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    Custom Sunrooms
    and Room Additions
    Designed around how you live. Built to feel like it has always been part of your home. VIEW SERVICES

    Custom Sunrooms & Room Additions

    Designed around how you live. Built to feel like it has always been part of your home.

    50+ Years of Experience

    Fully Permitted Construction

    Custom Built for Your Home

    Greater Eastside Service Area

    Get Your Free
    VIRTUAL ESTIMATE

      Custom Design
      Tailored to You

      Seamless
      Integration

      Year-Round
      Comfort

      Quality
      Craftsmanship

      Local Team.
      Personal Service.

      OUR SERVICES

      Custom Sunrooms, Room Additions, and ADUs in Redmond and the Greater Eastside

      Providing custom design and build services throughout Bellevue, Kirkland, Redmond, Sammamish, Issaquah, Mercer Island, Newcastle, Woodinville, and Bothell.

      Over 50 Years of Designing and Building Spaces That Feel Like Home
      Custom Sunroom Installation Redmond CA

      Sunrooms

      Bright, comfortable spaces designed for natural light and year-round use.

      Traditional Sunrooms & Room Additions Washington

      Room Additions

      Custom-built additions that expand your home and blend seamlessly with your layout.

      Custom Sunroom Installation Redmond CA

      ADUs

      Flexible living spaces designed for family, guests, or long-term use.

      Custom Sunroom Installation Redmond CA

      Outdoor Living

      Covered patios and outdoor spaces designed for comfort, function, and everyday use.

      Over 50 Years of Designing and Building Spaces That Feel Like Home

      Sun Spaces has been helping homeowners across the Greater Eastside create thoughtful, well-built living spaces for more than 50 years.

      From custom sunrooms and room additions to ADUs and outdoor living spaces, every project is designed with the same goal in mind. Create a space that feels natural, works for your daily life, and holds up over time.

      Rather than offering one-size-fits-all solutions, each project is built around your home’s layout, structure, and long-term use. The result is a finished space that looks like it belongs and feels right from the moment it is complete.

      OUR SERVICES

      A Simple, Collaborative Process

      Virtual Assessment

      We start with a conversation about your goals, budget, and ideas.

      Custom Design

      We design a solution that fits your home and how you plan to use it.

      Planning & Permits

      We handle the details so your project moves forward smoothly.

      Expert Construction

      Your space is built with attention to detail and long-term quality.

      RECENT PROJECTS

      Inspiration for Your Next Project

      FREQUENTLY ASKED QUESTIONS

      Helpful information for homeowners planning a new space.

      A sunroom is designed to bring in natural light and connect your home to the outdoors, while a room addition is a fully integrated expansion of your living space. Both can be custom designed to match your home.

      Yes. A properly designed sunroom can be used year-round with the right materials, insulation, glass, and ventilation. Sun Spaces designs sunrooms for comfort, function, and long-term use.

      Most room additions and ADUs require permits. Sun Spaces helps guide the planning and permitting process so your project is designed and built to meet local requirements.

      Timelines depend on the size, design, permitting, and complexity of the project. During your assessment, Sun Spaces can help you understand the expected steps and timeline for your specific space.

      Cost depends on the size, materials, design details, site conditions, and project scope. The best way to get accurate pricing is to start with a free virtual assessment.

      Sun Spaces serves homeowners throughout the Greater Eastside of King County, including Bellevue, Kirkland, Redmond, Sammamish, Issaquah, Mercer Island, Newcastle, Woodinville, and Bothell.

      The virtual assessment is a conversation about your home, your goals, and the type of space you want to create. It helps determine what may be possible before moving into design and planning.

      Outdoor living spaces may include covered patios, outdoor kitchens, seating areas, and backyard spaces designed for comfort, function, and everyday use.

      Ready to get started on your project?

      We are different than your average “construction” company as we offer our customers everything they need “under one roof”.