Citywide Post Hole Digging
“Customer service is quick and extremely helpful, work is always completed ensuring customer satisfaction.”
Best Concrete Contractors in Thornhill, ON
24 companies listed · 4 in Thornhill · 8 open 24/7 · 20 open weekends · 23 rated 4.5+
Data verified October 18, 2026
Toronto Foundation Repair
“They came out with plenty of notice and gave a thorough inspection, answering any questions I had along the way.”
ISA CO. Excavation Demolition Shoring Services
“Really happy with their services & quality work.”
Hotreno Inc.
“I would recommend them to anyone who is looking for a dependable contractor.”
Aquatech Basement Waterproofing Toronto
“We highly recommend them and their final price was fair and reasonable for the thorough job they did!”
Direct Waterproofing
“Our basement has never looked better, and we no longer have to worry about water damage.”
Listed for homeowners in and around Thornhill, ON, these 24 companies do concrete work. What each says about mixes, finishes and scheduling around the cold season comes from its own website; the ratings and comments on this page are from public reviews.
Area overview: Thornhill, ON
4 of the 24 companies we list are based in Thornhill; the other 20 serve Thornhill from towns including Mississauga, Etobicoke and North York. The companies on this page are rated from 4.4 to 5.0 across 4,314 reviews; 21 have 50 or more reviews and 23 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (88%), quality (82%) and responsiveness (73%). The topics that come up most in reviews of the companies on this page are "price", "estimates" and "cleanliness". 8 are open around the clock; 18 are open on Saturdays and 17 on Sundays. The services the companies on this page list most often on their websites are foundation repair (3), basement lowering (2), basement waterproofing (2), sump pump installation (2) and waterproofing (2). 5 show a licence on their websites and 1 lists staff certifications (IICRC). Domain records put 8 websites of the companies on this page at ten or more years old; the oldest dates from 2006. 9 offer emergency call-outs; 20 give free estimates; 1 is family- or locally-owned and 4 list coupons or special offers. We count these figures across the companies on this page; hours and prices change, so confirm the details with the company before you book.
Do any of these crews list weekend hours?
Weekend hours show on 20 of the 24 listings here. Concrete gets scheduled around the forecast and the plant, not around the calendar, so weekend hours generally mean somebody picks up the phone rather than a crew being on site.
Water Pro:
“Water Pro Master did a wonderful job and I have already had them back to quote more work.”
Royal Work
“Very professional work done at my mom's house, they were very nice and understanding with her.”
JP Lucky Construction and Roofing
“We dealt directly with Wendy, and she was so professional, friendly and had amazing communication with us during the entire process.”
Aquamen Waterproofing & Underpinning
“They were very quick to respond, took care of everything, before we could even start to panic, everything was done.”
VIP Paving & Interlocking Contractors Toronto
“VIP Paving did a fantastic job repaving our driveway and redoing our front walkway and steps with beautiful interlocking stones.”
Dryshield
“I would recommend Tony to anyone looking for an honest and reliable waterproofing professional.”
Stone Contractors Group Inc.
“Highly skilled and experienced professionals, who went above and beyond to assist me at every step.”
Rooter-Man
“Stefan and Niel did an excellent job using the very best in equipment & technology.”
Prime Waterproofing
“Nick came on the same day I inquired about it, assessed the situation, provided an estimate, and the pump was replaced the next day”
TTA Service Underpinning
“Great company, hard working and everything was done on time, efficiently and clean.”
Draincom Basement Waterproofing
“Other companies told us we would have to take down our porch before completing the work but Vlad realized that this was not actually necessary, saving us a huge amount of time and money.”
Epoxyguys
“Carlos and team did a great job with the epoxy flooring in my garage.”
MW Contracting Corp
“Mw contracting is very reliable company and I will recommend it for your swimming pool demolition.”
GTA Masonry Inc
“I would highly recommend GTA masonry to perform any cement repair work needed to be done outside your house.”
MT Drains & Plumbing LTD
“Dixon showed up in few hours and installed the pipe in no time.”
Magcor Demolition & Underpinning
“The team worked quickly to tear down the makeshift brick, masonry and steel structures, leaving everything else intact.”
Procrete Contracting
“We are very happy with the end product and are so grateful to have found very honest, hardworking and trustworthy company.”
NTL Contracting and Waterproofing Inc.
“Whenever I tell my coworkers about the bad contractors, I also tell them about the good ones, and Josh and his team certainly fall into the category.”
Why these companies made our list
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