Best Licensed Plumbers
Best Licensed Plumbers in St. George, UT
Real local companies, compared honestly — no invented ratings, no sponsored placement. Here's who's actually serving St. George and Washington County, what each one focuses on, and how to verify any of them yourself before you hire.
How we evaluated these companies: we looked at each company's own published service pages, how long they say they've operated, and which trades and service areas they cover — publicly verifiable facts, not star ratings or review counts. We don't compile or invent review data on this page, and none of these companies paid for placement here.
St. George Plumber Pro is an independent referral service. We connect homeowners in the St. George, UT area with independent, third-party licensed plumbing contractors -- we do not perform plumbing work ourselves. Always ask to see a provider’s Utah plumbing contractor license number and verify it directly with the Utah Division of Professional Licensing before hiring.
Why use a matching service instead of just calling one of these?
You're welcome to call any company below directly — nothing here requires you to go through St. George Plumber Pro. The advantage of getting matched instead is speed and fit: we route your specific situation (emergency drain, water heater, slab leak, or general repair) to whichever independent, licensed plumber actually has capacity for it right now, rather than you calling around to find out who's available. Either way, verify the plumber's license yourself before they start — see our license verification guide.
The companies
Red Rock Plumbing
General plumbing, drain cleaning, water heaters, leak detection, water softeners
A family-owned, St. George-based plumbing company with dedicated service pages for drain cleaning, water heaters, 24-hour emergency calls, leak detection, and water softeners, and its own before-and-after project photos. Publicly the most content-invested independent plumber we found specifically headquartered in St. George.
Thompson Plumbing, Heating, Cooling & Electrical
Plumbing, water heaters, HVAC, and electrical — multi-trade
Operating in Southern Utah since 1996, based in Washington, UT, with a second office in Cedar City. Covers plumbing, water heaters, HVAC, and electrical rather than plumbing alone — worth calling if you'd rather have one company handle a plumbing issue and an unrelated HVAC or electrical question at the same time.
Free Flow Plumbing & Drains
Plumbing, drain cleaning, hydro jetting, sewer repair, gas line repair
A St. George-based plumbing company with dedicated pages for expert plumbing, sewer repair, hydro jetting, gas line repair, and 24-hour emergency service. Its own site describes itself as licensed and insured — as with any provider, verify that yourself using our license lookup guide rather than taking any company's word for it, including this one.
Roto-Rooter — St. George
Drain cleaning, sewer, water heaters, general plumbing — national franchise
A national plumbing and drain-cleaning franchise with a dedicated St. George location page. Franchise backing means broad brand recognition and standardized service offerings; it also means less of the small-business, single-owner relationship some homeowners prefer.
What "best" means on this page
We're not scoring these companies against each other or ranking them 1-through-4 — that would imply a level of comparative data (verified job counts, complaint records, real customer outcomes) that we don't have and won't fabricate. What we can tell you honestly is what each one publicly says it does, how long it says it's been doing it, and how it positions itself — a single-trade specialist versus a multi-trade shop versus a national franchise are genuinely different choices depending on what you need, not better-or-worse versions of the same thing.
What this page doesn't cover
We didn't compile star ratings, review counts, or complaint histories for any company here — that kind of data is easy to game or cherry-pick, and we'd rather leave it out entirely than present something unreliable as if it were solid. If review history matters to you, search each company's name directly on the review platform of your choice and read the actual reviews yourself rather than trusting a compiled score from any source, including ours.
How to compare on your own
Ask every candidate — including anyone we match you with — the same handful of questions:
- What's your Utah plumbing contractor license number, and can I verify it myself?
- Is the diagnostic or trip fee separate from the repair, and does it apply toward the repair if I go ahead?
- For anything beyond a simple fixture repair, will you pull a permit?
- Who actually shows up to do the work — is it the same company whose license I verified?
A note on accuracy: this list reflects what each company publishes about itself as of September 2026. Company details, service areas, and offerings change — if something here is out of date, tell us and we'll correct it.