ADU Design Resource · Yakima, WA
The Complete Guide to
Building an ADU in Yakima, WA
Everything Yakima 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 Yakima, WA ADUs
Market Context
Yakima has a median home value of $229,000. Adding an ADU typically increases that by 28% — approximately $64,120 in added equity. A 1-bedroom ADU in Yakima rents for approximately $1,072/month in the Yakima County rental market , yielding a 7% cap rate on the investment. Occupancy averages 98% in this market.
Top Yakima neighborhoods for ADU investment include Central Yakima, Terrace Heights, East Yakima, West Valley, Selah. Close to downtown jobs and dense older single-family housing, making high tenant demand and many retrofit ADU opportunities. Near Pacific Northwest University of Health Sciences and medical employers, strong demand from students and clinicians.
Permit Process
Permit applications are reviewed by the Code Administration Division , with a plan check timeline of approximately 8 weeks. Permit fees in Yakima range from $4,783 to $5,530 depending on project scope. Design review: Yes - in historic districts only
Yakima's Code Administration Division often requires proof that your existing water meter can handle the added fixture count before they'll sign off on an ADU, and if it can't, you're looking at a costly meter upgrade coordinated with the City's Wastewater Division—not something the building department handles directly, so homeowners get bounced between offices. Irrigation district easements are also common on older Yakima lots, especially in the Fruitvale and Nob Hill areas, and building over or too close to one can force a redesign even after your plans are drawn up. Because STRs are allowed, expect extra scrutiny on off-street parking requirements if you plan to rent the ADU short-term, since Code Administration has been known to flag applications that don't show two dedicated spaces on site.
"In my experience reviewing ADU submittals here in Yakima, that $250/sqft figure and the 8-week timeline are state-level averages, not local truth — I'd get at least two Yakima-based contractor quotes and call the Code Administration Division directly before penciling in a budget or start date. I've also seen straightforward-looking projects stretch past 8 weeks simply because the drawing set needed a second correction cycle, so build in buffer even if you're confident in your plans."
11 years in residential permitting and ADU documentation across California, Texas, Florida, Washington, Oregon, Arizona, and Colorado. This guide was researched and verified against Yakima's building department records and current 2026 Washington's HB 1337 ADU law.
Property Eligibility
Is My Yakima, WA Property Eligible for an ADU?
Yakima 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 Yakima under Washington's HB 1337 (2023). No owner-occupancy requirement in Yakima — 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 Code Administration Division.
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 Yakima's local rules. Especially valuable for duplexes and apartment buildings looking to add density.
HOA-Governed Properties
Approximately 31% of Yakima 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.
Historic Districts
Yes - in historic districts only
Always verify eligibility with Code Administration Division before designing.
Free — No Obligation
Will Yakima Approve an ADU on Your Lot?
Send us the address and we’ll check it against Yakima’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 Yakima 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
Yakima ADU Return Calculator — Built With 2026 Local Data
Pre-loaded with verified Yakima 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: Code Administration Division (source ↗), Zillow Rental Market Reports, and public state/local housing data. Last verified: 2026-07-12.
Local Market Data
Top Yakima Neighborhoods for ADU Investment
Central Yakima
Close to downtown jobs and dense older single-family housing, making high tenant demand and many retrofit ADU opportunities.
Terrace Heights
Near Pacific Northwest University of Health Sciences and medical employers, strong demand from students and clinicians.
East Yakima
Proximity to downtown, fairgrounds and colleges with many older single-family lots suitable for ADUs.
West Valley
Larger lot sizes and suburban single-family homes make detached ADUs and detached garages-with-ADU easier to build.
Selah
Rapidly growing bedroom community with larger lots and commuter proximity to Yakima jobs.
Ahtanum
Rural/residential lots with ample space for detached ADUs and steady demand for rental housing.
Moxee
Near growing residential subdivisions with buildable lots and commuter access to Yakima jobs.
Gleed
Agricultural/rural lots and multigenerational households create ADU opportunities for additional rental or family housing.
Union Gap
Strong employment and retail hub (Valley Mall) nearby supports rental demand for ADUs.
Granger
Affordable home values and larger lot footprints make detached ADUs feasible and attractive to renters.
