Plumbing 1 Builders
Company Overview
With more than 25 years in the industry, Plumbing 1 Builders Inc., is a reliable, independent contractor providing outstanding plumbing and general contracting services to homes and businesses throughout the Bay Area, CA. We are grateful for your support!
Located in San Mateo, Plumbing 1 Builders is a family-owned operation.
Leo discovered his passion for plumbing through encouragement from his brothers and family. He started his journey at a plumbing business, where he realized he had a talent for the trade. After honing his expertise for 15 years, he took the leap to establish Plumbing 1 Builders. It’s a profession he genuinely loves!
Business Services
- Bathroom remodeling
- Bathtub installation
- Bathtub repair
- Building additions
- Deck construction
- Drain installation
- Drain repair
- Faucet installation
- Faucet repair
- Garbage disposal installation
- Garbage disposal repair
- Gas line installation
- Gas line repair
- Hot water recirculation pump installation
- Hot water recirculation pump repair
- Patio, porch, or terrace construction or installation
- Landscaping building construction
- Laundry room remodeling
- Guest house or ADU construction
- Detached garage construction
- Single-family home construction
- New structure construction
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Remodeling
- New room addition
- Bathroom addition
- Bedroom addition
- Common area addition
- Garage addition
- Kitchen addition
- Laundry room addition
- Sewer installation
- Sewer repair
- Shower installation
- Shower repair
- Sink installation
- Sink repair
- Stairway addition
- New story addition
- Structural repair
- Sump pump installation
- Sump pump repair
- Toilet installation
- Toilet repair
- Water heater installation
- Water heater repair
- Water pipe installation
- Water pipe repair
Business Location & Hours
Mon: | 8:00 AM - 5:00 PM |
Tue: | 8:00 AM - 5:00 PM |
Wed: | 8:00 AM - 5:00 PM |
Thu: | 8:00 AM - 5:00 PM |
Fri: | 8:00 AM - 5:00 PM |
Sat: | 8:00 AM - 4:00 PM |
Sun: | 8:00 AM - 4:00 PM |
Recommended Customer Reviews

On a Sunday night water started flowing into our garage from our downstairs shower. Our property management company contacted Leo's Plumbing Service who sent Tony out to assess our issue. He was very thorough, took his time unclogging the blockage and re-checked everything before leaving. He also explained what caused the issue and what next steps would be if this initial fix didn't resolve it completely. I really appreciated him taking his time and not trying to perform work that didn't need to be done while also informing us of the full issue.

Leo was scheduled by my father's landlord to take a diagnose and fix the plumbing issue.
The first appointment he was late over an hour and did not provide any updates.
He did not make it to the second appointment because I told him we had to reschedule. We scheduled it for 10AM and I sent him a message at 11AM after he did not arrive and provided no updates.
I would not recommend this plumber if you value your time.

Excellent, prompt, professional service reasonably priced. I would call them again. Our drains are now running smoothly. Clog removed. Very pleased with how quickly they were able to respond.

I messaged him twice and he reads it but doesn't respond if busy or not. It's not good to keep people guessing.

I called Leo's Plumbing Service today for an emergency sink evaluatioppointment since I noticed there was something wrong with my sink. The hot water wouldn't come out. Leo told me that he could arrive in 30 minutes, the same day! When he got here he found out pretty quickly what was wrong with my sink (barely anything) and all was done in less than 10 minutes.
BEWARE: There is an imposter out there, trying to pose as Leo online. He uses the same company name in hopes to swindle his customers or anyone who may need him.
Let it be known that this is the one and ONLY true Leo's Plumbing Service! Outstanding and Fantastic service! Five stars all the way!!

I've done business with Leo for about five years. He did a total re-piping in my home. He upgraded my toilets and sinks in my bathrooms and kitchen. I have total confidence in anything he does. Any service relies on HONESTY and great workmanship. I totally recommend Leo and Tony for any plumbing job you might need! We had kitchen problems today and fixed everything. We totally trust him!!

Tony came out and saved the day!! Our tub was backing up and both toilets were not flushing. He arrived and snaked the drain. Everything was working within the hour.

We had a plumbing emergency on a Sunday night where a faucet would not shut off and the valve underneath the sink would not shut off, leaving the water running continuously. We called a number of plumbers but no one could come out. Leo's Plumbing Service came out on very short notice and fixed it for a very reasonable price. Thank you!

Leo's plumbing came out to hook up a gas line for a new stove. They were the perfect balance of efficient, thorough, and attentive to safety. Plus friendly and thorough. easy to work with and good communications.

I have used Leo's Plumbing twice. Once to replace a shower cartridge and once to unclog the kitchen sink drain. Both times Antoni from Leo's arrived quickly, completed the job in a timely fashion and was courteous and honest. In the past we had another company do an emergency clog removal - they charged us $1200. Leo's found a clean out that the other company overlooked, removed the clog and ran the auger to the street for under $200. The first company told us we needed to look into replacing all of our drain pipes and our sewer pipe. Antoni from Leo's walked us through what actually would need to happen and on what time line (the pipes under the house are fine for now and the sewer pipe is something to keep an eye on but not an immediate concern). He also gave us maintenance tips for keeping the system clean. Leo's Plumbing is trustworthy, honest, fast and affordable. Hire them!