ADU Construction in Lake Stevens, WA
Licensed design-build contractor for accessory dwelling units
Based in Granite Falls, we design-build accessory dwelling units for homeowners here — often a family cottage or a long-term rental on land the household already owns. Slope, drainage, and city versus county mapping come before finish samples.
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7 Years Experience
Serving Snohomish and North King County since 2019.
Grade and mapping before the floor plan
ADU construction in Lake Stevens starts with what the lot allows. Lake-side and hillside streets change what a pad can be. We walk slope, drainage, and equipment access before anyone prices cabinets. The floor plan is the easy part once the lot is honest.
The city has grown quickly. City versus county lines are not always what the mailing address suggests. We verify current mapping from the parcel number, then prepare the construction application for the city desk or county PDS.
The city handles permits for lots inside city limits. County PDS applies if the parcel is unincorporated. Current rules and intake live on Permit Center. Unincorporated parcels use Snohomish County PDS instead. We confirm which desk has the lot before we draw. Permits handling means we prepare and coordinate the construction application — the city still decides approval and timing. See the feasibility guide.
Site prep on a backyard lot
How owners use a backyard cottage
Why homeowners add a unit
The building is an accessory dwelling unit. How you use it is a separate decision — and it depends on city rules, not only on construction.
Family and in-law
Parents, adult children, or a caregiver who need a separate door and a bathroom. That is often the reason for the project here — we still treat slope and drainage as construction facts, not afterthoughts.
Long-term rental
A second dwelling leased by the month on land you already own. Durable finishes, storage, laundry, and a clear entry from parking are the construction choices. Landlord licensing stays with you.
Guest stays
Some owners plan short-term listings. That is a use, not a separate Artbrick service. City rules for Airbnb-style stays are separate from the building permit and are not guaranteed by construction.
What usually stalls a backyard cottage
These are the questions that stall projects — not cabinet colors. We put them on the table in the first conversation.
- Will this lot qualify after setbacks, coverage, slope, and drainage?
- Is the parcel inside city limits, or unincorporated county after recent growth?
- Permit delay or denial after money is already spent on drawings
- Surprise cost: sewer or septic, electrical capacity, retaining or drainage work
- HOA or neighbor rules that are stricter than zoning
- Living on the lot through a long, noisy build
- Planning a short-term listing that the city may not allow
We handle the construction permit path. We do not license listings, manage tenants, or promise rental income. Read the permit process overview before you compare builders on price alone.
Layout & survey before drawings
What we build
Detached, attached, and conversion ADUs
Detached cottages are common when the lot can take a pad. On slope or tight access, an attached unit or conversion may be the buildable path. We say which one after we walk drainage, not from a stock plan.
Detached backyard cottage
A backyard cottage with its own foundation. Feasible when slope, drainage, and access still leave a pad after setbacks — we walk those before we call it a cottage lot.
Attached in-law unit
An in-law unit connected to the house. Often the better path on hillside or lake-side lots where a separate pad fights the grade.
Garage or basement
A garage or basement conversion where egress, moisture, and the jurisdiction allow. Grade and water management matter as much as the existing shell.
Interior finish inside the unit follows the same standards as our kitchen remodel and bathroom remodel work. Full construction scope also lives on ADU construction.
How a backyard-cottage project runs
Feasibility first for ADU construction in Lake Stevens. Permits second. Construction after the path is written down.
Feasibility
Lot, city vs county, utilities, and how you will use the unit. Honest if the pad is not there.
Permits handling
Application support and plan-review coordination with the desk that has the parcel. Approval and calendar stay with the jurisdiction.
Build and handoff
Foundation through interior finish with inspection holds. Punch list before you move anyone in.
ADU construction sequence
Foundation through finish from Artbrick ADU construction in Lake Stevens and nearby Snohomish County lots. This is the sequence we run — not a claim that every photo was shot on this lot. See more work in the portfolio.
Site excavation
Foundation prep
Footprint layout
Trench work
Stem wall pour
Gravel base
Anchor bolts
Utility rough-inThis lot and nearby cottage work
Planning ADU construction in Lake Stevens? Send the address with the consultation button on this page. We confirm city vs county and whether the lot is a fit.
Lake Stevens
City building desk. Nearby: Marysville, Snohomish, Granite Falls.
Also building cottages in Granite Falls · Everett · Marysville · Arlington.
Questions before you start
Do you design and build the unit, or only construct it?
Artbrick LLC is a licensed Washington contractor (ARTBRL*812B8) based in Granite Falls. We design-build accessory dwelling units with permits handling — one team from feasibility through handoff, not a separate architect, permit runner, and builder.
Which office issues the building permit?
Inside city limits, the city building desk linked above. If the parcel is unincorporated, Snohomish County PDS issues the permit even when the mailing city matches. A ZIP code is not jurisdiction. We confirm from the parcel, then prepare the construction application for that desk. Approval and timing stay with the jurisdiction.
Can I add a backyard cottage on this lot?
It depends on the parcel: setbacks, lot coverage, utilities, septic or sewer, access, and what already sits on the land. We review the parcel map before anyone invests in full drawings.
What do people in this area use a backyard cottage for?
Most owners add space for parents or adult children, a long-term rental on the same lot, or a guest unit. Short-term listings (Airbnb and similar) are a use some owners want — only where the city allows it, and listing licenses are separate from the building permit.
Does a building permit let me list the unit short-term?
No. Short-term rental rules, owner-occupancy requirements, and listing licenses vary and change. A building permit is not permission to list the unit. We scope construction. You confirm rental licensing with the city. We do not promise income or manage listings.
How do I start a backyard-cottage project?
Call (425) 422-5947 or use the consultation button on this page. Share the address, whether the unit is for family, monthly rental, or guests, and a rough timeline. We follow up on feasibility before ground breaks. Nearby communities include Marysville, Snohomish, Granite Falls.
Start with the property address
For ADU construction in Lake Stevens, send the property address. We confirm jurisdiction for the lot, talk through how you plan to use the unit, and say honestly if the pad is a fit.