Costello's Plumbing
Plumber · San Leandro, CA
Our verdict
4.9★ with 97 of 100 analyzed reviews at 5-star and zero 1-stars; named techs (Gary, Vic, Miguel) cited for fast arrival, fair quotes and not upselling.
Scores are our editorial reading of published customer reviews — not a verification, license check, or guarantee.
Ranked #9 of 15 plumbers we've reviewed in Newark, CA · compare all →
Our opinion, based on the 100 reviews we analyzed from Google, Yelp and BBB · Analysis updated Jun 2026 · How we decide ↗
What reviewers praise
Fast arrival cited repeatedly (themeCounts.fast_response=24) — within an hour of messaging, plumber Miguel showed up for a no-heat/no-hot-water emergency
1 cited review
“Within an hour of messaging them through the app, Miguel showed up! I was blown away by the responsiveness and punctuality. Miguel was professional, detailed and very informative.”
Cited in 2 of the 100 reviews we analyzed — 1 cited review not excerpted here.
Fair, honest pricing — fixed a broken pipe joint free of charge and beat a competitor quote by ~40% (themeCounts.fair_pricing=4)
1 cited review
“Gary was fast, polite, easy to communicate with and get in touch with, on top of being less expensive then competitors in the area. He did the same work I was quoted by another plumber for at least 40% less.”
Cited in 2 of the 100 reviews we analyzed — 1 cited review not excerpted here.
Same-day water-heater and water-line work — leak diagnosed and a new heater installed in under 3 hours
1 cited review
“In less than 3 hrs a new heater was brought and installed. Vic did a great job on the installation and clean up. He explained the ways and reasons for servicing the new heater.”
Cited in 2 of the 100 reviews we analyzed — 1 cited review not excerpted here.
What reviewers report — the concerns
Other directories bury these. We think you should read them before you call. Every concern below comes from the reviews it cites.
One repipe required redone work and left a mess, and the contractor noted hot-water lines weren't insulated
Cited in 1 of the 100 reviews we analyzed.
Keep it in proportion: these concerns are cited in 1 of the 100 reviews we analyzed. Most reviewers report positive experiences — see the full rating picture below.
The evidence — in reviewers' own words
Critical
“The response time was excellent. I was quoted a ball park price over the phone for about $400 and when he arrived it was closer to $800 but after some discussion with the technician he did give a 10% discount. He did a good job with replacing the seal to the toilet and resetting but he did not do a thorough job with cleaning out the drain. did not see a camera to view the main drain, so I am sure he just used a …”
Positive
“Gary and his crew were great! They helped us identify a few issues we had and resolved it in a very timely manner. We started off with clogged toilets 2 days before Christmas - they came out and helped us snake it, pulling out a bunch of roots. They didn't have their camera so we scheduled another appointment for them to come back out after Christmas. They found another clog, but their 100ft snake was not long …”
“Less than 24 hrs ago I discovered a leak in my water heater. I checked "Angies List" for recommended local plumbers. Costello's plumbing came up. I was contacted within 10 minutes. We set an appt for this morning between 9 and 10. Vic and his helper arrived about 9:15. I was given a detailed quote with a fair and expected price. In less than 3 hrs a new heater was brought and installed. Vic did a great job …”
Quotes are reproduced verbatim from public reviews on the platforms shown; we select which to feature, and selection reflects our editorial judgment. Report a quote that doesn't match its source ↗
The rating picture
Newest review in our sample: Dec 2024.
Across platforms
Should you hire Costello's Plumbing?
Best for
- Emergency and same-day calls
- Budget-conscious homeowners
Hire if
- You need a plumber who actually shows up when scheduled
- You need fast same-day or after-hours response
Think twice if
- You need warranty-grade work on a complex or high-stakes install
- You need detailed walkthroughs and written estimates before work starts
Advice derived from the review analysis above — how we decide.
Own Costello's Plumbing?
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