Danar Co. GTA
“Porch with concrete pad, backyard, new and old stone, relaid and with a perfect grade.”
Best Home Builders in Thornhill, ON
24 contractors listed · 11 in Thornhill · 3 open 24/7 · 17 open weekends · 21 rated 4.5+
Data verified October 18, 2026
Artycon
“Everything came together perfectly and the end result is gorgeous as you can see from the pictures!”
TJI Renovation
“This crew is dedicated in ensuring they exceed customer expectations, exhibited by regularly checking in throughout the project to ensure we were happy with the progress.”
Emian Construction Group
“They were on time, did an excellent job, cleaned up, and were a pleasure to work with.”
Zonix
“I highly recommend to anyone looking for a reliable and trustworthy real estate business.”
Level Structure Inc.
“Amid was knowledgeable and honest, and willingly answered all my questions and requests.”
Listed for people planning a new house in and around Thornhill, ON, these 24 contractors build on land you own or on lots they control. A card reflects the way that builder describes its own work, its plans and its service area; the ratings beside it come from public reviews.
Area overview: Thornhill, ON
11 of the 24 contractors we list are based in Thornhill; the other 13 serve Thornhill from towns including Toronto, Concord and Richmond Hill. 23 of the contractors on this page have a rating, from 4.0 to 5.0 across 2,038 reviews; 11 have 50 or more reviews and 21 are rated 4.5 or higher. When customers rate these contractors on specific qualities, they most often praise professionalism (95%), quality (88%) and responsiveness (81%). The topics that come up most in reviews of the contractors on this page are "communication", "estimates" and "price". 3 are open around the clock; 17 are open on Saturdays and 10 on Sundays. The services the contractors on this page list most often on their websites are home additions (3), basement renovations (2), custom homes (2), design and build (2) and home renovation (2). 5 show a licence on their websites. Domain records put 6 websites of the contractors on this page at ten or more years old; the oldest dates from 2000. 3 offer emergency call-outs; 3 offer financing or payment plans; 7 give free estimates; 3 are family- or locally-owned and 1 lists 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.
What should I look for on a builder's site?
Websites are listed for 23 of the 24 builders on this page. Look for houses finished years ago rather than renderings, a named list of the models they build, and a clear statement of the areas they cover. A gallery with no locations and no plans is a portfolio you cannot check.
Memarchi Green Homes Inc.
Times Group Markham Presentation Centre
Delmar Homes
NUI Remodeling & Construction Thornhill
“Thank you all for the quality of work you delivered and for completing my remodel in a timely fashion.”
Menna Homes Inc.
JP Lucky Construction and Roofing
“I recently had the pleasure of working with an exceptional roofing company that deserves recognition for their exceptional service, competitive pricing, and outstanding customer care.”
Caulking Company Inc
“Dealing with this guys it's smooth as the caulking.”
HH Renovation & General Contracting Inc
“From the beginning we could tell that Hamid's team is very professional, transparent, and responsive.”
Level Up Group Consulting Inc.
“We had two minor issues after the work was completed and paid for, Micheal replied to me promptly and the two problems were fixed within a few days.”
Astaneh Construction
“They are very responsible, providing a high quality of service I find them professional.”
Del Grande Homes
“I wouldn't consider anybody else but Joel and his team for completely renovating my moms kitchen.”
Acon Renovations
“If you are looking for high quality in your renovation, so this company is what you are looking for.”
Aria Build
“Behzad's attention to detail is second to none, and his team comprises top talents of the numerous trades involved in building and design.”
Aimg
“We had Yuri and his team complete re-do our exterior window paneling and boy were we blown away!”
Iremodel Home Renovation Toronto
“This is hands down the most professional contractor I have ever dealt with.”
Regal Crest Homes
“Second after we received our house the coustmer service are the best quick response for any concern very helpful and they have professional crew”
Medallion Corporation
“She's always been prompt with her responses to all my queries and been very kind to address them all.”
Deco Homes
“I had a very pleasant experience with DECO homes from the beginning of the process till my closing date.”
Why these companies made our list
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