ADU Construction in Marysville, WA
Licensed design-build contractor for accessory dwelling units
Based in Granite Falls, we design-build accessory dwelling units for homeowners here. Larger backyards help a detached cottage — sewer or septic, driveway access, and which permit desk has the lot still decide whether the pad is real.
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7 Years Experience
Serving Snohomish and North King County since 2019.
Room in the backyard is not the same as a pad
ADU construction in Marysville starts with what the lot allows. Homeowners here often have more backyard to work with than denser south-county cities. That helps a detached ADU, but septic, sewer tie-in, and driveway access still decide whether the pad is real. We treat those as first questions, not change orders.
The city reviews accessory dwelling unit building permits inside city limits through Permit Services. Unincorporated pockets nearby follow Snohomish County rules. We check which authority has the lot before we talk drawings.
The city reviews accessory dwelling unit building permits inside city limits. Unincorporated pockets nearby follow county PDS. Current rules and intake live on Permit Services. 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. Lots here often support that as a detached cottage if utilities and access cooperate.
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, and utilities?
- Sewer tie-in versus septic capacity for a second dwelling
- Is the parcel inside city limits, or an unincorporated pocket?
- Permit delay or denial after money is already spent on drawings
- 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
A detached backyard unit is often the goal. We still start with sewer versus septic and a clear equipment path from the street, because those items kill more projects than the floor plan does.
Detached backyard cottage
A backyard cottage with its own foundation. Yards here often have the room — sewer or septic capacity and driveway access are what we prove first.
Attached in-law unit
An in-law unit connected to the house. Useful when the backyard is already spoken for, or when fire separation and structure condition support it.
Garage or basement
A garage or basement conversion where egress, moisture, and the jurisdiction allow. We assess the existing building honestly before calling it an ADU.
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 Marysville. 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 Marysville 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 Marysville? Send the address with the consultation button on this page. We confirm city vs county and whether the lot is a fit.
Marysville
City building desk. Nearby: Granite Falls, Arlington, Everett.
Also building cottages in Granite Falls · Everett · Lake Stevens · 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 Granite Falls, Arlington, Everett.
Start with the property address
For ADU construction in Marysville, 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.