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KOI BUILD CO

Deck or Porch, Deck or Porch Repair, Exterior Home or Structure Paint or Stain,

About us

With over 30 years of experience, the team at KOI Build Co. has set the standard for high-end residential remodeling across Tacoma, Olympia, and the South Puget Sound. We combine decades of structural expertise with modern design principles to build amazing decks and patio covers, custom ADUs, chef's kitchens, spa-like bathrooms, and full-scale home additions that elevate both your lifestyle and property value. The KOI Standard: Single-Source Accountability: From initial blueprints and city permits through construction and final cleanup, one master team handles it all. Decades of Proven Expertise: 30+ years navigating local South Sound building codes, permitting, and custom craftsmanship. No Financial Surprises: Precise, upfront pricing with dependable project timelines. Licensed, Bonded, & Insured (WA). Elevate your living space with a builder you can trust implicitly. Reach out today for your free consultation and written proposal.

Business highlights

9 years of experience

Amenities

Free Estimates

Yes

Warranties

Yes

Accepted Payment Methods

  • CreditCard
Reviews
4.822 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
95%
4
0%
3
0%
2
0%
1
5%

Filter reviews by service

Showing 1-22 of 22 reviews
Diane C.
Oct 2026
5.0
Deck or Porch - Build or Replace- For Business
$22,000
We are so glad we hired this company to do our deck. Chris and Thomas always answered our questions and calls promptly. They did a beautiful job on our 30-year old deck and made it look brand new and better than ever. They worked with us to keep costs down and quality up. I would highly recommend this company to anyone considering work done on their home.

Stacy H.
Oct 2026
5.0
Deck or Porch
AMAZING design ideas I never would?ve thought of! Incredibly easy to work with, great communication, kind but also very straight forward which is refreshing in today?s world.

Jan H.
Oct 2026
5.0
Deck or Porch Repair
Chris and his crew did a great job repairing the joists on our deck. They completed the work quickly, made sure it was all done to my satisfaction and cleaned everything up afterwards.

Mike M.
Oct 2026
5.0
Google Review
Koi’s Thomas was so kind and helpful and truly seemed to care about getting the small job we needed done … correctly!

Phil V.
Oct 2026
5.0
Google Review
We were at the beginning stages of some external home refresh work and Thomas helped us get educated on some recommended next steps based on their free consultation. It was very helpful and it gave me the confidence to continue with the project. Thomas was very professional and gave a full assessment of our project areas in a quick a precise manner. We look forward to hiring KOI Build Co for future home projects.

Laurie U.
Oct 2026
5.0
Google Review
Chris Johlfs and his team are very professional, skilled, thorough and reliable. Koi Construction’s program provides clear, detailed plans, contracts, billing agreements and activity along with daily progress reports with accompanying photos. We highly recommend this company.

Tara J.
Oct 2026
5.0
Google Review
I Had a small area of deck that was rotting and needed to be replaced. Thomas Hansen made all arrangements, and Irving did the labor/work. I couldn't be happier with the outcome. Thomas and Irving were both very professional, courteous, punctual, and I told them that your company is my forever GC. If there were 10 stars, I would rate them that high. So so happy with the results.

Chad N.
Oct 2026
5.0
Google Review
As a real estate agent, I often work with companies on tight timelines. KOI stepped up and went above and beyond to address the inspection contingency items. I would recommend them to any homeowner looking for top-notch craftsmanship and service.

Adam J.
Aug 2026
5.0
Exterior Painting and Staining Service
$4,800
Things went well.
Response from KOI BUILD CO
"Thanks for the review, Adam. Good fence to work on. We stained the runs and all gates, swapped out the lumber that was past saving, and cleaned and sealed the 6x6 posts, so they hold up through the wet season. Glad it turned out the way you wanted. When you're ready to take on the house body and trim, we'll be here. Chris Johlfs, KOI Build Co."

Dave M.
Apr 2026
5.0
Deck or Porch
Chris owner of his family construction firm was a great person and great help throughout the entire process which proved to be much more extensive than originally thought. Chris made sure that proper procedures were being followed and we understood each step of the way what was needed and costs involved. I felt very comfortable working with Chris because you could sense he was a good person and really cared about his work and company. I highly recommend Koi construction for any of your homes needs. They do all kinds of work and do it well. My over all sense was these were good people and were cost conscience.

