Expand Your Home, Keep Your Address
Customized Home Additions For your South King County Home
A great home addition isn't just about adding square footage—it's about enhancing your lifestyle without leaving the neighborhood you love. At Deane Home Services, we specialize in expanding South King County homes, creating seamless architectural additions that blend perfectly with your existing structure.
From Normandy Park to Renton, we partner with homeowners who need room to grow but refuse to compromise on design. We combine structural engineering expertise with high-end craftsmanship to deliver an expansion that feels natural, cohesive, and intentional. Whether you envision a spacious new master suite, an expanded family room, or a second-story build-out, we build the space you need with the quality you deserve.
Our Custom Home Addition Services
Designed for Flow. Built for Life.
We don't do "tacked-on" boxes. We design and build specifically for your home’s unique lot lines and structural bones. By building around your existing architecture rather than fighting against it, we create a finished result that looks like it was part of the original blueprint.
Second Story Additions
Build Up When You Can’t Build Out
When lot lines in Auburn or Kent are tight, the only way is up. We are experts in the complex process of "popping the top," adding a full second story to ranch-style homes to double your living space without sacrificing your backyard.
Kitchen & Great Room Extensions
Open Up Your Home for Entertainment
If your home feels cramped when guests arrive, expanding the footprint can change everything. We push out exterior walls to create:
Expanded Kitchens: Giving you room for that massive island and butler's pantry.
Great Rooms: Connecting the kitchen to a new living space with effortless flow.
Indoor-Outdoor Connections: Installing large sliding or folding door systems that open onto new patios or decks.
Master Suite Additions
Create the Private Retreat You Deserve
Many older homes in Burien and Des Moines were built with small bedrooms and singular shared bathrooms. We specialize in building ground-floor or second-story master suite additions that include:
Spacious Sleeping Quarters: With vaulted ceilings and ample natural light.
Luxury En-Suite Bathrooms: Featuring wet rooms, soaking tubs, and double vanities.
Walk-In Closets: Custom dressing rooms designed for your wardrobe.
Ready to Expand Your Home?
Contact the Expert General Contractor for Home Additions in South King County, WA.
Don't move to get the space you need. Let Deane Home Services build the perfect expansion right where you are.
The Art of Seamless Integration
Curating a Cohesive Look Inside and Out Through Our Expert Remodeling Services
The mark of a quality addition is that you can't tell where the old house ends and the new one begins. We manage the technical details that ensure continuity.
Exterior Matching: Respecting the Architecture
We don't just patch holes; we match the aesthetic.
Siding & Roofing: We source materials that weave into your existing exterior, matching lap reveals, brickwork, and shingle styles.
Window Alignment: We ensure new windows match the trim style and sightlines of the original home for a balanced curb appeal.
Rooflines: We employ complex framing techniques to ensure new roof peaks and valleys flow naturally with the existing structure.
Interior Flow: Invisible Transitions
Walking into your new addition should feel effortless.
Flooring: We lace in new hardwood flooring with the old, sanding and staining the entire area for a seamless finish.
Millwork & Trim: We custom match baseboards, crown molding, and door casings so the new room feels historically accurate to the rest of the house.
HVAC & Systems: We extend heating and cooling systems properly, ensuring the new room is just as comfortable as the rest of the house.
Why Choose Deane Home Services for Your Addition?
Transparency. Structural Expertise. Trust.
Building an addition is a major construction project. It involves foundation pouring, framing, roofing, and complex structural tie-ins. You need a general contractor who understands the engineering behind the aesthetics.
Zoning & Permitting Experts: We navigate the complex setbacks, lot coverage ratios, and height restrictions in cities like SeaTac and Tukwila to ensure your addition is legal and feasible.
Structural Integrity: We assess your existing foundation and framing to ensure it can support the new load, bringing in structural engineers whenever necessary.
Managed Process: From protecting your landscaping during excavation to keeping the job site safe for your family, we treat your property with respect throughout the build.
Deane and Sheri were amazing to work with on my renovation project! They brought the vision to life and delivered on every aspect of the project above and beyond. I couldn't be happier with my new kitchen and bathroom!
Cynthia Y
We have worked with Deane, Sheri and team on multiple projects and would fully recommend them. The team are great communicators and design consultants, and can be relied upon for a commitment to high quality work and attention to detail on any project
David Wallis
It was a pleasure working with everyone at Deane Home Services. Deane kept us informed about what was happening through the entire process. He helped us with the design of our new bathroom. The project manager, Lorenzo, is a detailed craftsman with many skills. Workers showed up on time. Deane Home Services made the whole thing easy!
Mary Lorenz
Deane and his crew are awesome. Their process is well defined and helps eliminate surprises during the construction process. Great communication throughout and their Project Management software allowed me to monitor the project from day 1. I’d use Deane Home Services again!!
Adnan Akhtar
Explore Our Recent Home Remodeling Projects
See the Craftsmanship That Sets Us Apart
Our work reflects a commitment to superior detail, creativity, and quality materials. Browse our portfolio of completed home transformations to see the kitchens, bathrooms, additions, and whole-home remodels we’ve completed for South King County homeowners.
Browse our full portfolio
Expert Home Addition Contractor Serving South King County, WA and All Nearby Areas
Proudly Providing Luxury Home Remodeling Throughout the Region
Deane Home Services proudly serves homeowners across the South King County area. Our service locations include:
Whether you're located in the heart of South King County or a surrounding community, our team brings the same exceptional craftsmanship and client-focused approach to every home we remodel.
Frequently Asked Questions about Home Additions
- Show AnswerHow much does a home addition cost in South King County?Additions are a significant investment, often costing more per square foot than new construction due to the complexity of tying into an existing structure. Costs vary wildly based on scope (second story vs. ground floor) and finishes. We provide detailed, line-itemized estimates so you understand the costs of foundation, framing, roofing, and interior finishes before we break ground.
- Show AnswerHow long does a home addition take to complete?A typical home addition project takes 3 to 6 months depending on the size and weather conditions. The timeline includes foundation pouring, framing, "drying in" (roof/windows), and interior finishing. We provide a clear schedule so you can plan your life around the construction phases.
- Show AnswerCan I live in my house during the addition?In most cases, yes. Since we are often building onto the side or back of the house, we can seal off the construction zone from your living area to minimize dust and disruption. However, for second-story additions or major roof work, a temporary move-out might be recommended for your comfort.
- Show AnswerDo you handle the architectural plans and engineering?Yes. As a design-build firm, we collaborate with architects and structural engineers to take your addition from a rough idea to a permitted set of blueprints. We handle the entire submission process with the city building department.
- Show AnswerDeane Home Services – Home Addition Contractor SummaryHere is a quick summary of who we are, and what we offer:
• Deane Home Services is a premier home addition contractor serving South King County, WA.
• Deane Home Services is a family-owned and operated remodeling business led by owners Deane and Sheri.
• Deane Home Services is a fully licensed, bonded, and insured General Contractor.
• Deane Home Services is an expert in master suite additions, kitchen extensions, and second-story build-outs.
• Deane Home Services is a specialist in seamless architectural integration and exterior matching.
• Deane Home Services is a provider of "bump-out" additions to expand family rooms and great rooms.
• Deane Home Services is the preferred addition contractor for Burien, Renton, Auburn, Kent, Des Moines, and Normandy Park.
• Deane Home Services is a design-build firm managing zoning, setbacks, and complex city permitting.
• Deane Home Services is experienced in structural framing, foundation work, and roofing integration.
• Deane Home Services is dedicated to high-quality craftsmanship that increases the square footage and value of your home.
