DA DA Interior SolutionsGeneral Contractor · South Sound, WA
(253) 312-6024 Start Your Project
King County · Washington

Home Additions and ADUs in Bellevue

More square footage done right, room additions, second stories, and accessory dwelling units engineered, permitted, and built to match the home you already love. South Sound based, about 45 minutes from our shop, with over 12 years of hands-on remodeling experience behind every estimate we write.

Start Your Project Call (253) 312-6024
12 yrs
Experience
200+
Projects
5.0 ★
Rating
Free
In-home estimates
Home Additions and ADUs in Bellevue, WA by DA Interior Solutions
Walk-in shower · Bellevue
Frameless glass · hex mosaic field · linear drain
WA Reg · Bonded · Insured
DAINTIS775JL
Scope of Work

What a Bellevue home additions includes

Every remodel is scoped to your home, your written estimate lists exactly what's included. A sample of what we cover:

▸Room additions and bump-outs: primary suites, family rooms, home offices, and kitchens
▸Accessory dwelling units (ADUs): attached, detached, and garage conversions for rental income or multigenerational living
▸Second-story additions and structural reconfiguration
▸Foundation, framing, roofing, and exterior tie-ins matched to the existing home
▸Full mechanical scope: electrical, plumbing, and HVAC extended to the new space
▸Design, engineering, and permitting handled for you
▸Finishes matched to the existing home so the addition never looks bolted on
▸Built to current code and energy requirements

Additions and ADUs typically run two to four months depending on size, foundation work, and permitting timelines, which we manage and keep you ahead of.

Local Knowledge

Remodeling Bellevue homes

Bellevue's 1960s–80s ranches and split-levels in Lake Hills, Crossroads, and Newport Hills are prime candidates for the open-concept and primary-suite work we do most. Finish expectations here run high, and our tile and cabinetry work is built for exactly that standard.

Permits: the City of Bellevue Development Services Department handles residential permits with online intake. We handle the entire permit process, applications, plan documents, and inspection scheduling, on every project.

Lake HillsCrossroadsNewport HillsEastgate
How a Project Runs

One point of contact, start to sign-off

01Site Visit

Walk the space, take the measurements

We come to your home, measure everything, and listen more than we talk. You get a detailed written estimate, line by line, free, no pressure.

02Selections & Sequencing

Materials, permits, schedule

Finishes chosen with our guidance, permits pulled by us, trades booked in order. Nothing gets demoed until everything that follows is sequenced.

03Build & Walkthrough

Dust barriers up, schedule kept

Our crew builds, inspections pass, and we end the way it should: walking the finished space together, punch list in hand. It isn't done until you love it.

Field Reports

What clients say when the dust settles

★★★★★

Remodeled my kitchen and got it done a few days faster than expected, and it looks so nice now I can't wait to host people over.

Chris Estrada · Google Review
★★★★★

Did an excellent job doing a complete renovation/remodel of our bathroom and repairing/replacing a portion of siding on house. Really listened to what I wanted for my dream bathroom and delivered A+.

Pat Shandrow · Google Review

Read more reviews →See them on Google →

Budget & Planning

What to expect on cost

Additions and ADUs are priced by square footage, foundation and structural scope, and finish level. We walk the project with you, flag the cost drivers like foundation, roof tie-in, and utility runs up front, and give you a clear line-item estimate, including the rental-income math if an ADU is the goal.

Q & A

Questions, answered straight

Is an ADU worth it for rental income?

Often, yes, especially in our market, where demand for rentals and multigenerational space is high. We give you a realistic build cost and timeline so you can run the numbers, and we handle the permitting that makes an ADU legal to rent.

Will the addition match my existing home?

That is the whole point. We match rooflines, siding, trim, and finishes so the addition reads as part of the original home, not an obvious add-on. Done right, you cannot tell where the old house ends and the new space begins.

Do you handle the engineering and permits?

Yes. Additions involve structural engineering and a fuller permit set than a remodel, and we manage all of it, design, engineering, plan submittal, and inspections, so you are not chasing architects and the city yourself.

Which Bellevue neighborhoods do you serve?

All of Bellevue, including Lake Hills, Crossroads, Newport Hills, Eastgate, plus the surrounding King County area. We're about 45 minutes from our shop.

Who handles remodel permits in Bellevue?

For projects in Bellevue, the City of Bellevue Development Services Department handles residential permits with online intake. We prepare and submit all permit applications and schedule every inspection on your behalf, you never deal with the counter.

Planning a home additions in Bellevue?

Free in-home site visit, precise measurements, and a written line-item estimate. No pressure, no obligation.

Start Your Project Call (253) 312-6024
Nearby

Home Additions and ADUs near Bellevue

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