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ADU Construction in Edmonds

Professional adu construction services in Edmonds and surrounding areas • Licensed & Insured • Free estimates

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Since 2017 • 100+ Projects
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(206) 591-1096

Last updated June 2026

Edmonds ADU Construction — Two ADUs Now Legal on Your Lot

The Edmonds-Kingston ferry run fills up fast on weekday mornings — which tells you something about how many people want to live near this waterfront. Rental vacancy in the 98020 zip stays low year-round, and under WA HB 1337 (2024), most single-family lots in Edmonds now qualify for up to two ADUs. That means a property owner near Brackett's Landing or up in the Meadowdale neighborhood can legally add a detached ADU in the backyard and convert a basement to an attached unit simultaneously — a combination that wasn't possible here three years ago. TopVolk Construction has been building ADUs across Snohomish County since 2017; Vladislav Volkov handles each project directly, from permit drawings through rough-in inspection to the blue tape walkthrough. A recent Meadowdale DADU included a Navien tankless water heater and a Mitsubishi mini-split, keeping the utility footprint compact without cutting corners on livability. Call (206) 591-1096 to schedule a free on-site consult with Vladislav — not a sales rep, not an estimator.

Most of Edmonds was built out between 1955 and 1980 — ranchers, split-levels, and two-story colonials on 7,000–9,500 sq ft lots running on gentle-to-moderate slopes toward Puget Sound. Those lot dimensions work well for DADUs. The 98020 zip covers Downtown Edmonds and the western residential blocks closest to the water; the 98026 zip picks up the inland sections through the Five Corners area toward the Lynnwood border. Both zones fall under City of Edmonds Development Services for permitting — not Snohomish County PDS, which handles unincorporated parcels outside city limits. Plan review in Edmonds currently runs 6–10 weeks for a complete ADU submittal. Lot coverage limits cap total impervious surface, so a 500–600 sq ft DADU footprint is usually achievable on a standard Edmonds lot without triggering a variance — but corner lots in the Seaview area near the waterfront need individual setback review. Edmonds also averages close to 37 inches of rain annually, which makes proper vapor barrier installation and site drainage planning non-negotiable for any ground-level ADU build.

Common ADU Construction Concerns in Edmonds

DADU vs. AADU vs. Basement Conversion: Which Makes Sense on Your Lot

Most Edmonds homeowners assume they want a detached ADU because it feels most like an independent rental — and they're often right, but not always. A basement conversion in a 1965 split-level on the east side of 98026 can run $40,000–$70,000 less than new detached construction, because the shell already exists. The trade-off is shared-wall sound transmission and a less independent feel for tenants. A DADU gives you a proper separate structure — typically 400–800 sq ft, with its own entrance, sub-panel, and outdoor space — but requires meeting Edmonds' 24-foot height limit and FAR calculations. WA HB 1337 removed minimum lot size requirements statewide in 2024, so the real decision comes down to your specific lot coverage, slope, and budget. TopVolk does a free site walk to show you which option pencils out before you spend money on drawings.

Utility Separation: Shared vs. Independent Water and Sewer Connections

City of Edmonds requires an early decision on whether your ADU will share the main home's water and sewer lateral or get a separate connection. Shared is cheaper upfront — roughly $3,000–$6,000 in plumbing rough-in work — but puts both units on one meter, which complicates billing for an unrelated tenant. A separate connection means cutting into the street lateral and paying a new hookup fee to Olympic View Water and Sewer District or Edmonds' own utility, depending on your block; that can run $8,000–$15,000 based on distance and depth. On sloped Meadowdale lots where sewer laterals run deep, the cost climbs further. Either path requires a rough-in inspection that passes before walls close — something TopVolk coordinates directly with the AHJ. Budget this line item before finalizing your project number; it's where ADU projects most often get surprised mid-build.