Yakima ADU Market at a Glance
Local Zoning Rules
2026 Yakima ADU Rules
Yakima's 2026 ADU ordinance caps new units at 1,000 sq ft and 35 ft of height — in the typical range most ADU floor plans are designed around. Setbacks run 5 ft side and 5 ft rear, close to the regional baseline. Because of Yakima's Seismic Design Category C 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 $4,783–$5,530 — in line with what most homeowners budget for permitting, and plan check takes about 8 weeks at Code Administration Division. Submit directly to the department online — link below.
| Regulation | Yakima Allowance |
|---|---|
| Max ADU Size | 1,000 sq ft |
| Max Height | 35 ft |
| Side Setback | 5 ft |
| Rear Setback | 5 ft |
| Architect / Engineer Stamp | Required for structural — Yakima's Seismic Design Category C classification |
| Owner Occupancy | Not required |
| Short-Term Rental | Permitted |
| Coastal Overlay | No |
| Design Review | Yes - in historic districts only |
| HOA Prevalence | 31% of properties |
| Permit Fees | $4,783–$5,530 |
*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 Code Administration Division before designing.
Yakima Permit Process
Yakima ADU Permit Timeline & Fees
ℹ Timeline and fee estimates are based on Washington state averages. Actual Yakima data coming soon.
Local Financing Resources
Local ADU Lenders in Yakima
These lenders offer HELOC, construction, and renovation loans for ADU projects in Yakima County. Compare terms before committing.
Offers a 10-year draw period with interest-only payments and a minimum loan amount of $20,000.
Visit Lender ↗Provides construction-to-permanent financing with local underwriting and up to 90% financing of build costs.
Visit Lender ↗Explicitly offers financing for accessory dwelling units (ADUs) with a single application and closing process.
Visit Lender ↗Features an All-in-One Custom Construction Loan that combines building costs and permanent financing into one set of closing costs.
Visit Lender ↗Specializes in loans based on the property's after-renovation value, allowing for up to 150% LTV in some cases.
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 Yakima
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 Yakima 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 Code Administration 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 Code Administration Division. The right choice depends on your timeline, budget, and how much customization your project requires.
Drawing Package Details
What's Included in Your Yakima ADU Package
Engineered for WA Permit Approvals
What You Get
Yakima ADU Drawings — What's Included
How our permit-ready drawing sets compare to hiring a local architect in Yakima:
| 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
- ✓2 rounds of revisions
- ✓Priority 5-day turnaround
The Done-For-You Path
Want Your Yakima 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 $1,072/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 Yakima'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 Code Administration 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 Washington cities with similar market conditions to Yakima.
Build costs reflect local construction data for Yakima. 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 Yakima construction data (city-verified data) and Code Administration Division. Outcomes vary by project scope and site conditions.
Building Code
Yakima Climate Zone & Energy Code
WA State Energy Code (WSEC) — Washington’s residential energy code (based on the 2021 IECC with state amendments) requires ADUs to meet residential energy-efficiency provisions for envelope, HVAC, water heating, and lighting.
Compare Cities
Yakima vs. Nearby Washington Cities
Frequently Asked
Yakima ADU Questions
How much does it cost to build an ADU in Yakima? +
What is the maximum ADU size allowed in Yakima? +
How long does the ADU permit process take in Yakima? +
Do I need owner-occupancy to build an ADU in Yakima? +
What's the rental income potential for an ADU in Yakima? +
How much does it cost to get ADU drawings in Yakima? +
What drawings are required for an ADU permit in Yakima? +
Can I convert my garage to an ADU in Yakima? +
What neighborhoods in Yakima are best for ADU investment? +
Is Yakima ADU-friendly? +
How much will an ADU increase my property value in Yakima? +
Can I use my Yakima ADU as a short-term rental (Airbnb / VRBO)? +
Yakima has a high HOA rate (31%) — do I need HOA approval for an ADU? +
Does Yakima's seismic zone affect ADU construction requirements? +
Where do I submit ADU plans in Yakima? +
More Services in Yakima
Free · No Obligation
Not Sure If Your Yakima Lot Qualifies?
Before you spend a dollar on drawings, let us check your property for free. We'll tell you honestly whether your Yakima lot supports an ADU, what it could rent for, and what to do next — no pressure, no sales pitch.
Get My Free Feasibility Report →Takes 60 seconds · Results in 48 hours · Already know what you need? See pricing ↑