Project Transformation: Before & After

Dated Renton Home Addition Remodel Before - Grand Building ConstructionBefore

Original exterior and limited living space prior to construction.

Stunning Renton Home Addition Renovation After - Grand Building ConstructionAfter

Seamless and spacious home addition expanding the living area with premium structural craftsmanship.


Project Overview

The homeowners in Renton, WA, approached Grand Building Construction with a common dilemma: they loved their home and neighborhood but were quickly outgrowing their existing space. Their primary bedroom felt cramped, and they dreamed of a more spacious and functional retreat. The goal was to create a seamless home addition that would not only expand their primary bedroom by approximately 250 square feet to include a spacious walk-in closet and a full bathroom, providing the perfect blend of comfort and luxury.

Our team faced the challenge of designing and constructing an addition that felt like a natural extension of the original home. This meant meticulously matching the exterior siding, roofing, and architectural style to ensure a cohesive and seamless look. Inside, the focus was on creating a tranquil and private oasis. We worked closely with the homeowners to select materials and finishes that reflected their personal style while maximizing the functionality of the new space. The transformation resulted in a beautiful and spacious primary suite that exceeded the homeowners’ expectations, providing them with the extra room they needed without the hassle of moving.

Project Details

Home Addition Renton
Project TypeHome Addition
LocationRenton, WA
Project Cost$170,000
Project Duration90 Days
Permits RequiredYes (Building, Electrical, Plumbing)
Year Completed2023

Materials & Finishes Used

  • Flooring: Engineered hardwood flooring – 7-inch wide plank oak in a natural finish
  • Bathroom Tile: Large format porcelain tile in a marble-look for the shower and floor
  • Countertops: Calacatta quartz countertops by Caesarstone for the bathroom vanity
  • Cabinetry: Custom shaker-style vanity in a deep navy blue finish
  • Hardware: Matte black cabinet hardware and plumbing fixtures by Amerock
  • Lighting: Recessed LED lighting throughout, with designer sconces flanking the vanity mirror
  • Windows: Milgard Tuscany® Series vinyl windows for energy efficiency and a clean look
  • Exterior Siding: James Hardie fiber cement siding, color-matched to the existing home

Our Process

  1. Initial Consultation: We started with a detailed consultation to understand the homeowners’ vision, needs, and budget. We discussed their goals for the new space and conducted a thorough assessment of their property.
  2. Design & Planning: Our design team created detailed architectural plans and 3D renderings to help the homeowners visualize their new primary suite. We collaborated on material selections and finalized the project scope.
  3. Demolition & Construction: Once the permits were secured, our skilled craftsmen began the construction phase. This included foundation work, framing, and the careful demolition of the exterior wall to connect the new addition.
  4. Installation & Finishing: With the structure in place, we moved on to the interior and exterior finishing. This included installing the new bathroom, walk-in closet, flooring, and lighting, as well as matching the exterior siding and roofing.
  5. Final Walkthrough: We concluded the project with a final walkthrough with the homeowners to ensure every detail was perfect and that they were completely satisfied with their beautiful new space.

Permitting & Code Compliance

For this Home Addition in Renton, WA, we secured building, electrical, plumbing permits to ensure full safety and code compliance. Grand Building Construction manages the entire permitting process from application to final inspection, ensuring your project is completed to the highest standards and meets all local regulations. This gives our clients peace of mind, knowing their renovation is built to last. Learn more in our Remodeling Cost Guide.

Why Choose Grand Building Construction?

At Grand Building Construction, we are committed to providing our clients with the highest quality craftsmanship and an exceptional customer experience. We believe in honest work, transparent pricing, and open communication throughout every step of the remodeling process. Our team of experienced professionals is dedicated to bringing your vision to life, whether it’s a small bathroom update or a large-scale home addition. We pride ourselves on our flexibility and our ability to work within your budget to create a space you’ll love for years to come. Check out our before and after gallery to see more of our work.

Ready to Start Your Remodeling Project?

Contact us today for a free consultation and let’s discuss how we can transform your home.

(206) 492-8220
Request a Free Consultation

Planning a project like this one? Learn more about our home remodeling services in Renton and what our team can do for your home.

Home Addition FAQs

Do I need a permit for a home addition in Renton, WA?

Yes — home additions require permits, and most require plan review before construction begins. Grand Building Construction coordinates the permitting process and required inspections as part of your project.

Can I live in my home during a home addition?

In most cases, yes. An addition is built outward from your existing home, so much of the work happens outside your current living space; we plan the tie-in stages with you to minimize disruption.

What affects the cost of a home addition?

The biggest factors are the size of the addition, foundation and roofing requirements, whether plumbing or electrical systems are extended, and interior finish selections. A free in-home estimate is the most accurate way to price your specific project.

How is a home addition connected to my existing home?

The addition is built on its own foundation, framed to complement your home, and opened into the existing space once the new structure is weather-tight, so your home stays secure and dry during construction.

