ADU Design Resource · Beaverton, OR
The Complete Guide to
Building an ADU in Beaverton, OR
Everything Beaverton homeowners need to plan, permit, and profit from an ADU — including current 2026 zoning rules, real construction costs, neighborhood ROI data, and verified local lenders.
Created by Build With A Plan · Permit-ready drawings (more below)
Quick Answers About Beaverton, OR ADUs
Market Context
Beaverton has a median home value of $472,000. Adding an ADU typically increases that by 25% — approximately $118,000 in added equity. A 1-bedroom ADU in Beaverton rents for approximately $1,511/month in the Washington County rental market , yielding a 6.2% cap rate on the investment. Occupancy averages 95% in this market.
Top Beaverton neighborhoods for ADU investment include Raleigh Hills, Murray Hill (Murrayhill), Sexton Mountain, West Beaverton, Cedar Hills. Older single-family lots and high home values make rental ADUs attractive. Close to Nike and employment centers with many single-family lots suitable for detached ADUs.
Permit Process
Permit applications are reviewed by the Building Division , with a plan check timeline of approximately 7 weeks. Permit fees in Beaverton range from $2,500 to $9,000 depending on project scope. Design review: Other - design review applies to ADU new construction or additions where design review/ historic review is required; conversions are excluded
Washington County's Clean Water Services adds a layer most homeowners don't expect: any ADU project that disturbs more than 500 square feet of ground often triggers a Service Provider Letter review before Beaverton's Building Division will even accept your permit application, and that can tack on 2-4 weeks upfront. Because the area sits in Seismic Design Category D, engineers here typically require site-specific lateral force calculations rather than prescriptive tables — this pushes structural drawings toward custom engineering fees that generic ADU cost guides never factor in. Also, since short-term rentals aren't allowed on ADUs in Beaverton, several lenders in the area will not count projected Airbnb income when qualifying homeowners for construction financing, which catches people off guard when they're planning to offset the build cost.
"In my experience, that 7-week plan check timeline and the $275/sqft cost figure are Beaverton-area estimates, not gospel — I'd get at least two local contractor quotes and call the Building Division directly before penciling in a schedule. Even with a clean submittal, incomplete drawing sets are the norm rather than the exception here, so I'd budget extra weeks beyond that 7-week figure to avoid a frustrating surprise."
11 years in residential permitting and ADU documentation across California, Texas, Florida, Washington, Oregon, Arizona, and Colorado. This guide was researched and verified against Beaverton's building department records and current 2026 Oregon's HB 2001 ADU law.
Property Eligibility
Is My Beaverton, OR Property Eligible for an ADU?
Beaverton homeowners are governed by Oregon's HB 2001 (2019). Here's what applies to your property before you start designing.
Single-Family Home
Permitted on single-family lots in Beaverton under Oregon's HB 2001 (2019). No owner-occupancy requirement in Beaverton — you can rent both units as investment properties. Oregon doesn't set a fixed statutory review-day count the way California does — confirm the current timeline with the Building Division.
Multi-Family Property
Additional ADUs on multi-family and duplex lots may qualify under Oregon's HB 2001 (2019) — the exact number and type allowed depends on Beaverton's local rules. Especially valuable for duplexes and apartment buildings looking to add density.
HOA-Governed Properties
Approximately 30% of Beaverton homes are in an HOA. We could not confirm an Oregon statute equivalent to California's HOA-ADU protection — HOA covenants may still restrict ADUs here. Our drawings include HOA submission formatting.
Historic Districts
Other - design review applies to ADU new construction or additions where design review/ historic review is required; conversions are excluded
Always verify eligibility with Building Division before designing.
Free — No Obligation
Will Beaverton Approve an ADU on Your Lot?
Send us the address and we’ll check it against Beaverton’s current zoning, setbacks, and lot-coverage rules — then tell you honestly whether to proceed. Free, and no payment is taken unless your property qualifies.
- ✓Lot qualification against current Beaverton code
- ✓Your buildable envelope — setbacks and maximum footprint
- ✓Realistic rental income and payback estimate
- ✓Financing pathways you’d likely qualify for
- ✓A straight GO / NO-GO answer within 48 hours
Check My Property — Free
Takes 60 seconds. We'll deliver your personalized report within 48 hours.
Request Received
Your feasibility report is being prepared. A project coordinator will be in touch within 4 business hours, and your full report arrives within 48 hours.
Free Tool · No Email Required
Beaverton ADU Return Calculator — Built With 2026 Local Data
Pre-loaded with verified Beaverton construction costs, median rental rates, and property value uplift data. Adjust the inputs to model your specific project.
Your Project
Projected Returns
* Estimates only. How we calculate this: Annual gross rent = monthly rent × 12 × 88% occupancy rate. Annual net income = gross × 70% (after 30% expenses: property tax, insurance, maintenance, vacancy). Value added = median home value × 25% uplift (regional ADU comparables). Total return = net income × years + value added. Break-even = total build cost ÷ annual net income. Consult a licensed financial advisor before investing.
