Complete Plumbing
“We have used this company several times and they have always provided us with an amazing customer service.”
Best Plumbers in St. Catharines, ON
15 contractors listed · 9 in St. Catharines · 4 open 24/7 · 8 open weekends · 13 rated 4.5+
Data verified October 18, 2026
Brian Easton Hvac
“Got a good deal on a quality furnace & air conditioner that was within my budget ,the installers were true professionals who did a top notch job.”
Mr. Furnace Heating and Air Conditioning
“Our AC stopped working and Bryan made sure everything was fixed and working in a timely manner despite it being quite late on a Saturday.”
Canada's Pro Plumbing
“They replaced the drains and pipes under my kitchen sink, and most recently repaired my bath tub faucet.”
Modern Mechanical Plumbing & Heating
“When he arrived, I quickly learned that he is not only VERY knowledgeable about all things plumbing-related, but that he is a VERY hardworking, diligent and honest person and I highly recommend him for all of your plumbing needs.”
MNM Plumbing Niagara Inc
“Mike and his team are not only highly knowledgeable and professional , but wonderful people as well.”
Listed for homeowners in and around St. Catharines, 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. Catharines, ON
9 of the 15 contractors we list are based in St. Catharines; the other 6 serve St. Catharines from Thorold (10 km), Niagara Falls (17 km) and Welland (22 km). The contractors on this page are rated from 3.9 to 5.0 across 2,907 reviews; 6 have 50 or more reviews and 13 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (96%), responsiveness (83%) and quality (78%). The topics that come up most in reviews of the contractors on this page are "price", "estimates" and "efficient". 4 are open around the clock; 8 are open on Saturdays and 7 on Sundays. 5 show a licence on their websites. 5 offer emergency call-outs; 1 offers financing or payment plans; 2 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 13 of the contractors on this page; 11 publish a contact page; 10 list a public email and 1 takes 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.
Why are some of these plumbers based outside St. Catharines?
St. Catharines is the base for 9 of the 15 listings here; the rest come from other towns within 25 km. Plumbers work across a service area, so a neighbouring base is normal. Ask how far they travel and whether the trip charge changes with distance.
ACE Plumbing & Heating Corp
“He is passionate about his work and does not compromise in quality.”
Ed's Pipeworks
“We have had Ed and Brian do work for us in the past and were extremely pleased with their work and their customer service.”
Classical Plumbing
Wellbrook Plumbing Inc.
“Isaac and Mel arrived on time and followed Covid guidelines for masking and even wore plastic covers on their shoes to spare the carpets.”
Go Green Plumbing Ltd
“Jordan was able to walk us through everything that needed to get done.”
Trinity Plumbing Niagara
“Excellent company to call when you need any plumbing work completed.”
Reasonable Rooter
“They were able to come quickly and work on multiple small issues we had going on in our house.”
Daine Spooner Plumbing Inc.
“Timely service, extremely well done job with care ,meticulous and very cordial.”
Ideal Plumbing & Heating
“Joey thoroughly explained what was wrong and provided me with a couple options for the best solution.”
Why these companies made our list
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