Room additions
Room additions and layout changes that grow your home without moving.
Room additions, garage conversions, and floor plan reconfigurations for Puget Sound homeowners — structural engineering, in-house permitting, and finish work under one contractor. Written proposals and a dedicated project manager start to finish.
- Structural engineering coordinated
- In-house permitting
- Written proposals & timelines
What we handle in a room addition project.
From an added bedroom to a full first-floor extension:
- New room additions — bedrooms, home offices, family rooms, and primary suites added to the existing footprint.
- Garage conversions — attached garages converted to living space, permitted and insulated to match the home.
- Floor plan openings — removing walls (including load-bearing walls with proper engineering) to connect rooms and improve flow.
- Second-floor additions — vertical expansions coordinated with the structural engineer, foundation assessment, and local permits.
- Sunrooms and three-season rooms — insulated additions designed for year-round use in the Pacific Northwest climate.
- Layout reconfigurations — moving hallways, doorways, or stairways to change how the home functions.
- Utility connections for new spaces — electrical, plumbing, and HVAC extended into the addition as part of the scope.
Room addition projects start with a free on-site consultation. You leave with a written proposal that covers structural engineering, permitting, trades, and finish work in one place.
How it works
Our 3-step process.
Design consultation & layout options
On-site walkthrough and design session. We measure the existing home, map the current layout against your goals, and present addition options with honest trade-offs on cost and construction complexity. Written proposal follows.
Engineering & permitting
Structural engineering coordinated where additions or wall changes are involved. State and local permits pulled in-house. Foundation assessment, framing design, and mechanical rough-in locations confirmed before work begins.
Build & finish
Foundation work, framing, structural elements, roofing tie-in, mechanical rough-ins, inspections, insulation, drywall, flooring, and finish. Your dedicated project manager coordinates every trade through final inspection.
What sets us apart for room additions in the Puget Sound area.
Structural and permits under one roof
Room additions require engineering and permits — not just a contractor with a framing crew. We coordinate the structural engineer, pull the state and local permits, and manage the build as a fully integrated scope.
Design that matches your home
An addition should look like it was always part of the house. We work from your home's existing architectural details — roofline, exterior finish, interior trim — so the new space integrates, not just attaches.
One proposal for the whole scope
Additions involve structural, mechanical, and finish trades. We put the complete scope — every line item — in one written proposal so you have a clear picture before anyone picks up a tool.
FAQ
Frequently asked questions.
How much does a room addition cost?
It depends on the size, type, and finish level of the addition. A bedroom addition typically runs differently than a full first-floor extension. The written proposal lays it out line-by-line so you know exactly what you're paying for before work begins.
Do I need permits for a room addition?
Yes — virtually all room additions require permits. We pull them in-house and schedule the inspections. Work that isn't permitted creates problems at resale and may not be insurable.
Can you convert my garage to living space?
Yes. Garage conversions require insulation upgrades, electrical work, HVAC extension, and permits. We scope and price the full conversion in one written proposal.
How disruptive is a room addition?
Additions are typically less disruptive than a whole-home remodel since the new work happens largely at the exterior. Tie-in points — where the addition connects to existing rooms — involve some interior disruption that we plan around your household's schedule.
Are you licensed for structural work in Washington and California?
Yes — we are fully licensed in Washington and California, bonded, and carry full liability and workers' compensation insurance. Structural engineering is coordinated with a licensed engineer.
How long does a room addition take?
A straightforward bedroom addition typically runs eight to fourteen weeks from permit to finish. Larger additions and second-floor expansions run longer. Your written proposal gives a phase-by-phase timeline before work begins.
Service area
Where we work.
King County
- Auburn
- Bellevue
- Renton
Kitsap County
- Bremerton
Snohomish County
- Marysville
Pierce County
- Tacoma
San Diego County
- San Diego
HQ in Bellevue, WA
Ready to add space to your home?
Start with a free on-site consultation. We'll walk through the space, talk through addition options, and follow up with a written proposal covering the full scope.