Home Additions in Seattle, WA
For Home Additions in Seattle, WA, Pro House Maintenance delivers licensed, insured crews and a free, no-obligation estimate before any work begins. Home Additions projects in this area typically cost $40,000–$150,000 per project. We finish on schedule, keep your property clean throughout, and treat every job as a reflection of our reputation.
Serving Capitol Hill, Fremont, Ballard, Queen Anne and nearby Washington communities.
What does Home Additions include?
- Architectural drawings and permit filing
- Foundation or structural modification work
- Framing, roofing, windows, and exterior finish
- Interior drywall, insulation, flooring, and trim
- Electrical and HVAC integration
How does Home Additions work in Seattle?
Site evaluation and design
We assess your foundation, roofline, and utility runs, then work with a licensed architect to produce permitted drawings.
Structural and foundation work
Footings, foundation extensions, or beam work are completed and inspected before framing begins.
Framing and envelope
Walls, roof structure, windows, and exterior cladding are installed to match your home's existing profile.
Interior finish
Insulation, drywall, flooring, and trim complete the addition so it's seamless with the rest of your home.
How much does Home Additions cost in Seattle?
Home Additions in Seattle typically runs $40,000–$150,000 per project, based on scope and materials. Pro House Maintenance gives every Seattle homeowner a free, fixed-price written quote before any work begins.
| Detail | What to expect |
|---|---|
| Typical cost | $40,000–$150,000 per project |
| Estimate | Free, fixed-price written quote |
| Crews | Licensed & insured, vetted local pros |
| Service area | Seattle, Washington and nearby communities |
Home Additions in Seattle — questions answered.
How much does home additions cost in Seattle?
In Seattle, home additions typically runs based on scope and materials. Pro House Maintenance gives every Seattle homeowner a free, fixed-price written quote before any work begins, so there are no surprises.
How long does a home addition take?
Most room additions take two to four months from permit approval, with timeline driven by foundation work, framing, roofing, and interior finish sequencing. Second-story additions or projects with significant square footage run four to six months. We build a phase-by-phase schedule into your contract with milestone dates so expectations are clear and trackable from day one.
Will the addition match my existing home?
Yes. We source matching siding, roofing, trim profiles, and window styles so the addition reads as original to the house rather than bolted on. Our architects review the exterior elevations and roofline integration before framing begins. Interior transitions — flooring, ceiling height, trim details — are also designed to flow seamlessly between the existing structure and the new space.
What homeowners say about home additions.
"We added a 400 sq ft family room and the addition blends perfectly with the original house. Outstanding craftsmanship."
"They finished our basement two days early and the inspector had zero notes. Crew was tidy and professional."
"The kitchen remodel came in on budget and the project manager actually answered the phone every time I called."
Other services in Seattle
Attic Finishing
Transform wasted attic space into a bedroom, office, or bonus room.
Basement Renovation
Turn an unfinished basement into living space you'll actually use.
Bathroom Remodeling
Spa-worthy bathrooms built on time and within budget.
Cabinet Installation
Custom, semi-custom, and stock cabinets installed level, plumb, and built to last.
Concrete and Masonry
Foundations, flatwork, steps, and walls built to carry loads for generations.
Deck Building
Custom decks designed and built to complement your outdoor living space.
Door Installation
New interior and exterior doors installed plumb, level, and properly weathersealed.
Home Additions in nearby cities
Key takeaways
- Home Additions in Seattle from Pro House Maintenance starts with a free, fixed-price estimate and no obligation.
- Typical home additions projects in Seattle, WA run $40,000–$150,000 per project.
- All crews are licensed, insured, and vetted local professionals.
- All crews are licensed and insured.
- Financing is available for qualified homeowners.
- Pro House Maintenance serves Seattle, Washington and surrounding communities.