Susan B.
Mar 2026
5.0
Deck or Porch
Working with KOI Build was easy and stress free. I found Chris, the owner, to be smart, creative, and personable. He came up with options and solutions for my new deck that were aesthetically pleasing and budget friendly . The crew that worked replacing my backyard deck worked beautifully, also contributing suggestions that brought my project to completion, also beautifully.l

Woody W.
Sep 2024
5.0
Kitchen - Remodel
Yes, I recommend this pro
The whole experience was excellent. Chris when to give us a bid. He was very knowledgeable. He told use about the triangle of stove, fridge and sink and flow. He suggested a long narrow window to replace the tile backsplash on an outside wall. It was a great idea. When sit at the new bar between the kitchen and the living room we look out into our backyard. Itâ s beautiful. The guys that did the work are extremely work oriented. They are constantly working. They were thorough, knowledgeable and open to our suggestions and requests. We wanted an additional can light no problem. They were great. They cleaned up every day before they left. They would tell use when they were going to arrive and what they planned to accomplish that day. I have old siding on the outside of my house. They matched it perfectly when eliminated a window. The price of the cabinets was a lot more reasonable the other bids and theyâ re beautiful. What I mentally pictured in my mind on how it would look and the ease of preparing meals in the new kitchen were so wrong. Itâ s at least 10 times better. It still has the same physical dimensions but how itâ s played out. It seems so much bigger. I highly recommend them for any project you need done

Woody W.
Aug 2024
5.0
Kitchen - Remodel
Yes, I recommend this pro
Awesome customer service relating to design, demo, and total reconstruction of our kitchen. We love our newly designed kitchen and highly recommend Koi Construction and their team.

Billie A.
May 2024
5.0
Yes, I recommend this pro
I hired Koi Construction to paint the interior of my house, install floors and lights in my kitchen. They were prompt, quick and clean. They took the time to cover all my furniture before painting. I had already chose the color flooring I wanted. But the owner Chris had suggested a different color. I went with his suggestion and Iâ m so happy I did. The color looks great! He also suggested adding more lights in my kitchen. Iâ m so glad I did. My kitchen had more dark spots than I realized. Now I can see everything! I will be hiring Koi Construction for future projects.

Steph C.
Feb 2024
5.0
Kitchen - Remodel
Yes, I recommend this pro
An absolute pleasure to work with. Very honest and very easy to work with along with reasonable pricing and great communication at every step of the project. Stands behind their work! Highly recommended for any project.

Robert H.
Feb 2024
1.0
Kitchen - Remodel
$20,000
Hk Design threatened me and I did not fire the owner because it was a big project. I was polite in talking to Chris about my ceiling paint job and he blew up at me. I mean really. How do you hire someone else when you paid so much money to them. Yes, I see the 5 star reviews for this company, but the owner lied to me on many occasions with regards to his availability, and finishing what he had started. It got so bad where I wanted to call the cops on his shady practices. You have my money, fix the job and make it right, or give me my 200.00 that you say that will fix the job. I should not have to be this angry, and I should not have to leave a bad not here fir HK Design, but it's just aweful, just aweful.

Anne S.
Nov 2022
4.5
Exterior Painting and Staining Service
Yes, I recommend this pro
Chris was amazing and working with us to get this done before the bad weather rolled in.

Carol B.
May 2022
5.0
Major Renovation Multiple Room Service
Yes, I recommend this pro
The owner personally came out and explained everything that they were going to do and the job was done expertly I would recommend this company over and over again!

Jael Q.
May 2022
5.0
Major Renovation Multiple Room Service
Yes, I recommend this pro
$35,000
Awesome team they worked on our vacant house and remodeled it before move in , checked in everyday after hours and their team always took the time to clean and organize before they left for the day .final product was great and pricing was very fair vs other contractors, would definitely recommend chris and the team again and again !!!

Israel R.
May 2022
5.0
Exterior Home or Structure Paint or Stain
Yes, I recommend this pro
$5,000
Chris and the crew were great!!! very responsible with our home and did an amazing job with our exterior paint. Honest and trustworthy people

Antione D.
May 2022
5.0
$3,400
Very professional, always on time, has went the extra mile to ensure my family and I was satisfied. This is one of the best companies I hired. Will recommend them to my friends and family. Please continue to support families. Thank you.

John H.
May 2022
5.0
Yes, I recommend this pro
$4,000
Most trustworthy employees! Owner kept in close communication with me regarding appointments and progress.

Licensing

Insured

Licensed*

Trade License Number

KOIBUBC763RE

Trade License Expiration

12/10/2026

State Contractor License Requirements

All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our Find Licensing Requirements page.

*Contact business to see additional licenses.

FAQ

KOI BUILD CO is currently rated 4.8 overall out of 5.

Monday: 7:00 AM - 8:00 PM Tuesday: 7:00 AM - 8:00 PM Wednesday: 7:00 AM - 8:00 PM Thursday: 7:00 AM - 8:00 PM Friday: 7:00 AM - 5:00 PM Saturday: 8:00 AM - 6:00 PM Sunday: 8:00 AM - 6:00 PM

KOI BUILD CO accepts the following forms of payment: CreditCard

Yes, KOI BUILD CO offers free project estimates.

No, KOI BUILD CO does not offer eco-friendly accreditations.

No, KOI BUILD CO does not offer emergency services.

Yes, KOI BUILD CO offers warranties.