DA DA Interior SolutionsGeneral Contractor · South Sound, WA
Pierce · King · Thurston Counties

MORE HOME additions and ADUs, done right

More square footage done right, room additions, second stories, and accessory dwelling units engineered, permitted, and built to match the home you already love. Fully managed by DA Interior Solutions: design guidance, permits, trades, and a walkthrough we never rush.

12 yrs
Experience
200+
Projects
5.0
Rating
Free
In-home estimates
Walk-in shower, Frameless glass · hex mosaic field · linear drain by DA Interior Solutions
Walk-in shower
Frameless glass · hex mosaic field · linear drain
WA Reg · Bonded · Insured
DAINTIS775JL
Capabilities

What we handle

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.

Selected Work

Recent addition work

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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.

By City

Home Additions and ADUs across 17 South Sound cities

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 →

Ready to start your home additions?

Free in-home site visit and a clear written estimate, line by line.