Draincam
“Gentleman from DrainCam came past 12AM and saved the day because our sump pump blew.”
Best Plumbers in St. Thomas, ON
15 contractors listed · 10 in St. Thomas · 3 open 24/7 · 6 open weekends · 12 rated 4.5+
Data verified October 18, 2026
Elgin County Plumbing
“Kristian did an excellent job, nice and neat and he cleaned up after he was done.”
Ambrose Plumbing & Heating
“Big shout out to Cam and his young helper (sorry I didn't get your name) who came out today to get my floor drain open and water going in the right direction!”
Crosswaters Plumbing
“We needed a plumber to work late evening Friday or over the weekend Mike was great and helped us out.”
Total Plumbing Solutions
“Adam is marvelous we have used this company for a few issues and have no problem calling them for work.”
Trade Tech Mechanical Services Inc.
“They did a great job and thoroughly cleaned up the job site!”
Listed for homeowners in and around St. Thomas, ON, these 15 companies cover plumbing work. Hours, licence claims and free estimate offers come from each company's own website. Ask about provincial workers compensation coverage too, since the work happens inside your home.
Area overview: St. Thomas, ON
10 of the 15 contractors we list are based in St. Thomas; the other 5 serve St. Thomas from London (24 km). The contractors on this page are rated from 4.2 to 5.0 across 3,963 reviews; 8 have 50 or more reviews and 12 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (91%), quality (80%) and responsiveness (77%). The topics that come up most in reviews of the contractors on this page are "price" and "efficient". 3 are open around the clock; 6 are open on Saturdays and 4 on Sundays. 3 show a licence on their websites. 4 have ten or more years of experience, the longest 24 years. 4 offer emergency call-outs; 1 offers financing or payment plans; 3 give free estimates; 3 are family- or locally-owned and 3 list coupons or special offers. We have a website on file for 14 of the contractors on this page; 11 publish a contact page; 7 list a public email and 2 take bookings online. We count these figures across the contractors on this page; distances are straight-line, and hours and prices change, so confirm the details with the contractor before you book.
Which plumbers listed for St. Thomas take calls at night?
Cover at any hour is claimed by 3 of the 15 plumbing listings here. Before paying a night rate, shut the main off and see whether the trouble stops. If it does, book for normal hours and get the same repair for less. Confirm the after-hours rate on the phone.
National Plumbing Solutions
“It was really easy to get a quote and book the work to be done.”
Millcreek Plumbing and Mechanical Ltd.
“Your guys came in to do my mother in laws furnace, she was so happy with the service ,the politeness and the respect Spencer and his Boys gave her.”
Sean O'connor Plumbing Inc
“HIGHLY recommended them for ALL your plumbing needs!”
DCM Plumbing Service
“Thank you for great service experience.”
Donaldson Heating and Air Conditioning
“He was quick, polite, and when we realized there was a bigger issue at hand he help find a workaround so that I wouldn't be without AC while recovering from surgery during a heatwave.”
Plumbhouse Plumbing
“Had Mitch on an emergency call, he responded quickly and was very knowledgeable.”
Roy Inch & Sons Home Services by Enercare
“Robert & Tim switched out our water heaters and we are so pleased with their service.”
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Triton Home Service
“Excellent service, they were able to quickly replace our failing sump pump, which is now good to go!”
Mike Pope Plumbing & Heating
“He was able to answer all of my questions and went above and beyond to show me what to look for as a new homeowner.”
Why these companies made our list
What customers say about contractors in St. Thomas
- “Mike is extremely professional and completes quality work in a timely manner.” — customer of Crosswaters Plumbing
- “The team of experienced and professional staff were hardworking, on time and great to work with.” — customer of Trade Tech Mechanical Services Inc.
- “Hands down the best and most knowledgeable plumber I have ever met.” — customer of National Plumbing Solutions
- “They were courteous, timely and most important did a quality repair for a fair price.” — customer of Trade Tech Mechanical Services Inc.
- “They have been nothing but professional. The charges are reasonable and fair.” — customer of Crosswaters Plumbing
Excerpts from public reviews of the contractors listed on this page.
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