Stable Roofing Inc
“Stable Roofing did our roof 5 years ago and they are still in excellent shape.”
Best Roofing Contractors in Thornhill, ON
24 companies listed · 4 in Thornhill · 13 open 24/7 · 22 open weekends · 22 rated 4.5+
Data verified October 18, 2026
Jakes Roof Repairs
“Jake was very responsive over text and came by the next day to repair a saggy eavestrough.”
Hrc Group
“Based on the work that was completed and the knowledge base that shaw has, we are already planning to work on another project with him.”
Megapolis Roofing Inc.
“The project has been completed on time, within the agreed budget and we're very happy with the service quality.”
Tip Top Trough
“Excellent company, fantastic communication, fast, high quality work and a pleasure to deal with!”
Unique Roofing Limited
“So professional, skilled , equipped with modern technology , very honest , on time , very clean work .”
Listed for homeowners in and around Thornhill, ON, these 24 companies take roofing work. What each one claims about tear-offs, membranes and workmanship cover is taken from its own website; ratings and quoted lines come 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 Etobicoke, Scarborough and Toronto. The companies on this page are rated from 4.0 to 5.0 across 2,903 reviews; 20 have 50 or more reviews and 22 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (92%), quality (85%) and responsiveness (81%). The topics that come up most in reviews of the companies on this page are "price", "estimates" and "efficient". 13 are open around the clock; 22 are open on Saturdays and 18 on Sundays. The services the companies on this page list most often on their websites are roof repair (6), roof replacement (4), commercial roofing (3), flat roofing (3) and leaf guard (3). 5 show a licence on their websites and 2 list staff certifications (GAF and IICRC). 10 have ten or more years of experience, the longest 25 years. 13 offer emergency call-outs; 5 offer financing or payment plans; 19 give free estimates; 7 are family- or locally-owned and 1 lists 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 roofers listed for Thornhill quote at no charge?
Free estimates are stated by 19 of the 24 companies on this page. A free visit is normal in this trade, though it doubles as a sales call. Ask for photos of the roof and the attic, written findings, and a price that separates the tear-off from anything found under it.
Professional Roofers
“Referred our neighbours to them because our experience was so good 👍🏼”
Alpine Roofing
“Considering the inherent messiness and complexity of such a task, especially on a Victorian home situated on a bustling downtown street, their professionalism was commendable.”
AZ Roofing
“Darwin was great and we highly recommend the service.”
BNS Roofing
“They do a great clean work will gladly be more then happy to use them again on my next house 🏠”
Cadillacs Roofing
“After comparing with 7 other quotes all of my questions and requirements were answered beyond my expectations.”
The Roofers
“The work crew was great and polite and took great care during the roof replacement of my property and the adjacent houses and did a good cleanup after work was complete.”
JP Lucky Construction and Roofing
“Wendy and James explained everything to me, answered all my questions and after talking to them, I knew this was somebody I can trust.”
Toronto Master Roofing
“I called them for roof replacement, they gave me reasonable price and have done an amazing job !”
Renotown Inc.
“Andy our project manager/contractor was professional, knowledgeable and provided exceptional care throughout the time they worked on my home.”
C Plus Roofing
“I am really pleased with C Plus Roofing on how quickly they resolved an issue with my roof.”
Quality Roofing Services LTD
“The work was done on time and at a reasonable price.”
Three Bro Squirrels Roofing Ltd.
“I quoted 4 companies back in March and they were the only ones who said to wait until the weather was good so the shingles would set properly.”
Tiltop Roofers
“They were very professional and prompt about our leaking roof and gave honest knowledgeable advice about the condition of our roof.”
Home Star Roofing LTD
“Very profesional: job was done on time as planned,in one day, clean.”
Universal Roofs Toronto & GTA Roofing Services
“They did an excellent job of replacing the roof, so now my roof doesn't have any leaks!”
Bros. Roofing
“We just had our entire roof done on one of the properties and were very satisfied with the workmanship.”
Canada Standard Roofing
“Jay and Zak team delivered superb evesthroughs cleaning and leaf guard installation service after a shingles installation from another contractor who failed to blow off shingle residues from evesthroughs.”
Citypro Aluminum
“They did everything from replacing the siding to installing eavestroughs, gutters, soffit, and fascia.”
Why these companies made our list
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