ADU Design Resource · Burien, WA
The Complete Guide to
Building an ADU in Burien, WA
Everything Burien 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 Burien, WA ADUs
Market Context
Burien has a median home value of $440,000. Adding an ADU typically increases that by 28% — approximately $123,200 in added equity. A 1-bedroom ADU in Burien rents for approximately $1,595/month in the King County rental market , yielding a 6.8% cap rate on the investment. Occupancy averages 96% in this market.
Top Burien neighborhoods for ADU investment include Northeast Burien, Sunnydale, Cedarhurst, Five Corners, Gregory Heights. High single-family density, affordable median price, and good transit access to SeaTac/Seattle make this ideal for ADUs. Close to SeaTac and transit with many single-family lots suitable for detached ADUs.
Permit Process
Permit applications are reviewed by the Department of Community Development , with a plan check timeline of approximately 9.3 weeks. Permit fees in Burien range from $3,601 to $4,261 depending on project scope. Design review: Yes - in Old Burien overlay and in R-4/R-5/Mixed-Use zones (administrative design review); otherwise No (ministerial building permit)
Burien properties within the Coastal Overlay Zone require a Coastal Development Permit (CDP) in addition to standard building permits. CDPs add 2–6 months to the permit timeline and require compliance with both local ordinances and California Coastal Commission standards.
11 years in California residential permitting and ADU documentation. This guide was researched and verified against Burien's building department records and current 2026 California ADU law.
Property Eligibility
Is My Burien, WA Property Eligible for an ADU?
Burien 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 Burien under California state law. No owner-occupancy requirement in Burien — 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 15% of Burien 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.
Coastal Zone Properties
Properties within Burien's Coastal Overlay Zone require a Coastal Development Permit (CDP) in addition to standard building permits. This adds 2–6 months to the timeline. Our drawings flag coastal requirements and meet both local and Coastal Commission standards.
Always verify eligibility with Department of Community Development before designing.
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Burien ADU Return Calculator — Built With 2026 Local Data
Pre-loaded with verified Burien 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, 28% property value uplift. Consult a financial advisor before investing.
Data sources: Burien Development Services Department, Zillow Rental Market Reports, local appraiser records. Last verified: 2026-05-30.
Local Market Data
Top Burien Neighborhoods for ADU Investment
Northeast Burien
High single-family density, affordable median price, and good transit access to SeaTac/Seattle make this ideal for ADUs.
Sunnydale
Close to SeaTac and transit with many single-family lots suitable for detached ADUs.
Cedarhurst
Affordable homes near the airport and strong commuter rental demand favor ADU rentals.
Five Corners
Central location with many single-family parcels and proximity to downtown Burien amenities.
Gregory Heights
Predominantly single-family lots and larger yards that can accommodate detached ADUs.
Lake Burien
Larger lots and high local rental appeal near the lake support ADU income potential.
Seahurst
Strong demand for housing near parks and shoreline plus sizable lots for detached ADUs.
Salmon Creek
Scenic, single-family neighborhood with ample lot space for detached ADUs and rental demand.
Maplewild
Large properties and desirable location near Seahurst Park make ADUs attractive for owners/renters.
Three Tree Point
High-value waterfront lots are large enough for detached ADUs and command strong rental interest.
Burien ADU Market at a Glance
Local Zoning Rules
Burien ADU Zoning Regulations
| Regulation | Burien Allowance |
|---|---|
| Max ADU Size | 1,000 sq ft |
| Max Height | 35 ft |
| Side Setback | 5 ft |
| Rear Setback | 5 ft |
| Owner Occupancy | Not required |
| Short-Term Rental | Permitted |
| Coastal Overlay | Yes — CDP may be required |
| Design Review | Yes - in Old Burien overlay and in R-4/R-5/Mixed-Use zones (administrative design review); otherwise No (ministerial building permit) |
| HOA Prevalence | 15% of properties |
Data verified recently. Always confirm with the Department of Community Development before designing.
Burien Permit Process
Burien ADU Permit Timeline & Fees
Local Financing Resources
Local ADU Lenders in Burien
These lenders offer HELOC, construction, and renovation loans for ADU projects in King County. Compare terms before committing.
Offers construction-to-permanent loans up to $3 million and HELOCs with variable APRs, with a dedicated advisor for the Burien area.
Visit Lender ↗Provides two-time-close construction financing for major renovations and HELOCs with a maximum LTV of 70% for non-owner occupied properties.
Visit Lender ↗Offers HELOCs with a 10-year draw period and revolving credit lines suitable for phased ADU renovation projects.
Visit Lender ↗A community bank with a Burien branch offering specialized home construction loans for building from the ground up or major remodels.
Visit Lender ↗A specialty fintech platform that partners with credit unions to offer renovation-specific loans based on the home's after-renovation value.
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 Burien
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 Burien 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 Department of Community Development.
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 Department of Community Development. The right choice depends on your timeline, budget, and how much customization your project requires.
Drawing Package Details
What's Included in Your Burien ADU Package
Engineered for WA Permit Approvals
Transparent Pricing
Burien ADU Drawing Costs — Compared
What homeowners typically pay for permit-ready ADU drawings in Burien, 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
- ✓Coastal Zone supplement
- ✓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 Burien's building department requirements and WA code. Delivered in 10 business days.
Submit to Your City
Download your complete drawing package and submit directly to Department of Community Development. 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
Burien Climate Zone & Energy Code
Washington State Energy Code (WSEC): ADUs must comply with the residential WSEC requirements using the prescriptive or performance compliance paths as they are treated as residential units under the state energy code.
Compare Cities
Burien vs. Nearby Washington Cities
Frequently Asked
Burien ADU Questions
How much does it cost to build an ADU in Burien? +
What is the maximum ADU size allowed in Burien? +
How long does the ADU permit process take in Burien? +
Do I need owner-occupancy to build an ADU in Burien? +
What's the rental income potential for an ADU in Burien? +
How much does it cost to get ADU drawings in Burien? +
What drawings are included in the permit set? +
Can I convert my garage to an ADU in Burien? +
Does Burien have a coastal overlay for ADUs? +
What neighborhoods in Burien are best for ADU investment? +
Is Burien ADU-friendly? +
How much will an ADU increase my property value in Burien? +
Can I use my Burien ADU as a short-term rental (Airbnb / VRBO)? +
Does Burien's seismic zone affect ADU construction requirements? +
Where do I submit ADU plans in Burien? +
More Services in Burien
Start Your Burien ADU Today
Permit-ready drawings from $997. Delivered in 10 business days. Designed for Burien's building department. 14-day money-back guarantee.
Get My ADU Drawings →Questions? Your coordinator responds within 4 business hours.