Popular Cities
24 contractors listed · 9 in Thornhill · 16 open 24/7 · 22 open weekends · 22 rated 4.5+
Data verified October 16, 2026
Listed for homeowners in and around Thornhill, ON, these 24 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.
Of the 24 contractors we list here, 9 are in Thornhill itself and 15 come from towns including Toronto (5), Mississauga (3) and North York (3). The contractors on this page are rated from 4.0 to 5.0 across 7,583 reviews; 17 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (93%), quality (84%) and responsiveness (80%). The topics that come up most in reviews of the contractors on this page are "efficient", "price" and "estimates". 16 are open around the clock; 20 are open on Saturdays and 21 on Sundays. The services the contractors on this page list most often on their websites are sump pump (3), emergency plumbing (2), plumbing installation (2) and tree root removal (2). 9 show a licence on their websites. 5 have ten or more years of experience, the longest 30 years. 17 offer emergency call-outs; 1 offers financing or payment plans; 12 give free estimates; 6 are family- or locally-owned and 4 list coupons or special offers. We count these figures across the contractors on this page; hours and prices change, so confirm the details with the contractor before you book.
Cover at any hour is claimed by 16 of the 24 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.
