ADU Design Resource · Edmonds, WA
The Complete Guide to
Building an ADU in Edmonds, WA
Everything Edmonds 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 Edmonds, WA ADUs
Market Context
Edmonds has a median home value of $530,000. Adding an ADU typically increases that by 35% — approximately $185,500 in added equity. A 1-bedroom ADU in Edmonds rents for approximately $1,693/month in the Snohomish County rental market , yielding a 5.2% cap rate on the investment. Occupancy averages 92% in this market.
Top Edmonds neighborhoods for ADU investment include Perrinville - Seaview, Westgate, Chase Lake, East Edmonds, Pine Park. Larger, treed lots and single‑family parcels make Perrinville ideal for detached ADUs. A high concentration of 1950s–60s single‑family homes near transit and services supports ADU conversions and rentals.
Permit Process
Permit applications are reviewed by the Planning and Development , with a plan check timeline of approximately 8 weeks. Permit fees in Edmonds range from $11,382 to $21,636 depending on project scope. Design review: Yes - in historic districts only
Edmonds 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 Edmonds's building department records and current 2026 California ADU law.
Property Eligibility
Is My Edmonds, WA Property Eligible for an ADU?
Edmonds 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 Edmonds under California state law. No owner-occupancy requirement in Edmonds — 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 Edmonds 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 Edmonds'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.
Historic Districts
Yes - in historic districts only
Always verify eligibility with Planning and Development before designing.
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Edmonds ADU Return Calculator — Built With 2026 Local Data
Pre-loaded with verified Edmonds 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, 35% property value uplift. Consult a financial advisor before investing.
Data sources: Edmonds Development Services Department, Zillow Rental Market Reports, local appraiser records. Last verified: 2026-05-30.
Local Market Data
Top Edmonds Neighborhoods for ADU Investment
Perrinville - Seaview
Larger, treed lots and single‑family parcels make Perrinville ideal for detached ADUs.
Westgate
A high concentration of 1950s–60s single‑family homes near transit and services supports ADU conversions and rentals.
Chase Lake
Central residential neighborhood with good access to SR‑99 and local retail—strong single‑family lot opportunity for ADUs.
East Edmonds
Inland, versatile single‑family parcels with lower median values make East Edmonds cost‑effective for ADU builds.
Pine Park
Established residential area near Fifth Avenue South with single‑family density and neighborhood amenities that attract renters.
Downtown Edmonds
Strong rental demand from waterfront/ferry access, walkable shops and events increases ADU income potential despite smaller lot footprints.
Sherwood Forest
Suburban single‑family lots and family demand make Sherwood Forest well‑suited for detached ADUs.
Esperance
Lower median prices and mid‑century lots near Lake Ballinger offer affordable ADU development opportunities.
Edmonds Bowl
Scenic residential area with single‑family homes where owners may add ADUs for rental income or multigenerational use.
Talbot Park
High‑value coastal neighborhood where ADUs are attractive for ‘aging in place’ and premium short‑term or long‑term rentals.
Edmonds ADU Market at a Glance
Local Zoning Rules
Edmonds ADU Zoning Regulations
| Regulation | Edmonds Allowance |
|---|---|
| Max ADU Size | 1,200 sq ft |
| Max Height | 24 ft |
| Side Setback | 5 ft |
| Rear Setback | 10 ft |
| Owner Occupancy | Not required |
| Short-Term Rental | Permitted |
| Coastal Overlay | Yes — CDP may be required |
| Design Review | Yes - in historic districts only |
| HOA Prevalence | 15% of properties |
Data verified recently. Always confirm with the Planning and Development before designing.
Edmonds Permit Process
Edmonds ADU Permit Timeline & Fees
ℹ Timeline and fee estimates are based on California state averages. Actual Edmonds data coming soon.
Local Financing Resources
Local ADU Lenders in Edmonds
These lenders offer HELOC, construction, and renovation loans for ADU projects in Snohomish County. Compare terms before committing.
Offers HELOCs up to 90% LTV with a 10-year draw period, though they do not offer separate construction loans.
Visit Lender ↗Provides mortgage and home equity products for renovations in Washington through their Edmonds branch.
Visit Lender ↗Offers HELOCs up to $500,000 with interest-only payments during a 10-year draw period and fixed-rate options.
Visit Lender ↗Explicitly lists accessory dwelling units (ADUs) as eligible for their construction and major renovation financing.
Visit Lender ↗Specialty ADU marketplace offering HELOCs and renovation loans based on 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 Edmonds
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 Edmonds 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 Planning and 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 Planning and Development. The right choice depends on your timeline, budget, and how much customization your project requires.
Drawing Package Details
What's Included in Your Edmonds ADU Package
Engineered for WA Permit Approvals
Transparent Pricing
Edmonds ADU Drawing Costs — Compared
What homeowners typically pay for permit-ready ADU drawings in Edmonds, 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 Edmonds'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 Planning and 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.
"Drawings were ready on day 9. I submitted to the city the same week. The reviewer called them the cleanest ADU set he'd seen in months."
"Our garage conversion is now renting at $1,850/month. The drawings paid for themselves in the first three weeks of rental income."
"Our JADU was the easiest part of the whole project. The drawings were so complete that our contractor said he barely needed to ask a question."
Client first names and last initials only. Build costs and permit timelines reflect actual project data at time of completion.
Building Code
Edmonds Climate Zone & Energy Code
Washington State Energy Code (WSEC) — 2021 WSEC Residential (effective March 15, 2024): a state-adopted energy code based on the 2021 IECC that sets prescriptive and performance-based energy-efficiency requirements for residential buildings (including ADUs).
Compare Cities
Edmonds vs. Nearby Washington Cities
| City | Build Cost/sqft | Permit Fees | 1BR ADU Rent | Cap Rate | Drawings |
|---|---|---|---|---|---|
| Edmonds ← you | $300 | $11,382+ | $1,693/mo | 5.2% | From $997 |
| Everett | $375 | $3,458+ | $1,450/mo | 6.0% | View → |
| Marysville | $320 | $3,000+ | $1,750/mo | 5.2% | View → |
| Lake Stevens | $300 | $7,997+ | $1,450/mo | 5.2% | View → |
| Lynnwood | $500 | $3,000+ | $1,836/mo | 3.2% | View → |
Frequently Asked
Edmonds ADU Questions
How much does it cost to build an ADU in Edmonds? +
What is the maximum ADU size allowed in Edmonds? +
How long does the ADU permit process take in Edmonds? +
Do I need owner-occupancy to build an ADU in Edmonds? +
What's the rental income potential for an ADU in Edmonds? +
How much does it cost to get ADU drawings in Edmonds? +
What drawings are included in the permit set? +
Can I convert my garage to an ADU in Edmonds? +
Does Edmonds have a coastal overlay for ADUs? +
What neighborhoods in Edmonds are best for ADU investment? +
Is Edmonds ADU-friendly? +
How much will an ADU increase my property value in Edmonds? +
Can I use my Edmonds ADU as a short-term rental (Airbnb / VRBO)? +
Does Edmonds's seismic zone affect ADU construction requirements? +
Where do I submit ADU plans in Edmonds? +
More Services in Edmonds
Start Your Edmonds ADU Today
Permit-ready drawings from $997. Delivered in 10 business days. Designed for Edmonds's building department. 14-day money-back guarantee.
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