ADU & DADU builder in Mukilteo.
Sloped view lots and critical-area review are the norm in Mukilteo — the site work and permitting a backyard home here depends on most. DIGS designs, permits and builds custom ADUs, DADUs and homes across Mukilteo and the surrounding Greater Seattle area — owner-led from the first call through final inspection.
Every trade your Mukilteo build needs — one team.
ADU & DADU Construction
Experts in constructing Attached and Detached Accessory Dwelling Units for versatile living spaces.
Site Development
Land preparation for construction, including grading, excavation, and utility installation.
Excavation
Digging and removing earth or rocks to prepare the construction site.
Groundwork
Initial preparation of land, including excavation and foundational activities.
Concrete & Foundations
Building strong foundations with high-quality concrete for durable construction projects.
Civil Work
Construction activities related to infrastructure, such as roads, bridges, and utilities.
A local builder who knows Mukilteo.
Headquartered in Monroe, WA 98272, DIGS has spent 37+ years building across King and Snohomish County. We know the local zoning, critical-area rules, setbacks and how Mukilteo reviews and permits — so your project never stalls at an unfamiliar counter.
Experienced Team
37+ years of local building, with deep familiarity with Seattle, King and Snohomish County code.
Customizable Designs
Ready-made plans you can adapt — or a fully custom design drawn to your lot and lifestyle.
Clear, Honest Pricing
Line-item estimates, no hidden fees, and no scope changes without your sign-off in writing.
Honest Communication
Real-time project visibility and a builder who is always reachable by phone, email or text.
ADU & DADU guides for Mukilteo homeowners
- Can You Build an ADU on a Septic System? →
- ADU Rules Outside Seattle: Snohomish & King County →
- Can You Sell a DADU Separately in Washington? →
- Washington’s ADU Laws: What Changed and What It Means for You →
- How Much Does It Cost to Build a DADU in Seattle? →
- Does Building an ADU Raise Your Property Taxes? →
Also building ADUs & DADUs near Mukilteo
Seattle, WA · Bellevue, WA · Redmond, WA · Kirkland, WA · Sammamish, WA · Bothell, WA · Kenmore, WA · Woodinville, WA · Shoreline, WA · Lynnwood, WA · Everett, WA · Snohomish, WA · Monroe, WA · Lake Stevens, WA
Building an ADU in Mukilteo — the basics.
Who issues the ADU or DADU permit in Mukilteo, WA?
For an address inside Mukilteo city limits, the City of Mukilteo's permit office reviews and issues the permit under the city's own ADU code. Unincorporated parcels nearby go through Snohomish County instead, under different rules, size limits and fees — so the jurisdiction line is the first thing a feasibility study confirms.
How much does a DADU cost to build in Mukilteo?
A fully permitted, professionally built detached ADU in Mukilteo and the surrounding Greater Seattle area typically runs $375,000 to $600,000+ all-in — design, permitting, site work and construction. Where a specific lot lands in that range is decided by site conditions: slope, soils, utility distances and tree or critical-area constraints.
Does DIGS build ADUs and DADUs in Mukilteo?
Yes. DIGS Construction and ADU Builder is headquartered in Monroe, WA and has built across King and Snohomish County since 1989, including Mukilteo. Owner Eric Dexter leads every project personally from the first call through final inspection, and quotes are all-in with site work included.
More answers in the ADU & DADU FAQ, or estimate a Mukilteo project with the ADU cost calculator.
“Eric and his team did a fantastic job clearing out some land to make it usable and prepping areas just how we needed them. The results look great.”
Building in Mukilteo? Let's talk.
Tell us about your lot and your goals. Eric follows up personally — the same person from the first call through final inspection. No pressure, no obligation.
- Owner-led — 37+ years, 100+ homes built
- Clear, line-item pricing · no hidden fees
- Serving Seattle, King & Snohomish County