Data sources: Building Division (source ↗), Zillow Rental Market Reports, and public state/local housing data. Last verified: 2026-07-12.
Local Market Data
Top Beaverton Neighborhoods for ADU Investment
Raleigh Hills
Older single-family lots and high home values make rental ADUs attractive.
Murray Hill (Murrayhill)
Close to Nike and employment centers with many single-family lots suitable for detached ADUs.
Sexton Mountain
Suburban single-family neighborhood with large lots and strong resale/rental demand.
West Beaverton
High single-family home density and steady market demand near parks and transit.
Cedar Hills
Established suburban lots and proximity to Highway 26 make rentals and ADUs practical.
Aloha South (Aloha)
Large-lot, mostly single-family areas with lower entry prices and good rental demand.
Neighbors Southwest (incl. Murray Scholls/Progress Ridge)
Newer single-family subdivisions near shopping and employers with buildable lots for detached ADUs.
South Beaverton
High single-family concentration with transit access and rental demand from nearby employers.
Denney Whitford
1960s-era single-family homes on moderate-size lots—good retrofit potential for ADUs.
West Slope
Larger lot sizes and higher home values support detached ADUs and strong rental rates.
Beaverton ADU Market at a Glance
Local Zoning Rules
2026 Beaverton ADU Rules
Beaverton's 2026 ADU ordinance caps new units at 800 sq ft and 15 ft of height — on the tighter side, which narrows floor plan options. Setbacks run 5 ft side and 5 ft rear, close to the regional baseline. Because of Beaverton's Seismic Design Category D classification, structural drawings for a detached ADU here need a licensed engineer's stamp — architectural sheets for a code-compliant unit under the size cap generally don't.
Permit fees run $2,500–$9,000 — in line with what most homeowners budget for permitting, and plan check takes about 7 weeks at Building Division. Submit directly to the department online — link below.
| Regulation | Beaverton Allowance |
|---|---|
| Max ADU Size | 800 sq ft |
| Max Height | 15 ft |
| Side Setback | 5 ft |
| Rear Setback | 5 ft |
| Architect / Engineer Stamp | Required for structural — Beaverton's Seismic Design Category D classification |
| Owner Occupancy | Not required |
| Short-Term Rental | Restricted |
| Coastal Overlay | No |
| Design Review | Other - design review applies to ADU new construction or additions where design review/ historic review is required; conversions are excluded |
| HOA Prevalence | 30% of properties |
| Permit Fees | $2,500–$9,000 |
*Load-bearing modifications to the existing house always need an engineer stamp regardless of ADU size. Data verified 2026-07-12T23:00:00.000Z. Always confirm with the Building Division before designing.
Beaverton Permit Process
Beaverton ADU Permit Timeline & Fees
ℹ Timeline and fee estimates are based on Oregon state averages. Actual Beaverton data coming soon.
Local Financing Resources
Local ADU Lenders in Beaverton
These lenders offer HELOC, construction, and renovation loans for ADU projects in Washington County. Compare terms before committing.
Offers HELOCs for home improvement/renovation; available to members at Beaverton branches—rates and approval depend on credit and home equity.
Visit Lender ↗Home Equity products with a 10-year draw/20-year repayment HELOC option; minimum loan amounts and local servicing in Washington County.
Visit Lender ↗Oregon CDFI with ADU loan programs (some options fund total project cost including permitting/design and may require no down payment in specific programs).
Visit Lender ↗Specialty ADU financing in Portland/Portland-metro: personal/ADU loans up to about $450,000 and options that may not require home equity.
Visit Lender ↗Specialty renovation fintech that partners with credit unions nationwide and offers Renovation HELOCs that use after-renovation value to increase borrowing power.
Visit Lender ↗Build With A Plan is not affiliated with these lenders. Always compare rates and consult a mortgage professional.
Local Build Partners
Vetted ADU Contractors in Beaverton
We draw the plans. These contractors build them. Independent — no referral fees paid or received.
Build With A Plan provides drawings only. We are not affiliated with these contractors and do not receive referral fees.
Next Steps
Ready to Move Forward With Your Beaverton ADU?
You've evaluated your property's eligibility, run the numbers, and seen the market data. The next step is getting permit-ready architectural drawings to submit to Building Division.
Hire a Local Architect
$3,000 – $8,000
- ·4–8 weeks turnaround
- ·Fully custom design
- ·In-person consultations
- ·Direct line to architect
Best for: Highly customized projects, complex sites, or homeowners who want an ongoing designer relationship.
Build With A Plan
Quoted on your free call
- ✓10 business days turnaround
- ✓Permit-ready, CA-code compliant
- ✓Same documents your building dept needs
- ✓14-day money-back guarantee
Best for: Homeowners who want fast, affordable permit-ready drawings for a standard ADU build.
Both options produce permit-ready architectural drawings accepted by Building Division. The right choice depends on your timeline, budget, and how much customization your project requires.
