Costellos plumbing
Company Overview
At Costello's Plumbing, we offer top-notch plumbing services for homeowners and businesses in San Leandro, CA, and nearby regions. Our team boasts over 18 years of hands-on plumbing experience, prioritizing quality in every job. Delivering quality plumbing services is our top priority. We achieve this consistently by utilizing the finest tools, materials, and methods for plumbing installations and repairs. We stand out in the plumbing field. We complete our work promptly and efficiently while maintaining high standards. We are licensed and insured, ensuring your safety and peace of mind.
We take pride in our ability to offer top-tier customer service at Costello's Plumbing. Our workmanship is of high quality, and we offer it at a competitive price. We are here to diagnose and provide effective solutions for your plumbing needs.
We aspire to be your lifelong plumbing partner if you allow us the opportunity. We prioritize customer satisfaction and solving your plumbing problems while ensuring your comfort. We consistently put our clients first and work to present the best options for their needs.
Business Services
- 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
- Plumbing inspection
- Plumbing installation or replacement
- Plumbing repair
- Sewer installation
- Sewer repair
- Sink installation
- Sink 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: | 7:00 AM - 9:00 PM |
Tue: | 7:00 AM - 9:00 PM |
Wed: | 7:00 AM - 9:00 PM |
Thu: | 7:00 AM - 9:00 PM |
Fri: | 7:00 AM - 9:00 PM |
Sat: | 7:00 AM - 4:00 PM |
Sun: | Closed |
Recommended Customer Reviews

On time! Accountable. Professional. Everything I expect from a skilled repairman. I have a old house with old plumbing. Problems galore. Gary was tip top.

Called them today and Gary, owner, came out within a couple of hours. He quickly diagnosed the problem, ran to get a part and fixed the issue. Price was reasonable compared to other plumbers we have used in the past. Friendly, competent and nice. We will definitely use him again.

Gary was great. Thank you for your awesome services. We started changing a faucet and ran into pro lens and he provided a rescue .

I called Gary yesterday and he arrived today exactly on schedule. I had a problem with both my upstairs toilets - one leaked and the other was wobbling. Gary removed both and found that they had not been sealed, they were basically just sitting on the floor with a bit of caulk around the edge. Gary thoroughly cleaned the floors and the under side of the toilets and put in proper seals and replaced the toilets. He did the work very efficiently and left his work area spotless. I would definitely use him again for any plumbing emergency. Forgot to mention he is also a very nice guy.

Lousy job, all they look for money not to do the job, better consider carefully before calling this guys

We had a garbage disposal that was leaking, contacted Costello's, and were able to get an appointment the next day.
Miguel was our service technician, and he was great. Quickly diagnosed that a replacement was needed and explained why, left to pick up the parts, then returned to complete the installation -- all in the same appointment.
Miguel will also talk you through pro's and con's about different choices (what to fix now, what to wait on, etc.) and explain each step of what he's doing.
This is our third repair with Costello's (all for different causes). Highly recommended when you have an emergency leak of any kind!

Very quick response, and the job didn't take overly long. We had them completely repipe our 98-year-old house with copper. Never wanted to have to deal with floods again!
They did a few squirrelly things, which we had to pay to have redone, and they left somewhat of a mess for me to clean up, but basically the job is done and hallelujah for that!
If you are repiping, btw, my General Contractor told me, you are supposed to insulate the hot water lines. They didn't.

It looks like we found our local plumbing superheroes! Quick response, repairs, and future project advice - they're like the Avengers of home maintenance. Exciting to have reliable folks nearby!

Got the handle of my (very old) water main valve broken that was on the off position, so no water going in the house. I used Yelp project and a few plumbers contacted me. Most seem pretty qualified. I ended up using Costellos as they were able to do the fix the same day with reasonable price. The team is very professional and efficient with their work. Word was done very well. Will use them again for my future plumbing needs.

Just had our water heater done by Costello's Plumbing. I was a pleasure dealing with these guys. Miguel came in and scanned the work that needs to done throughly. Explained why it needs to done. At the end of the job, he explained how to work the heater(igniting pilot, flushing etc.). Ask for Miguel. He will not disappoint. So friendly and accommodating too. Good job!