS), above the Oregon median of $477,600.1 Home values above the state median tend to support fuller scopes; the written scope should still separate must-do from nice-to-have. Heating dominates the year: about 4,830 heating degree days against 275 cooling degree days (base 65°F).5,6 In a heating-led climate, insulation and air sealing carry most of the energy-code weight for any work that opens the envelope.
| Before 1940 | 2.2% |
|---|---|
| 1940-1959 | 5.4% |
| 1960-1979 | 30% |
| 1980-1999 | 33.5% |
| 2000-2009 | 17.4% |
| 2010 or later | 11.5% |
Sources and notes (6)
- U.S. Census Bureau, American Community Survey 5-year estimates (ACS 2020-2024 5-year (released 2026-01))
- U.S. Census Bureau population estimates (Vintage 2024)
- U.S. Census Bureau geographic code files (2020)
- Guide to Determining Climate Zones by County: Building America and IECC 2021 Updates (PNNL-33270) (September 2022 (IECC 2021 county map))
- NOAA NCEI U.S. Climate Normals, nearest station (1991-2020 normals (published 2021))
- NOAA NCEI normals station inventory (1991-2020)
- Climate figures are for NOAA station Portland-Hillsboro Ap, 7.7 miles from the place center; housing figures are ACS ACS 2020-2024 5-year with 90% margins of error in the source tables.
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Beaverton and nearby
Requests for Beaverton go through our national line, (844) 624-3161; we confirm whether a contractor can take the job. How a referral works.
ADU Construction nearby
Straight-line distances between place centers, not drive times. All ADU Construction in Oregon
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Open Beaverton, OR in Google MapsADU Construction questions in Beaverton
How much does adu construction cost in Beaverton, OR?
Most adu construction projects in Beaverton, OR land between $100,300 and $365,800, depending on scope, access and material grade. That is an estimated range for planning, not a quote - call (844) 624-3161 and we will scope your job properly.
Can I legally build an ADU on my lot?
That depends on your zoning, setbacks, lot coverage and utility capacity. Feasibility review comes first, before any design spend.
What kind of housing does Beaverton have?
Beaverton has a mixed housing stock: 42% detached houses, 11% attached or townhouse units and 38% in buildings of five or more units. Owners and renters are roughly balanced in Beaverton, with 50% of occupied homes owner-occupied (63% statewide). Census figures for the place itself, not the metro.
Who issues building permits in Beaverton?
Building permits in Beaverton are normally issued by the city building department. Whether a specific job needs one is decided by that office; the contractor confirms it before work starts.
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