Get a Free Estimate for Your Home Addition

    What Our Customers Say

    EXCELLENT
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    Based on 94 reviews
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    Lonnie Beal profile picture
    Lonnie Beal
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    Had a nasty looking tub and surround. Got an acrylic wider tub and surround installed, they did the job in about 1.5 days, got a great price on the job. Left the area good and clean, no damage to anything. I would use them again.
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    Shirley Li profile picture
    Shirley Li
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    We hired a contractor in May to remodel our kitchen. He promised the project would be completed in three weeks. Unfortunately, after a month, less than 40% of the work had been completed. He disappeared several times without notice, and our calls and messages often went unanswered. Eventually, we decided to hire another contractor to finish the job. We are incredibly grateful that we found Grand Building Construction. Joshua and his team, Wei and Ken, completed the remaining 60% of our kitchen remodel in just five days. They ordered and installed the countertops and backsplash, corrected the mistakes left by the previous contractor, installed the flooring, completed the painting, and finished the lighting installation. Joshua, Wei, and Ken were hardworking, detail-oriented, professional, and communicative throughout the entire process. They kept us informed every step of the way, and their craftsmanship and dedication exceeded our expectations. They turned what had become a stressful and frustrating experience into a beautiful, finished kitchen that we absolutely love. We truly appreciate everything Joshua and his team did for us. Thanks to Grand Building Construction, we finally have our dream kitchen. We highly recommend them to anyone looking for a reliable, skilled, honest, and trustworthy contractor.
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    Matt Eary profile picture
    Matt Eary
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    I recently had my master bathroom remodeled by Grand Building Construction, and I couldn’t be happier with the results. They helped us transform a dated, inefficient space with a bulky corner tub into a modern, spa-like walk-in shower. I came into this project with a very clear, specific vision of what I wanted, and the team was incredible to work with. They were remarkably flexible and genuinely amenable to my ideas, working closely with me to ensure every detail aligned with the final look I had in mind. Beyond their design flexibility, I was truly impressed by their technical expertise—particularly the care they took with the plumbing rerouting and the advanced waterproofing systems. They kept the project moving efficiently, finishing everything on schedule in just one week. The quality of the finished space—from the precise large-format tile work to the installation of the matte black fixtures—is outstanding. If you’re looking for a professional, collaborative team in the Renton area that listens to your vision and executes it to a high standard, I highly recommend Grand Building Construction.
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    Allison Owen profile picture
    Allison Owen
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    Josh, Wei, Ken and team did a great job on my kitchen remodel. They were very communicative, had fair prices, and were detail oriented. We were able to work together to make our kitchen goals happen. I would not hesitate to hire them again for another construction project! Thank you!
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    Coco Merlin profile picture
    Coco Merlin
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    This review is far overdue. We worked with Emil to renovate our two bathrooms, kitchen, relevel a sunken living room floor, create a pantry, and a few other things for my house Kirkland. Emil and his team provided quality work. Grand Building I has a lot of experience and guided us new homeowners through our extensive renovation. The team was punctual and extremely professional. They always cleaned up at the end of the workday. We would work with them again in the future.
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    Mike Larrenaga profile picture
    Mike Larrenaga
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    I recently hired Grand Building Construction for a kitchen remodeling and I couldn’t be happier. The quality of the workmanship is outstanding, and the team showed great integrity by staying honest about timelines and costs. Communication was clear and frequent, so I always knew what was happening. They arrived on time every day (often working 6 or 7 days a week) and finished the project within the budget, which made the price feel very fair. I especially appreciated how they respected my home and kept the work area clean. Josh and the team were open and communicated frequently throughout, always finding a way to incorporate our design choices. I would definitely work with GBC again and am recommending them to anyone i know looking to do a renovation.
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    azucena solano profile picture
    azucena solano
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    I recently decided to remodel my master bathroom because it was seriously outdated, since the 70s! Working with Emil so far has been a pleasure. We got creative together, figuring out solutions for things that mattered to me. His communication and attention to detail were what I really liked. From the beginning of the project, Emil made sure I was in the loop and part of every decision making process. I really appreciated that, especially since I can be quite picky about what I want. The bathroom is still in progress but so far I absolutely love the transformation! Thank you guys! I must say the work has been on time, super clean, the crew is very respectful and I appreciate their hard work. We're still in the process right now and so far this is my 5 star review.
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    Ayleen Magana profile picture
    Ayleen Magana
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    Josh helped us turn our old tub into a modern walk in shower, and it completely changed the feel of our bathroom. He suggested a tile pattern I never would have thought of, and it looks incredible with the lighting. Every evening before leaving, he cleaned up so well you could barely tell work was being done. The water pressure feels stronger now and the glass enclosure makes the whole room brighter. Couldn’t be happier with how it came out.
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    Jessica Lain profile picture
    Jessica Lain
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    I had them convert my tub into a walk-in shower, and it’s easily the best upgrade I’ve done. The tile work is stunning, and the glass enclosure makes the whole bathroom feel bigger. They even added a rainfall showerhead — total game changer.
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    Daniela Hernandez profile picture
    Daniela Hernandez
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    Grand Building Construction in Bellevue did our bathroom remodel after years of putting it off, and I wish we had done it sooner. The crew removed old flooring, updated the plumbing, and created a gorgeous walk-in shower with glass doors. They also added a double vanity that makes mornings so much easier. The project was seamless, and their communication made the whole process stress-free. Our new bathroom is both practical and stunning.