Navigating City of Edmonds Permit Review for a New ADU

Edmonds runs its own permit queue through City of Edmonds Development Services — separate from Snohomish County PDS, which covers unincorporated areas like parts of Lynnwood and Mill Creek. A new DADU submittal needs architectural drawings, a site plan showing setbacks and lot coverage, and energy compliance documentation. Plan review takes 6–10 weeks from a complete package; incomplete submittals restart the clock. Pre-approved ADU plan sets exist through state programs, but Edmonds still requires site-specific review for setbacks, grading, and utility connections even when you use a pre-approved floor plan. TopVolk is a WA Licensed Contractor with multiple completed Edmonds submittals — Vladislav prepares the package and tracks it through the queue so you're not calling the permit counter every other week. Once the permit issues, active construction on a 500–600 sq ft DADU typically runs 3–5 months. Call (206) 591-1096 if you want to know where your specific lot stands before spending on drawings.

What an Edmonds ADU Actually Costs — and What Moves the Number

A straightforward 500 sq ft detached ADU in Edmonds runs $140,000–$185,000 all-in, covering permit fees, site work, framing, MEP coordination, insulation, and finishes. Slope is the biggest variable: a flat Five Corners backyard is cheaper to build on than a sloped Seaview lot requiring a stem wall or helical piers. Finish level moves the number too — builder-grade LVP flooring and stock cabinets land at the lower end; LVL beam spans for an open-plan layout, quartz counters, and a Bosch appliance package push toward $185K and above. Soft costs add up fast: Edmonds permit fees run $3,000– $6,000, engineering (if required) adds $2,000–$4,000, and utility connection fees vary by hook-up type. TopVolk provides direct line-item quotes — not ranges — after the site visit. The contract includes a deadline penalty clause: if we miss the agreed completion date, there's a financial consequence on our end, in writing, before work starts.

Older Edmonds Lots: Drainage, Crawlspace Moisture, and Soil Conditions

Edmonds sits on a mix of glacial till and alluvial soils, with grades that run toward the Sound, and drainage is real work here — not an afterthought. A 1968 rancher in the 98020 zip often has an existing crawlspace with a failing vapor barrier. Building a new DADU adjacent to that structure means addressing the moisture problem first: installing fresh 6-mil poly vapor barrier, improving site drainage with perforated drain tile, and potentially regrading the adjacent yard. For ground-level ADU slabs, DriCore subfloor panels above the concrete add a thermal and moisture break that makes a meaningful difference in livability during Edmonds' long wet season. Any PT (pressure-treated) lumber in ground contact needs to be spec'd correctly for this climate. On north-facing ADU walls, Hardie cement-board siding holds up far better than cedar or LP SmartSide — it simply doesn't absorb the moisture that accumulates on shaded surfaces from October through April.

Frequently Asked Questions

How fast can you get to Edmonds for an ADU consultation?

Edmonds is a regular service area for TopVolk Construction. From King County, it's roughly 25–30 minutes up I-5 or Highway 99 without traffic — no extended travel fees apply. Vladislav Volkov does the site visit personally; you're meeting the person who will run the project, not someone whose job is to close the sale. Scheduling typically runs 3–7 business days out for an initial consult. A detailed line-item quote follows within 5–7 days of that meeting. Evening and Saturday appointments are available for homeowners who can't do weekday visits. Call (206) 591-1096 to get on the calendar.

What does building an ADU in Edmonds cost per square foot?

For a detached ADU in Edmonds, budget $260–$340 per square foot for the finished structure, excluding permit fees and utility connection costs. A 500 sq ft DADU runs roughly $130,000–$170,000 in hard construction costs before soft costs are added. Basement conversions come in lower — $80,000–$130,000 depending on how much structural and MEP work the existing space requires. Foundation type moves the number most on sloped lots: a slab pour is cheapest, a stem wall or helical pier system on a grade adds $8,000–$18,000. TopVolk provides exact line-item pricing after the site visit, not a range estimate from a phone call.

Does Edmonds require a separate building permit for an ADU?

Yes — City of Edmonds Development Services issues its own building permits, and an ADU goes through a full plan review cycle, not an over-the-counter approval. For a new DADU, allow 6–10 weeks from a complete submittal. Attached ADUs and basement conversions sometimes move faster if no structural modifications are involved. The application requires a site plan, architectural drawings, energy code compliance documentation (IRC-compliant, R-49 attic insulation minimum), and utility connection details. TopVolk handles the permit package as part of the project — as a WA Licensed Contractor with multiple Edmonds submittals completed, Vladislav knows what the city reviewers flag and what slows packages down.