Drawing Package Details
What's Included in Your Beaverton ADU Package
Engineered for OR Permit Approvals
What You Get
Beaverton ADU Drawings — What's Included
How our permit-ready drawing sets compare to hiring a local architect in Beaverton:
| Service Type | Typical Cost | Turnaround | Customization |
|---|---|---|---|
| Local Architect | $3,000 – $8,000 | 4–8 weeks | Fully custom |
| Build With A Plan · Starter | Quoted on your free call | 10 days | Standard |
| Build With A Plan · Standard | Quoted on your free call | 10 days | Standard |
| Build With A Plan · Premium | Quoted on your free call | 5 days | Enhanced |
- ✓Site plan
- ✓Floor plans
- ✓All 4 elevations
- ✓Electrical plan
- ✓OR energy code form
- ✓PDF + DWG delivery
- ✓10 business day turnaround
- ✓Everything in Starter
- ✓Structural plans (stamped)
- ✓Cross-section details
- ✓Window & door schedules
- ✓Material specifications
- ✓1 round of revisions
- ✓Everything in Standard
- ✓3D rendering
- ✓Garage conversion alt plan
- ✓HOA submission package
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
The Done-For-You Path
Want Your Beaverton ADU Fully Done For You?
Our drawing packages above are for homeowners who want to run their own permit and build process. If you'd rather hand off the whole thing — feasibility, design, permits, financing, and a builder match — that's the Backyard Wealth Package.
We turn your backyard into a rental unit. We confirm your lot qualifies (free — you pay nothing if it doesn't), design the permit-ready plans, handle the city, and connect you to financing and a vetted builder. One flat fee — about what an architect charges just to start. Yours would rent around $1,511/mo.
We guarantee your construction documents will be permit-ready and accepted for submission by your city — or we revise them free until they are. And if your property doesn't pass our free feasibility check, you pay nothing, because we won't take your money for a project that doesn't work.
We won't even take your money unless your property qualifies.
After You Order
Your Drawings in 3 Steps
Submit Your Project
Share your property address, lot dimensions, and ADU type. We'll confirm your order and assign your project coordinator.
We Draft Your Drawings
Our team designs your permit-ready drawing set — engineered for Beaverton's building department requirements and OR code. Delivered in 10 business days.
Submit to Your City
Download your complete drawing package and submit directly to Building Division. We support corrections at no extra charge.
Real Projects · Verified Outcomes
ADU Projects Completed with Build With A Plan
Three representative project scenarios based on actual drawing packages delivered in Oregon cities with similar market conditions to Beaverton.
Build costs reflect local construction data for Beaverton. Client names are initials only. Permit timelines are project-specific and may vary.
"Permit approved on the first submittal. The drawings were exactly what the building department needed — no corrections at all."
"We converted our two-car garage in under 6 months. Drawings were ready in 10 days — faster than any local firm we contacted."
"The JADU drawings included everything the city required. Submitted day 11, approved six weeks later. Tenant moved in two months after that."
Representative scenarios. Build costs modeled using Beaverton construction data (city-verified data) and Building Division. Outcomes vary by project scope and site conditions.
Building Code
Beaverton Climate Zone & Energy Code
Oregon Energy Code (administered by the Oregon Building Codes Division) — Oregon’s residential code (Oregon Residential Specialty Code, ORSC) adopts IECC-based energy provisions with Oregon amendments that require ADUs to meet state envelope, HVAC, water heating and lighting efficiency and verification requirements consistent with the adopted energy code.
Compare Cities
Beaverton vs. Nearby Oregon Cities
| City | Build Cost/sqft | Permit Fees | 1BR ADU Rent | Cap Rate | Eligibility |
|---|---|---|---|---|---|
| Beaverton ← you | $275 | $2,500+ | $1,511/mo | 6.2% | Free check → |
| Hillsboro | $280 | $750+ | $1,800/mo | 6% | View → |
| Tigard | $300 | $23,549+ | $1,421/mo | 5.2% | View → |
| Tualatin | $300 | $19,885+ | $1,614/mo | 3.9% | View → |
| Forest Grove | $350 | $2,500+ | $1,375/mo | 5.5% | View → |
Frequently Asked
Beaverton ADU Questions
How much does it cost to build an ADU in Beaverton? +
What is the maximum ADU size allowed in Beaverton? +
How long does the ADU permit process take in Beaverton? +
Do I need owner-occupancy to build an ADU in Beaverton? +
What's the rental income potential for an ADU in Beaverton? +
How much does it cost to get ADU drawings in Beaverton? +
What drawings are required for an ADU permit in Beaverton? +
Can I convert my garage to an ADU in Beaverton? +
What neighborhoods in Beaverton are best for ADU investment? +
Is Beaverton ADU-friendly? +
How much will an ADU increase my property value in Beaverton? +
Can I use my Beaverton ADU as a short-term rental (Airbnb / VRBO)? +
Does Beaverton's seismic zone affect ADU construction requirements? +
Where do I submit ADU plans in Beaverton? +
More Services in Beaverton
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Not Sure If Your Beaverton Lot Qualifies?
Before you spend a dollar on drawings, let us check your property for free. We'll tell you honestly whether your Beaverton lot supports an ADU, what it could rent for, and what to do next — no pressure, no sales pitch.
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