Improves the existing rooms
A home additions project succeeds when it improves the rooms it touches, so we study the existing floor plan before drawing a new wall.
Add space without making the home feel divided
Home Addition Services Designed Around Your Lifestyle
RT Signature Homes Design & Build - Kitchen & Bathroom Remodeling delivers Home addition solutions that expand living space, improve functionality, and accommodate your household's changing needs with thoughtful design.
Call (206) 775-8077Design inspiration imagery · Redmond-based service
Project fit
Expand Your Living Space With a Well-Planned Home Addition
When your home no longer fits your life, a well-planned addition adds the space you need without starting over. RT Signature Homes coordinates design, structure, and finishes so new bedrooms, living areas, or suites feel like a natural part of the house and support how your household lives.
Typical scope
- Feasibility, zoning, setback, and lot-coverage review
- Architectural and structural integration
- Foundation, framing, roofing, siding, windows, and utilities
- Interior connection, circulation, and finish continuity
- Permitting, inspections, and construction sequencing
Why choose us
Why Choose Us for Your Home Addition Project
Coordinated early
Structure, utilities, and rooflines are coordinated early, which keeps the new space from forcing awkward compromises inside the home.
Feasibility first
We start with feasibility and setbacks rather than assumptions, so you learn what the property supports before investing in a full design.
Residential services
Choose the scope that best matches your home.
Each service page explains the work, planning considerations, materials, budget factors, and questions that shape a useful first conversation.
deck remodeling contractor
Deck Remodeling
Deck remodeling should rebuild the structure, flashing, and drainage before the surface. RT Signature Homes coordinates framing, decking, railings, and outdoor living features so the finished deck lasts and connects to the home.
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kitchen remodeling contractor
Kitchen Remodeling
RT Signature Homes approaches kitchen remodeling as a balance of circulation, storage, work zones, lighting, materials, and construction reality. Every visible finish depends on decisions behind the walls and inside the cabinets.
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bathroom remodeling contractor
Bathroom Remodeling
Bathrooms concentrate plumbing, ventilation, electrical work, tile, cabinetry, glass, and moisture control in a compact footprint. RT Signature Homes plans those systems together so the room performs as well as it looks.
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Home Additions
An addition changes the structure, exterior, utilities, circulation, and relationship between old and new. RT Signature Homes coordinates those decisions as a single design-build scope.
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ADU builder
ADU Design & Construction
Accessory dwelling units require careful coordination of zoning, access, utilities, privacy, parking, structure, and compact-space design. RT Signature Homes brings feasibility, permitting, and construction into one process.
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custom home builder
Custom Home Building
A custom home is a sequence of thousands of connected decisions. RT Signature Homes organizes feasibility, design, selections, permitting, estimating, construction, and closeout around a single accountable delivery process.
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Expand Your Living Room With a Thoughtfully Designed Room Addition
A thoughtfully designed room addition can open up cramped living areas and give your family room to spread out. The right design brings in daylight, improves flow, and makes the expanded space feel intentional.
Home Addition Design Ideas
Explore bump-outs, great-room expansions, and connected living spaces, with massing, rooflines, openings, and material transitions planned so old and new feel like one home.
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Exterior integration
Design a Home Addition That Complements Your Property's Architecture
An addition should look like it was always part of the house, so we design it to respect the proportions, rooflines, and weather-protection strategy of the existing home.
Roof pitch, eave lines, siding, window styles, and trim are matched carefully, and roof drainage, flashing, and foundation connections are detailed as part of the design rather than left as cleanup.
Whether it is a main-floor bump-out, a second-story addition, or a new primary suite, the goal is an exterior that reads as original to your property's architecture.
Interior connection
Improve Your Home's Layout With a Seamlessly Integrated Room Addition
The best additions improve the rooms they touch, so we plan the connection between old and new around circulation, daylight, and how you move through the home.
The opening between existing and added space is designed to keep sightlines, flow, and furniture placement comfortable, with heating, cooling, and electrical capacity accounted for from the start.
