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 · Drawings from $997 (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 25.0% — 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 95.0% 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
11 years in California residential permitting and ADU documentation. This guide was researched and verified against Beaverton's building department records and current 2026 California ADU law.
Property Eligibility
Is My Beaverton, OR Property Eligible for an ADU?
Beaverton homeowners benefit from California's state ADU law — one of the most permissive frameworks in the country since 2020. Here's what applies to your property before you start designing.
Single-Family Home
Permitted on single-family lots in Beaverton under California state law. No owner-occupancy requirement in Beaverton — you can rent both units as investment properties. Ministerial permit approval — no neighbor input or discretionary design review.
Multi-Family Property
Up to 2 detached ADUs plus JADUs (Junior ADUs) within the existing main structure are permitted under California state law. Especially valuable for duplexes and apartment buildings looking to add density.
HOA-Governed Properties
Approximately 30% of Beaverton homes are in an HOA. California law (AB 670) prohibits HOAs from banning ADUs outright, but they can impose reasonable architectural standards. 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 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. Assumes ~85% occupancy, ~30% expense ratio, 25.0% property value uplift. Consult a financial advisor before investing.
Data sources: Beaverton Development Services Department, Zillow Rental Market Reports, local appraiser records. Last verified: 2026-05-30.
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
Beaverton ADU Zoning Regulations
| Regulation | Beaverton Allowance |
|---|---|
| Max ADU Size | 800 sq ft |
| Max Height | 15 ft |
| Side Setback | 5.0 ft |
| Rear Setback | 5.0 ft |
| 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 |
Data verified recently. Always confirm with the Building Division before designing.
Beaverton Permit Process
Beaverton ADU Permit Timeline & Fees
ℹ Timeline and fee estimates are based on California 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
$997 – $1,997
- ✓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
Transparent Pricing
Beaverton ADU Drawing Costs — Compared
What homeowners typically pay for permit-ready ADU drawings in Beaverton, by service type:
| Service Type | Price Range | Turnaround | Customization |
|---|---|---|---|
| Local Architect | $3,000 – $8,000 | 4–8 weeks | Fully custom |
| Build With A Plan · Starter | $997 | 10 days | Standard |
| Build With A Plan · Standard | $1,497 | 10 days | Standard |
| Build With A Plan · Premium | $1,997 | 7 days | Enhanced |
- ✓Site plan
- ✓Floor plans
- ✓All 4 elevations
- ✓Electrical plan
- ✓Title 24 energy 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 7-day turnaround
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 real project outcomes from clients who used our permit-ready drawing sets across California.
"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."
Client first names and last initials only. Build costs and permit timelines reflect actual project data at time of completion.
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
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 included in the permit set? +
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
Start Your Beaverton ADU Today
Permit-ready drawings from $997. Delivered in 10 business days. Designed for Beaverton's building department. 14-day money-back guarantee.
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