503 Builders LLC

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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 64 times

Serves Troutdale, OR

Background checked

License verified

6 employees

6 years in business

Business hours

This pro hasn't listed their business hours.

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This pro accepts payments via Cash, Check, Credit card, PayPal, and Venmo.

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Top Pro status

Top Pros are among the highest-rated, most popular professionals on Thumbtack.

2025

Services offered

Work needed

Property type

Residential

Commercial

Material

Wood

Chain link

Vinyl

Aluminum

Projects and media

Reviews

Customers rated this pro highly for work quality, responsiveness, and professionalism.

Excellent 4.9

55 reviews

5

96%

4

2%

3

0%

2

0%

1

2%

Read reviews that mention:

Josh S.

Sep 23, 2025

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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

Joe G.

Apr 24, 2026

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Hired on Thumbtack

Kohei and his team did a fantastic job on a challenging project. We had water damage in a bathroom that required replacing the vanity, sheetrock and redoing the shower, tile and all. Kohei worked with us to select replacement material and the installation of everything was perfect. We now have a beautiful new bathroom. The challenge was how to make the plumbing work with the new equipment. Several times I was sure it couldn't be done but the team at 503 Builders worked it out to perfection.

Details: Sketches or a basic idea • Bathroom • Repair existing structure • No load-bearing structures involved • Less than 500 sq ft • Home

General Contracting

Leslie F.

May 14, 2026

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Hired on Thumbtack

Details: Yes, the structure has already been built • Other • Already have plans - just need installation • Yes, an existing wall needs to be removed • Yes, I need plumbing or electrical lines installed • Yes, I need drywall applied • Home

Framing Carpentry

Angela m.

Aug 18, 2025

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Hired on Thumbtack

Kohei and his teams of contractors did a fantastic job on building the patio I’ve always dreamed about. Starting with a retaining wall and then the lanai with skylights and build in recessed lighting. I am very happy with the results and look forward to working with them on my next project.

Details: Complete renovation like replacing soil or hardscape services • Trim trees or shrubs • Patio • Back yard • I'm flexible • Home

Outdoor Landscaping and Design

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

Credentials

License

License type: Contractor – Residential General

License state: OR

License verified on 10/18/2025

Background Check

Kohei Takazawa