MNBE designs, permits, and builds ADUs, DADUs, and custom homes across Bothell, one licensed team from first site visit to final inspection.
One licensed, bonded team for the whole job, from design and Bothell Community Development permitting to fixed price construction.
Where a Maywood Hills or Queensgate lot's land value justifies it, we replace an aging home with a ground up custom home, with feasibility run honestly first.
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Detached, attached, and basement ADUs, up to two per lot and 1,200 sq ft each under Bothell's updated middle housing code (BMC 12.14.135).
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Drawings built to clear Bothell's Permit Center the first time, hillside lots, wetland buffers, and critical areas included.
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We design ADU submittals to land clean at Bothell's Permit Center, anticipating the corrections their reviewers send back before we file. Bothell permits every address inside city limits through one coordinated Permit Center, whether the parcel sits on the King or Snohomish County side, so you never deal with a county department. Every submittal and every response is handled by us, never a third party expediter.
Norway Hill, Westhill, Beckstrom Hill, and Queensborough climb steep, erosion prone grades, and the Sammamish River and North Creek corridors carry extensive wetlands and shoreline buffers. We coordinate the geotechnical report early, design stepped daylight and walkout foundations to the slope, and run critical area, wetland buffer, and any shoreline review in parallel with the building permit instead of letting it stall the project. On a critical area lot, where Bothell limits you to one ADU, we plan the unit around that constraint from day one.
Our detached ADU one city over in Redmond, full framing, roofing, kitchen, siding, and HVAC, finished and passed every inspection. We build the same way across Bothell. See the full project, and the homeowner's verified five star review, on the project page.
What We Build in Bothell
A freestanding backyard cottage with its own entrance and address, the strongest rental performer. Bothell allows detached ADUs up to 1,200 square feet, and a conversion of existing space can exceed that with Community Development Director approval if it stays under 40% of the main home. The larger, flatter lots around Maywood Hills and historic Main Street take one comfortably.
Connected to the main house by a shared wall or addition. Bothell allows up to two ADUs per lot with no owner occupancy requirement, and in 2025 the city eliminated parking minimums citywide, so no added parking is required and both units can be rented. Often the faster permit on a tighter Canyon Park or North Creek lot.
The early 1900s and mid century homes around historic Main Street, Maywood Hills, and Queensgate, along with the hillside lots of Norway Hill and Westhill, frequently sit on daylight or walkout basements that convert beautifully into legal dwellings with a separate grade level entrance, full kitchen, and code compliant egress.
On many Bothell lots, especially the older, larger parcels near Main Street and the view streets of Maywood and Norway Hill, land value justifies replacing an aging home outright. We run that feasibility honestly, sometimes the right answer is a ground up custom home, not a remodel, and build it under the same license and fixed price contract.
FAQ
Answering the questions Bothell homeowners ask us most about building an ADU.
Yes, with one exception. Under Bothell's updated zoning code (BMC 12.14.135) and Washington's HB 1337, most residential lots allow up to two ADUs, attached, detached, or a mix, with no owner occupancy requirement and no added parking. Critical area lots, meaning steep slopes, wetland buffers, and shoreline parcels, are limited to one ADU, as are lots with middle housing.
For a straightforward ADU, Bothell's Community Development Department Permit Center generally moves at least as fast as Seattle SDCI, thanks to a smaller queue and HB 1337's streamlined ADU mandate. Bothell has no clear match for Seattle's pre-approved DADU catalog, so a custom plan is the realistic path. Steep slope, wetland buffer, or shoreline lots add geotechnical and environmental review time.
Cost is site specific on Bothell lots, so we don't quote a generic per square foot number. The real drivers are slope and the engineered foundation it demands, wetland or shoreline buffers, distance to utilities, and whether you're building detached, converting a basement, or going ground up. After a free site visit and critical area check, you get one fixed price.
Thank you for considering MNBE for your Bothell ADU or custom home. We respond within one business day, Monday through Saturday.
We design and build across Bothell, from the flatter infill lots near historic Main Street and the revitalized Bothell Landing downtown to the steep, view streets of Norway Hill, Westhill, and Beckstrom Hill. We work the newer subdivisions of Canyon Park and North Creek as readily as the older Maywood Hills and Queensgate neighborhoods, on both the King and Snohomish County sides of the city, all permitted through the one Bothell Permit Center.