ADU Design Resource · Anacortes, WA
The Complete Guide to
Building an ADU in Anacortes, WA
Everything Anacortes 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 Anacortes, WA ADUs
Market Context
Anacortes has a median home value of $600,000. Adding an ADU typically increases that by 28% — approximately $168,000 in added equity. A 1-bedroom ADU in Anacortes rents for approximately $1,950/month in the Skagit County rental market , yielding a 3.5% cap rate on the investment. Occupancy averages 96% in this market.
Top Anacortes neighborhoods for ADU investment include Old Town, Whistle Lake, Central Anacortes, Skyline, Rock Ridge. Walkable historic core steps from Island Hospital, downtown Commercial Avenue jobs, and the Washington State Ferries terminal generate strong year-round rental demand from healthcare and ferry workers. Large (often 1+ acre) wooded lots with duplex/triplex-friendly zoning and forest-adjacency make it the easiest area to site a detached ADU at scale.
Permit Process
Permit applications are reviewed by the Planning, Community, and Economic Development (PCED) . Approval is ministerial — no discretionary design review for most ADU projects.
Anacortes 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 applicable state coastal zone management standards.
Because much of Anacortes sits within the shoreline jurisdiction, many ADU lots need a Shoreline Substantial Development or Coastal Development Permit review layered on top of the standard building permit — this alone can tack on several extra weeks of PCED review since it isn't a simple over-the-counter approval. Add in Seismic Zone D requirements, which often mean engineered shear wall details and extra foundation anchoring that a standard prefab ADU plan won't already include, and your engineer will likely need to redesign specs specifically for this soil and quake profile. Since short-term rentals aren't allowed here, don't count on Airbnb income to justify the build cost — PCED will also check that your ADU is deed-restricted to long-term occupancy before final sign-off.
"In my experience, both the timeline and cost-per-square-foot figures here are unverified Washington state-level estimates rather than Anacortes-specific numbers, so I'd strongly encourage getting quotes from local contractors and calling PCED directly before budgeting; on top of that, since your parcel falls in the coastal overlay, expect the CDP (Shoreline Substantial Development/Conditional Use) review to add several months on top of standard plan check, which is a step I've seen catch first-time applicants off guard more than almost anything else."
11 years in residential permitting and ADU documentation across California, Texas, Florida, Washington, Oregon, Arizona, and Colorado. This guide was researched and verified against Anacortes's building department records and current 2026 Washington's HB 1337 ADU law.
Property Eligibility
Is My Anacortes, WA Property Eligible for an ADU?
Anacortes homeowners are governed by Washington's HB 1337 (2023). Here's what applies to your property before you start designing.
Single-Family Home
Permitted on single-family lots in Anacortes under Washington's HB 1337 (2023). No owner-occupancy requirement in Anacortes — you can rent both units as investment properties. The state requires administrative (non-discretionary) review, though it doesn't set a fixed statutory day-count the way California's law does — confirm the current timeline with the Planning, Community, and Economic Development (PCED).
Multi-Family Property
Additional ADUs on multi-family and duplex lots may qualify under Washington's HB 1337 (2023) — the exact number and type allowed depends on Anacortes's local rules. Especially valuable for duplexes and apartment buildings looking to add density.
HOA-Governed Properties
Approximately 26% of Anacortes homes are in an HOA. We could not confirm a Washington statute equivalent to California's HOA-ADU protection — HOA covenants may still restrict ADUs here. Our drawings include HOA submission formatting.
Coastal Zone Properties
Properties within Anacortes'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 applicable state coastal zone management standards.
Always verify eligibility with Planning, Community, and Economic Development (PCED) before designing.
Free — No Obligation
Will Anacortes Approve an ADU on Your Lot?
Send us the address and we’ll check it against Anacortes’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 Anacortes 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
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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.
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Anacortes ADU Return Calculator — Built With 2026 Local Data
Pre-loaded with verified Anacortes 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 × 28% 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: Planning, Community, and Economic Development (PCED) (source ↗), Zillow Rental Market Reports, and public state/local housing data. Last verified: 2026-08-15.
Local Market Data
Top Anacortes Neighborhoods for ADU Investment
Old Town
Walkable historic core steps from Island Hospital, downtown Commercial Avenue jobs, and the Washington State Ferries terminal generate strong year-round rental demand from healthcare and ferry workers.
Whistle Lake
Large (often 1+ acre) wooded lots with duplex/triplex-friendly zoning and forest-adjacency make it the easiest area to site a detached ADU at scale.
Central Anacortes
Practical mid-priced SFH stock within minutes of Island Hospital, the school district, and downtown employers, ideal for workforce tenant demand.
Skyline
Median lot size of ~9,147 sq ft combined with marina/ferry-terminal proximity creates strong short-term and long-term rental pull from marine workers.
Rock Ridge
Newer single-family subdivisions with modern infrastructure and family-oriented layouts produce steady rental demand from Skagit Valley College and hospital staff.
Hillcrest
Stable SFH neighborhood with quick SR-20 commuter access to the refineries and the Island Hospital corridor, supporting reliable tenant demand.
Cap Sante
Premium marina/downtown location with high waterfront rent tolerance, though hillside lots require creative detached-ADU siting.
