503 Builders LLC
Top Pro
Licensed
Licensed
Free on-site estimate
Responds in about 4 hours
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Projects and media
Projects and media
About
I have always had a passion for construction, design and increasing home values.
From my personal bad experiences with sub par contractors that take on too many jobs or has a sloppy finish, I figured our team can do better than the industry "standard".
Being Japanese in this industry, we focus on laser like precision and take pride in our finish carpentry.
Fast, Good, Affordable, you get to pick all three.
Overview
Current Top Pro
Hired 56 times
Serves Troutdale, OR
Background checked
License verified
5 employees
6 years in business
Business hours
This pro hasn't listed their business hours.
Payment methods
This pro accepts payments via Cash, Check, Credit card, PayPal, and Venmo.
Social media
Top Pro status
Top Pros are among the highest-rated, most popular professionals on Thumbtack.
2025
Credentials
License verified
Contractor – Residential General
License state: OR
Background checked
Passed by Kohei Takazawa on Jan 18, 2022.
Services offered
Project scope
Property type
Residential
Commercial
Reviews
Customers rated this pro highly for work quality, responsiveness, and professionalism.
Exceptional 5.0
47 reviews
5
98%
4
2%
3
0%
2
0%
1
0%
Customer photos
Customer photos
Read reviews that mention:
Richard S.
Dec 4, 2025
Hired on Thumbtack
503 Builders (not to be confused with 503 Construction), run by Mr. Kohei Takazawa, did superior work on a very complex emergency house repair for me. The problem with the house was extreme: a deck above the flat roof of the sunroom at the back of the house was concealing a major leak in the roof (and lower ceiling), which had actually started bowing, letting water build up. Unfortunately, the problem only became apparent when a leak in the sunroom developed. Opening the ceiling, we discovered massive dry rot and even mold. And the ceiling was ready to collapse. The deck, railing, roof, ceiling rafters, and ceiling drywall all had to be removed. And, it was already October (2025) and heavy storms had started.
I talked to Kohei over the phone, and he came out the following day, a Friday, to inspect the property and give an estimate. I received the estimate which was fair (less than I had expected) that day. Work began the following Monday! The back of the house was covered under a large tarp, which they worked under, often in heavy rains. Kohei's workers were professional and extremely productive.
By the following Saturday, just 6 days later, all new rafters had been placed in the ceiling and a new TPO roof installed, replacing the previous torch down roof. After the roof was installed, Kohei had a second team install a new and now composite deck. This was complex given the structure of the back room. After the deck was installed, they added and painted new sheetrock on the ceiling in the lower room. Kohei then had a metal fabricator (Luigi), really an artist, hand craft and install a new metal hand railing, which is beautiful.
Summary: Kohei and his team were skilled, professional, and hardworking. They got the job done in record time. The quality of the work is impressive and far surpassed what I was hoping for. They adapted their schedule to the terrible October weather. They absolutely stuck to their estimate, which was fair to begin with. The communication was good. And they calmed my panic.
If I could give 503 Builders a higher rating than five, the top number, I would. I definitely plan to use them for future jobs.
Details: I'm just starting • Addition • Replace parts of existing structure • Repair existing structure • Yes, load-bearing structures are involved • Less than 500 sq ft • Home
General Contracting
Josh S.
Sep 23, 2025
Hired on Thumbtack
Kohei’s team did a great job. Attention to detail was on point throughout.
They removed an old concrete patio and built a new deck with a finished awning. It looks amazing. They also built an extremely well-built fence on the backside of the yard.
Kohei was great at communicating throughout any weather delays or other issues.
Highly recommended. We will return as customers
Details: New deck or porch construction • No existing plans, but I know what I want • Residential
Deck or Porch Remodel or Addition
Jodi A.
Dec 9, 2024
Hired on Thumbtack
We hired Kohei and his team for several projects, and everything turned out amazing. They completely changed the layout of our yard including a retaining wall, fence and plants. They also laid a flagstone patio, a concrete patio and assembled a gazebo at another property. They remodeled a small guest house as well.
Kohei is a great communicator and always keeps you apprised of the timeline and next steps. The work is done in a reasonable time frame as well. We’ve been happy with our experience!
Details: Sketches or a basic idea • New custom construction • No load-bearing structures involved • Less than 500 sq ft • Home
General Contracting
Jay V.
Nov 4, 2025
Hired on Thumbtack
As first-time homeowners you commit to any significant home improvement project that requires the services of an outside party with underlying hesitancy and wishful thinking. You hope the "expert(s)" you hire truly knows what they are doing and can make your vision a reality.
Well, Kohei and 503 Builders LLC did just that, as they went above and beyond in transforming our unreliable primary bathroom into a part of our house we never want to leave. From the initial on-site consultation, to the necessary labor being exercised in precise, efficient steps, my wife and I never had a doubt that we were in good, guiding hands. Whether it was his consistent, prompt communication, friendly engagement while ideaing with us, or unwavering flexibility, Kohei made my wife and I feel like we were the priority project amongst the many he was managing at the time. We never felt throughout the process working with him and his team that the most preferred outcome was not going to be reached. We already got 503 Builders firmly at the top of mind for the next home improvement project we take on- you should too!
Details: Residential
Deck or Porch Remodel or Addition
Jacob h.
Oct 21, 2025
Hired on Thumbtack
I had a small leak in my bathroom that caused some water damage to the floor trim, and this team handled everything quickly and professionally. They identified the problem right away, repaired the leak, and replaced the damaged trim so it looks brand new. The communication was great, they showed up when they said they would, and the quality of their work was top-notch. It’s such a relief to have the issue fully resolved and the space looking even better than before. I’d absolutely hire them again for any future home projects!
Details: Fix bathroom tiles or flooring • Fix water damage • Full bath • Home
Bathroom Remodel