A seamlessly integrated room addition solves the larger layout problem rather than simply attaching square footage, so the whole floor plan works better.
Home office additions
Add a Dedicated Home Office That Works for Focused Days
When working from home becomes permanent, a dedicated office addition can give you quiet, separation, and a professional backdrop that a repurposed corner cannot. We plan the workspace around privacy, acoustics, and how you actually work.
Natural light, electrical and data planning, and built-in storage are designed in from the start, and the addition is integrated with the existing home so it feels original rather than attached. We also help you weigh building a new addition against converting an existing room, since the best choice depends on your space, budget, and goals. If you need a fully separate workspace, an accessory dwelling unit may be a better fit.
How the work moves
A process that keeps decisions ahead of construction.
Discovery and site assessment
We clarify goals, review existing conditions, identify constraints, and determine what needs deeper investigation before a scope is written.
Design and pre-construction
Layout, materials, trade requirements, permits, allowances, schedule factors, and decision deadlines are coordinated into one buildable plan.
Construction and completion
The work is sequenced, protected, inspected, communicated, and closed out with a final walkthrough and documented completion items.
Budget and schedule orientation
Scope the variables before suggesting a number.
Useful early guidance identifies what changes the investment and timeline. A responsible project range follows an assessment of the property, scope, finish expectations, and delivery constraints.
Common factors
- Existing structural and mechanical conditions
- Project size, layout changes, and finish level
- Permit, engineering, and design requirements
- Material availability and product lead times
- Site access, protection, and project sequencing
Local coverage
Find remodeling services for your community.
Explore local planning and all ten residential service lines across 30 communities around Redmond.
- Redmond remodeling services
- Bellevue remodeling services
- Kirkland remodeling services
- Sammamish remodeling services
- Woodinville remodeling services
- Issaquah remodeling services
- Bothell remodeling services
- Newcastle remodeling services
- Mercer Island remodeling services
- Renton remodeling services
- Seattle remodeling services
- Shoreline remodeling services
- Lake Forest Park remodeling services
- Kenmore remodeling services
- Lynnwood remodeling services
- Mountlake Terrace remodeling services
- Brier remodeling services
- Mill Creek remodeling services
- Everett remodeling services
- Snohomish remodeling services
- Duvall remodeling services
- Carnation remodeling services
- Fall City remodeling services
- Snoqualmie remodeling services
- North Bend remodeling services
- Medina remodeling services
- Clyde Hill remodeling services
- Hunts Point remodeling services
- Yarrow Point remodeling services
- Beaux Arts Village remodeling services
Questions homeowners ask
Home Additions FAQs
What is the difference between a room addition and a home addition?
A room addition typically creates one specific space, such as a bedroom, office, or family room. A home addition is a broader term that can include one room or multiple connected spaces designed to expand the existing home's footprint.
Can I add a bedroom without making my existing living areas feel smaller?
Yes, a well-planned bedroom addition can create extra space while preserving the functionality of your current rooms. The design should consider the property's available space, access points, natural lighting, and how the new room will connect to the existing layout.
What should I consider before adding a second story to my home?
A second-story addition requires careful evaluation of the existing foundation, structural framing, roof, and load-bearing elements. Building codes, stair placement, utility changes, and the project's effect on existing rooms should also be assessed before finalizing the design.
Can a home addition include a bathroom or expanded kitchen?
Yes, a home addition can incorporate a bathroom, kitchen expansion, or other functional living areas. These projects may require plumbing, electrical, ventilation, and structural modifications, so coordinating the layout and utility requirements early is important.
How can I make a new home addition look like part of the original house?
Matching rooflines, exterior materials, window styles, trim, flooring transitions, and interior finishes can help create a cohesive appearance. Careful planning of room connections, ceiling heights, and natural light also helps the new space feel integrated rather than added on later.
Start a practical conversation
Start with feasibility, not assumptions.
Tell us how your household needs more space and what limitations you see on the property.