A BETTER REMODEL
BEGINS WITH KOI
Olympia's trusted design-build experts.
Home Remodeling Contractor in Olympia, Lacey, Tumwater & South Puget Sound WA
KOI Build Co is a trusted home remodeling contractor serving Olympia, Lacey, Tumwater and communities across South Puget Sound, WA. From custom kitchen remodels and luxury bathroom renovations to full home transformations, additions, decks and more, our licensed and insured team delivers exceptional craftsmanship with clear communication at every step.
With over 20 years of experience in the South Puget Sound region, KOI Build Co helps homeowners upgrade and reimagine their spaces with a proven design-build process. We handle everything from initial consultation and detailed design through permitting, construction and final walkthrough, so your Olympia-area remodeling project stays on time, on budget and aligned with your vision.
Whether you need a full kitchen remodel in Olympia, a home addition in Lacey, a deck in Tumwater or a whole-home renovation anywhere in South Puget Sound, KOI Build Co provides tailored solutions and premium materials. Our team focuses on functionality, durability and aesthetic details, creating spaces that look beautiful, perform well and add long-term value to your home.
Latest Project
Recently Completed
Pierce County, WA· Completed September 2026
Custom She-Shed & Deck
A backyard studio on a waterfront lot, with a standing-seam metal roof, a windowed dormer and French doors that open onto a new wood deck with wide steps down to the lawn. The homeowner sent us this photo the week it was finished.
- Backyard studio
- Metal roof
- French doors
- Wood deck
Our Philosophy
Built on Integrity.
Driven by Excellence.
As the owner of KOI Build Co, I approach every project like it’s my own home—no shortcuts, clear communication, and craftsmanship that holds up for decades.
My philosophy is simple: do it right the first time, be honest about costs and timelines, and sweat the details so you don’t have to. I’m obsessed with process and planning, but I never forget that we’re ultimately building spaces for real families, not just floor plans. Personally overseeing each project from design to final walkthrough.
Real Stories
What Our Homeowners Say
“Chris, owner of KOI build is a great guy. He personally made sure that the reconstruction of our deck was as we wanted and made sure his workers were following the things we expected. They did a great job on a hard project. All supplies and costs were explained and options given. After completion the work site was thoroughly cleaned everything hauled away. Everyone working on the project was very personable. Chris went out of his way to make sure we were happy with the results even coming over and doing painting on a Sunday to help out. This is a good company with very nice and helpful people. I would highly recommend them for any home improvement needs.”
Deck construction
“I have worked with KOI on multiple projects and will definitely continue to do so. His drive for excellence and perfection is amazing, great communication for everything going on with projects. for the quality of work this company provides they are decently priced and everything is laid out in front of you for a clear well managed project. I would highly recommend reaching out to Chris if you are looking to do any project, big or small.”
Deck construction · Demolition · Roof repair · Exterior painting
“Chris Johlfs and his team are very professional, skilled, thorough and reliable. [Their] program provides clear, detailed plans, contracts, billing agreements and activity along with daily progress reports with accompanying photos. We highly recommend this company.”
Deck construction · Exterior painting
“I was very impressed with Koi, I had the pleasure of working with Thomas. We were able to communicate our vision with him and he was able to see what we needed. Great communication, honest and straightforward folks! Highly recommend!!”
“Chris and his crew are very friendly and professional. They did an awesome job. The house looks great. They made sure all garbage and paint was cleaned up. Very pleased with this company. Would use them again.”
Exterior painting
“The KOI team were a pleasure to work with. The final house painting project was perfect. They arrived on time and cleaned up all waste after the job was finished. I would recommend them to anyone wanting house painted.”
Exterior painting
Why Trust KOI
Built on Trust & Excellence
Over 20 years of experience serving South Puget Sound with integrity and quality craftsmanship.
Licensed & Insured
Fully licensed in Washington State with comprehensive insurance coverage
20+ Years Experience
Two decades of owner-led home remodeling expertise
Locally Owned
Proudly serving Olympia and the South Puget Sound region
A BBB Rating
Rated A by the Better Business Bureau
Family-Owned
A family business treating every home like our own with quality and precision
100% Satisfaction
We don't stop until you're completely happy with the final result
Your Family's Story
Begins at Home
Let our trusted design-build experts create your perfect setting. From early planning through a lifetime of memories, our team is committed to delivering exceptional results, unparalleled service, and a remodeling experience you can enjoy.
What We Do Best
Expert Home
Remodeling Services
As Olympia's trusted remodeling company, we deliver exceptional craftsmanship and innovative design solutions. From kitchen renovations to complete home transformations, our experienced team brings your vision to life with precision and care.
Custom Kitchen Remodeling
Transform your kitchen into a stunning culinary space with premium materials.
Luxury Bathroom Renovations
Create a spa-like retreat with elegant fixtures and modern design.
Whole-Home Transformations
Complete home remodels that maximize space and functionality.
Energy-Efficient Upgrades
Reduce utility bills with sustainable, eco-friendly home improvements.
Get Better Results From
A Proven Process
The process of remodeling can and should be enjoyable! When you find the right team for your project, one that can guide you through every step of a finely tuned process, your design build remodeling experience can be as remarkable as your beautiful, new space.
Consultation
We listen to your vision and provide honest assessment.
Design
Our team creates detailed plans and 3D renderings.
Planning
We handle permits, materials, and schedule.
Construction
Skilled craftsmen bring your vision to life.
Completion
Final walkthrough and your complete satisfaction.
Transformations
See the Difference
Real projects. Real results. Real transformations from our satisfied homeowners.
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Modern Kitchen Transformation
Olympia, WA
Complete kitchen remodel with custom cabinetry, quartz countertops, and premium appliances.
Timeline
6 weeks
Investment Range
$45k - $65k
Key Features
Frequently Asked Questions
Everything you need to know about working with KOI Build Co.
Project timelines vary based on scope and complexity. A kitchen remodel typically takes 4-6 weeks, while a full home renovation may take 8-12 weeks. During your free consultation, we'll provide a detailed timeline specific to your project.
Yes! We provide free, no-obligation estimates for all projects. We'll visit your home, discuss your vision, take measurements, and provide a detailed quote with transparent pricing.
Absolutely. KOI Build Co is fully licensed, bonded, and insured in Washington State. We carry comprehensive liability insurance and workers' compensation for your peace of mind.
We proudly serve Olympia, Lacey, Tumwater, and all of South Puget Sound. Contact us to see if we serve your specific location.
Yes, we manage all necessary permits and coordinate with local building departments. We ensure every project meets or exceeds code requirements.
We offer flexible payment plans. Typically, we require a deposit to begin, with progress payments tied to project milestones. Final payment is due upon completion and your satisfaction.
Yes, we stand behind our craftsmanship with a 2-year workmanship warranty on all projects. Materials also carry manufacturer warranties.
Simply call us at (253) 348-1847 or fill out our contact form. We'll schedule a free consultation to discuss your project and provide an estimate.
Still have questions?
We're here to help
Visit Us
We're Located in Olympia, WA
Proudly serving homeowners throughout South Puget Sound from our home base in Washington's capital city.
Olympia, Washington
Serving South Puget Sound & Surrounding Areas
Popular Service Areas
Let Our Experts
Answer Your Questions
Have questions about your project? Get a free consultation and discover how we can transform your home.
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