The best room additions don't read as additions. Pacific Blue Design & Build provides room additions across King County, Pierce County, and Kitsap County, with a design-build approach that matches the existing home from roofline to finish, under one clear process.
A bad addition looks tacked on. A good one looks like it has always been there. The difference is rarely budget. It is the planning. The matched roof pitch, the way the new windows align with the old, the floor that transitions without a step, the trim profile that picks up the original detail. Pacific Blue Design & Build approaches every room addition in Seattle with the existing home as the starting point.
This is not a stand-alone build. It is a design-build approach for homeowners across the Puget Sound who want their home to grow with their family without losing its character. Whether you are adding a primary suite, a sunroom, a mudroom, or a second story, our goal is the same: an addition that reads as part of the home, not a separate project bolted to the side.
Room Addition Services
Every addition starts with a problem the existing home can't quite solve. More bedrooms. More bathrooms. More light. More flow. Pacific Blue Design & Build matches the addition to the problem, not the other way around.
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A new primary bedroom and bath, often added off the back of the house or above an existing single-story footprint. We design these to feel like a quiet retreat, with proper insulation, sound separation, and natural light.
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For Seattle homes that need more daylight, especially through the long gray months, a sunroom or great room addition can transform the way the home feels year-round. We plan for the angles of natural light and the durability of the glass and roof system.
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A small addition with outsized daily impact. A real entry off the garage or back door, with bench seating, hooks, shoe storage, and durable flooring, makes Pacific Northwest weather and family life work together.
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When the lot is tight, and a single-story home needs to grow, a second-story addition can double the usable space without expanding the footprint. We handle the structural engineering, lateral bracing, and roof integration with care.
OUR 3D DESIGN-BUILD PROCESS
Remodeling decisions get expensive fast when you can't visualize the outcome. Our 3D design-build process removes the guesswork: every wall, finish, fixture, and sightline is modeled before construction begins. You'll walk through your remodel in photorealistic detail, make confident choices early, and avoid the costly change orders that derail most projects.
Pacific Northwest Design-Build
Pacific Blue Design & Build was created for homeowners who want more than a basic remodel. The process should feel organized. Communication should feel clear. The design should feel connected to the home and the way people live throughout the Pacific Northwest. We serve homeowners across King County, Pierce County, and Kitsap County with a thoughtful, design-focused approach that values functionality, timeless materials, natural flow, and careful planning.
Complementary Services
A room addition rarely lives in isolation. The new space connects to the existing home, the roof, the siding, and often the kitchen or bathroom on the other side of the wall. Explore the services that most often pair with a room addition.
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When the addition is the catalyst, a coordinated whole-home plan keeps the design language, finishes, and flow consistent across the entire house.
Explore Service
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A new addition often means tying into the existing roof or replacing portions of it. Coordinated roofing keeps the transition watertight and visually seamless.
Explore Service
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Matching siding across an addition is one of the most visible details. Coordinated siding work makes the new section disappear into the old.
Explore Service
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Many additions include a new bath or expand an existing one. Bringing the bath into the same design conversation keeps the finishes and plumbing decisions aligned.
Explore Service"I built this practice around the way I'd want a contractor to treat my own home — fewer clients, more oversight, and decisions made in writing before work begins. That's the standard on every Shiro commission."— Shir Gal Founder & Principal
Our Remodeling Process
Remodeling should not feel like guesswork. Our process is built to help Seattle homeowners move from early ideas to a more defined plan with fewer surprises and better decisions along the way.
Every project starts with a conversation in your home. We listen closely, take careful measurements, and learn what matters most, from the way you use each space to the realities of your budget.
Our in-house architect shapes your vision into a tailored design, paired with curated material samples, photorealistic walkthroughs, and a clear, itemized estimate so nothing is left to guesswork.
A dedicated project manager leads construction from start to finish, with weekly on-site walkthroughs and a private client portal that keeps you informed at every stage.
We finish the way we started, with care. Your home is professionally cleaned, every system tested and commissioned, and a complete maintenance binder handed over alongside photos documenting the journey from day one.
If you are thinking about adding to your home, start with a team that designs additions to feel like they belong. Pacific Blue Design & Build helps homeowners across King, Pierce, and Kitsap counties plan, permit, and build additions that match the existing home from foundation to finish.
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Frequently Asked Questions/p>
We've gathered the most common questions homeowners ask us, so you can plan your remodel with clarity and confidence.
We start by studying the existing home, the roof pitch, the window proportions, the trim profiles, the siding pattern, and the floor heights. The addition is then designed to pick up those cues so the new section reads as part of the original rather than a separate build.
Yes. Any addition that expands the footprint or adds living space requires permitting through the relevant jurisdiction, whether Seattle DCI, King County, Pierce County, or Kitsap County. We handle the full permitting process, including structural review and Washington State Energy Code compliance.
In many cases, yes, though it depends on the existing foundation, framing, and zoning. We review the structural realities during the design phase to confirm whether a full second story, a partial second story, or a different approach makes the most sense.
Most room additions run 16 to 28 weeks from groundbreak to final walkthrough, depending on size and complexity. Larger additions, second-story builds, and additions that include kitchens or bathrooms may run longer. We provide a written timeline before construction begins.
Yes. Many additions include a bathroom, kitchenette, or even a full kitchen, especially for primary suite additions or in-law spaces. We coordinate the plumbing, electrical, and ventilation as part of the unified design.
