Best Plumbers in Oshawa, ON
15 contractors listed · 11 in Oshawa · 5 open 24/7 · 8 open weekends · 14 rated 4.5+
Data verified October 18, 2026
Vaillancourt Plumbing & Drains
Throne Plumbing & Gas Ltd
Central Drain Service Inc.
Multi-Trade Building Services
CDN Plumbing
Listed for homeowners in and around Oshawa, 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: Oshawa, ON
11 of the 15 contractors we list are based in Oshawa; the other 4 serve Oshawa from Whitby (8 km). The contractors on this page are rated from 4.0 to 5.0 across 3,989 reviews; 6 have 50 or more reviews and 14 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (90%), responsiveness (84%) and quality (79%). 5 are open around the clock; 8 are open on Saturdays and 7 on Sundays. 2 show a licence on their websites. Domain records put 5 websites of the contractors on this page at ten or more years old; the oldest dates from 2000. 5 offer emergency call-outs; 1 offers financing or payment plans; 5 give free estimates; 4 are family- or locally-owned and 1 lists coupons or special offers. We have a website on file for 14 of the contractors on this page; 12 publish a contact page and 10 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 Oshawa?
Oshawa is the base for 11 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.


