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 60 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

Instagram

Top Pro status

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

2025

Services offered

Softscaping

Work needed

Smaller landscape changes

Larger landscape changes

Complete renovation

Hardscaping

Retaining wall

Artificial turf

Driveway

Boulders or stones

Projects and media

Reviews

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

Excellent 4.9

51 reviews

5

96%

4

2%

3

0%

2

0%

1

2%

Read reviews that mention:

Diane Z.

Jun 20, 2025

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Hired on Thumbtack

Details: I'm just starting • Kitchen • Living room • Bedroom • Bathroom • Dining or family room • Garage • Crawl space or attic • Replace parts of existing structure • Repair existing structure • 500 - 1,000 sq ft • Home

General Contracting

Samuel S.

Apr 15, 2025

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Hired on Thumbtack

Details: Complete renovation like replacing soil or hardscape services • Lay grass or sod • Lay artificial turf • Plant trees or shrubs • Remove trees or shrubs • Apply mulch • Artificial turf • Back yard • Side yard • No, one-time project • Home

Outdoor Landscaping and Design

Terren W.

Feb 19, 2025

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Hired on Thumbtack

We worked with 503 on three medium sized projects over the span of four months and are pleased with the end results. Our primary project was our main bathroom and the bid Kohei gave was more than fair given the amount of custom work we wanted. Kohei was a great thought partner, accommodating to complex design requirements, and responsive when challenges arose. In this price range, half of the day-to-day project management fell on us but we didn’t mind since we prefer to be involved. With gratitude, his crew is easy to work with and welcomed feedback throughout the process to ensure things are exact and that we’re happy. Since completion, we’ve had guests who were blown away by our new bathroom.

Details: Full remodel of bathroom • Update style

Bathroom Remodel

Amanda G.

4 weeks ago

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Hired on Thumbtack

Details: Sketches or a basic idea • Bathroom • Crawl space or attic • Complete renovation • New custom construction • No load-bearing structures involved • Less than 500 sq ft • Home

General Contracting

Richard S.

Dec 4, 2025

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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