Grand Slam Plumbing
Plumber · League City, TX · Open 24 hours per Google listing
Our verdict
Perfect 5.0 across 507 reviews; weekend emergency water heater calls dispatched quickly with full cleanup; 3-toilet swap in 3 hours; office called back immediately and texted info even before a job was booked.
Scores are our editorial reading of published customer reviews — not a verification, license check, or guarantee.
Ranked #4 of 15 plumbers we've reviewed in League City, TX · compare all →
Our opinion, based on the 5 reviews we analyzed from Google, Yelp and BBB · Analysis updated Jun 2026 · How we decide ↗
Lists 24-hour service on its Google profile — and reviewers describe after-hours calls.
Only 5 reviews analyzed — treat this assessment as a first impression, not a track record.
What reviewers praise
Weekend emergency water heater replacement — Justin arrived quickly, explained every step, left no trace of work
1 cited review
“We had an issue with our water heater last weekend. I am so glad we called Grand Slam Plumbing. They were wonderful to work with and were able to come out quickly. Justin did such a great job.”
3 toilets replaced in ~3 hours; all bathrooms spotless on exit — scheduler Brittany praised for smooth coordination
Cited in 1 of the 5 reviews we analyzed.
Office staff called back immediately and texted water heater information before any job was booked — cited as going above and beyond
1 cited review
“Called Grand Slam with some questions I had concerning my water heater. Brittany was extremely helpful. Going above and beyond to get me the information I needed. She called me back immediately, even went as for as to txt me the information.”
What reviewers report — the concerns
We looked for patterns of complaints in the 5reviews we analyzed and didn't find any. That's rare — but it's a reading of published reviews, not a guarantee.
The evidence — in reviewers' own words
Positive
“The customer service was outstanding all the way around. The service was perfection. They even broke down every step of the process and cleaned the work area. They really got me out of a bind at my shop in Webster. Highly recommend using this company. Great People”
“We had an issue with our water heater last weekend. I am so glad we called Grand Slam Plumbing. They were wonderful to work with and were able to come out quickly. Justin did such a great job. He explained everything he was doing and why. He is professional, kind, friendly and fast! And when he left, we had a new water heater, but no other evidence he had been there. He was neat and made sure everything was …”
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
Small sample — we've analyzed only 5 of 507 reviews so far. Treat this as a first read.
Newest review in our sample: Feb 2026.
Should you hire Grand Slam Plumbing?
Best for
- Emergency and same-day calls
- Complex installs and remodels
- Water heater install/repair
- Toilet repair and installation
Hire if
- You need a plumber who actually shows up when scheduled
- You need clear communication and upfront explanations
Think twice if
- You need rock-bottom prices with zero flexibility on the quote
- You need guaranteed sub-hour response for true emergencies
Advice derived from the review analysis above — how we decide.
Own Grand Slam Plumbing?
You can respond to our analysis, correct business facts, or dispute the accuracy of a quoted review. Responses that check out get published on this page, and factual errors get corrected — see our corrections policy. We don't remove accurate quotes, but we'll re-run your assessment as your reviews change.
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Nearby: League City · Baytown · Liverpool