Adam Macdonald Plumbing Inc.
“Second review - Had some work done on my shower and once again the service was phenomenal.”
Best Plumbers in Cornwall, ON
11 contractors listed · 5 in Cornwall · 2 open weekends · 10 rated 4.5+ · 1 shows a licence
Data verified October 21, 2026
Aurele St-Jean Plumbing
“I highly recommend Aurele St-Jean Plumbing, their service was amazing, starting with making an appointment with Chelsea.”
Laframboise Mechanical-Electrical Ltd
Little Digger
“They're complete pros at what they do: every minute of every hour was spent working incredibly hard and efficiently.”
Lupien Jean Plumbing
“Jean replaced an outdoor faucet that was leaking and could not be saved.”
Adam Beehler Plumbing Inc
“All done very professionally even if they had to work in the mud.”
Listed for homeowners in and around Cornwall, ON, these 11 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: Cornwall, ON
5 of the 11 contractors we list are based in Cornwall; the other 6 serve Cornwall from towns including Long Sault (8 km), St Andrews West (11 km) and Ingleside (15 km). The contractors on this page are rated from 4.2 to 5.0 across 816 reviews; 3 have 50 or more reviews and 10 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (88%), responsiveness (82%) and quality (80%). 2 are open on weekends. 1 shows a licence on its website. 3 have ten or more years of experience, the longest 25 years. 2 offer emergency call-outs; 2 give free estimates; 4 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 7 of the contractors on this page; 4 publish a contact page and 7 list a public email. 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 Cornwall?
Cornwall is the base for 5 of the 11 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.
The Water Heater Guy
“Adjusted quote down for some labour he did not need to do.”
Cotnam Plumbing Inc.
“Although I had an idea of how I wanted the layout, Mike took the time to explain different possible orientations.”
E W Pryer Plumbing
“Efficient, respectable and reasonably priced for the work completed”
Chollet Mechanical
“Service was quick and efficient, very professional and well priced.”
Capital Mobile Steam Cleaning Ltd
“Very professional, helpful and accommodating, I would recommend them highly”
Why these companies made our list
Is this page useful? Yes
No
Is there anything wrong with this page?