Commercial Avenue Corridor
Mixed-use corridor with the highest walkability in the city; retail, restaurant, and ferry workers create intense demand for nearby rental units.
The Highlands
Larger-yards residential pocket near schools, parks, and the hospital district, well-suited for family-tenant ADU rentals.
South Anacortes
Densely built SFH area near the ferry terminal and SR-20 spur, with confirmed ZHVI of $694,572 and solid workforce rental demand.
Anacortes ADU Market at a Glance
Local Zoning Rules
2026 Anacortes ADU Rules
Anacortes's 2026 ADU ordinance caps new units at 1,000 sq ft and 25 ft of height — in the typical range most ADU floor plans are designed around. Setbacks run 4 ft side and 4 ft rear, close to the regional baseline. Because of Anacortes'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 vary by project valuation — in line with what most homeowners budget for permitting through Planning, Community, and Economic Development (PCED). Submit directly to the department online — link below.
| Regulation | Anacortes Allowance |
|---|---|
| Max ADU Size | 1,000 sq ft |
| Max Height | 25 ft |
| Side Setback | 4 ft |
| Rear Setback | 4 ft |
| Architect / Engineer Stamp | Required for structural — Anacortes's Seismic Design Category D classification |
| Owner Occupancy | Not required |
| Short-Term Rental | Restricted |
| Coastal Overlay | Yes — CDP may be required |
| Design Review | No |
| HOA Prevalence | 26% of properties |
| Permit Fees | Varies by project valuation |
*Load-bearing modifications to the existing house always need an engineer stamp regardless of ADU size. Data verified 2026-08-15T06:10:50.038Z. Always confirm with the Planning, Community, and Economic Development (PCED) before designing.
Visit Planning, Community, and Economic Development (PCED) ↗
Anacortes Permit Process
Anacortes ADU Permit Timeline & Fees
Local Financing Resources
Local ADU Lenders in Anacortes
These lenders offer HELOC, construction, and renovation loans for ADU projects in Skagit County. Compare terms before committing.
Anacortes branch confirmed; offers construction, HELOC, and home equity products suitable for ADU projects in Skagit County.
Visit Lender ↗Confirmed Anacortes branch at 801 Commercial Ave offering Home Equity Lines of Credit locally serviced.
Visit Lender ↗WA community bank offering two-step construction loans up to 80% LTV with interest-only payments during the construction phase.
Visit Lender ↗Branch at 12275 Bartholomew Rd, Anacortes, offering Home Equity Lines of Credit and home improvement loans.
Visit Lender ↗WA/OR/ID credit union serving the region including Skagit County; HELOC up to 90% LTV usable for ADU construction and home improvement.
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 Anacortes
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 Anacortes 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, Community, and Economic Development (PCED).
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 Planning, Community, and Economic Development (PCED). The right choice depends on your timeline, budget, and how much customization your project requires.
Drawing Package Details
What's Included in Your Anacortes ADU Package
Engineered for WA Permit Approvals
What You Get
Anacortes ADU Drawings — What's Included
How our permit-ready drawing sets compare to hiring a local architect in Anacortes:
| 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
- ✓WA 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
- ✓Coastal Zone supplement
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
The Done-For-You Path
Want Your Anacortes 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 $1,950/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 Anacortes'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, Community, and Economic Development (PCED). 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 Washington cities with similar market conditions to Anacortes.
Build costs reflect local construction data for Anacortes. 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 Anacortes construction data (city-verified data) and Planning, Community, and Economic Development (PCED). Outcomes vary by project scope and site conditions.
Building Code
Anacortes Climate Zone & Energy Code
Washington State Energy Code (WSEC): Based on the 2021 IECC, this code establishes mandatory energy efficiency standards for residential and commercial buildings throughout Washington State and became effective on March 15, 2024.
Compare Cities
Anacortes vs. Nearby Washington Cities
| City | Build Cost/sqft | Permit Fees | 1BR ADU Rent | Cap Rate | Eligibility |
|---|---|---|---|---|---|
| Anacortes ← you | — | — | $1,950/mo | 3.5% | Free check → |
| Mount Vernon | $320 | $22,578+ | $1,259/mo | 5.4% | View → |
| Seattle | $550 | $11,638+ | $2,015/mo | 5.2% | View → |
| Spokane | $300 | $3,000+ | $1,161/mo | 6.5% | View → |
| Tacoma | $280 | $3,000+ | $1,496/mo | 5.8% | View → |
Frequently Asked
Anacortes ADU Questions
How much does it cost to build an ADU in Anacortes? +
What is the maximum ADU size allowed in Anacortes? +
How long does the ADU permit process take in Anacortes? +
Do I need owner-occupancy to build an ADU in Anacortes? +
What's the rental income potential for an ADU in Anacortes? +
How much does it cost to get ADU drawings in Anacortes? +
What drawings are required for an ADU permit in Anacortes? +
Can I convert my garage to an ADU in Anacortes? +
Does Anacortes have a coastal overlay for ADUs? +
What neighborhoods in Anacortes are best for ADU investment? +
Is Anacortes ADU-friendly? +
How much will an ADU increase my property value in Anacortes? +
Can I use my Anacortes ADU as a short-term rental (Airbnb / VRBO)? +
Does Anacortes's seismic zone affect ADU construction requirements? +
Where do I submit ADU plans in Anacortes? +
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