Can the ADU have a full kitchen, laundry, and separate HVAC in Edmonds?

Yes. Edmonds allows full kitchen and laundry in both attached and detached ADUs, with no city-specific restrictions on appliance type beyond standard IRC code compliance. A typical ADU kitchen we'd build includes an induction or gas range, a range hood rated 400+ CFM vented to the exterior (not recirculating), and a Bosch or LG dishwasher. Laundry rough-in is a matter of running the correct drain, supply, and 240V outlet during the MEP phase — straightforward when planned from the start, expensive to retrofit later. For heating and cooling, a Mitsubishi mini-split handles an ADU efficiently without requiring ductwork, which simplifies the mechanical rough-in and keeps ceiling heights intact.

How long does an Edmonds ADU take from start to move-in?

End-to-end — design, permit, and construction — plan on 7–10 months for a new DADU in Edmonds. Permit preparation and plan review account for roughly 2–3 months of that. Active construction on a 500–600 sq ft detached ADU runs 3–5 months after permit issuance: foundation and framing (4–6 weeks), MEP rough-in and rough-in inspection (3–4 weeks), insulation and drywall hang/tape/mud (2–3 weeks), finish work and final inspection (3–5 weeks). Exterior work scheduled through the October–March rainy stretch needs careful sequencing for framing and dry-in. The completion date goes into the contract with a penalty clause — that deadline is a real commitment, not an estimate with a disclaimer attached.

Do you build ADUs in Mountlake Terrace, Lynnwood, and Shoreline too?

Yes. TopVolk covers the full Snohomish and King County service area. Mountlake Terrace (98043) and Lynnwood (98036, 98037) are regular project areas — incorporated Lynnwood runs its own permit queue, while unincorporated parcels nearby fall under Snohomish County PDS. Shoreline (98133, 98155) is in King County and permits through the City of Shoreline's own center. Each jurisdiction has its own plan review timeline and fee schedule, but the build sequence is the same. If your property sits anywhere in the Edmonds–Lynnwood–Mountlake Terrace corridor, call (206) 591-1096 and Vladislav will confirm whether your lot qualifies under WA HB 1337 and what the permit path looks like.

Ready to start your ADU Construction in Edmonds?

Free on-site consultation with Vladislav. Line-item pricing — no vague ranges.

ADU Construction Services in Edmonds

ADU design

Permit processing

Foundation work

Complete construction

Why Choose TopVolk Construction LLC in Edmonds?

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Fully licensed contractor with comprehensive insurance coverage for your peace of mind.

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What Our Edmonds Customers Say

What Our Customers Say

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Oleksii Pechenev
4 days ago

Vlad and his team did an amazing job! They built our deck in just 3 days—no issues at all. Communication was easy, and Vlad helped us choose right deck planks. Installation was quick and flawless. Highly recommend!

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Anna Garaeva
3 months ago

Really happy with the service! Vlad was easy to communicate with and helped us to find the best garage door opener. The installation was quick and he did a perfect job. A few months later, I had a question and he came by the same day - even on a weekend. That kind of follow-up is rare these days!

S
Sarah Tan
5 months ago

Vlad replaced a bathroom exhaust fan and gave me a reasonable quote up front with no hidden fees. While replacing the fan, he discovered a plumbing vent issue causing mold. He fixed the pipe and treated the mold at a reasonable cost. I really appreciate his honesty!

R
Raj Sundarraj
2 months ago

Outstanding work done by Vlad and team for our home cabinet/living room interior work. Very professional and reasonable charges. Love the service.

J
Jennifer Martinez
1 month ago

We hired TopVolk for a full kitchen remodel and couldn't be happier. From the initial consultation to final walkthrough, Vlad was professional and attentive to every detail. The result exceeded our expectations!

M
Michael Chen
2 weeks ago

Excellent bathroom renovation! Vlad completed the project on time and on budget. His attention to detail and craftsmanship is outstanding. We'll definitely hire him again for future projects.

(206) 591-1096