Quadrant Architects
“Despite the intricacies of preserving historical integrity while modernizing the space, Sara's profound understanding of architectural principles and her tireless work ethic ensured the project's success.”
Best Architects in Thornhill, ON
24 firms listed · 9 in Thornhill · 1 open 24/7 · 6 open weekends · 21 rated 4.5+
Data verified October 16, 2026
Eminate Hvac Design
“He also communicated very well with our HVAC tech which was very helpful.”
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Expose Design Group Inc.
“I highly recommend EXPOSE team for any renovation project, they are reliable and provide high-quality work at a fair price.”
Vaisman Design
“He helped us tremendously choosing the right contractors and the right materials to make our place unique and standout.”
Alva Roy Architects
“Working with Alva was a pleasure; his creativity knows no bounds, and his commitment to client satisfaction is unparalleled.”
Thornhill Architect
The 24 firms listed for Thornhill, ON provide architectural services. The building types they take, the services they include and the registrations they claim are taken from their own websites, and the ratings and quotes come from public reviews.
Area overview: Thornhill, ON
9 of the 24 firms we list are based in Thornhill; the other 15 serve Thornhill from towns including Mississauga, Toronto and Brampton. 21 of the firms on this page have a rating, from 4.7 to 5.0 across 1,549 reviews; 8 have 50 or more reviews. When customers rate these firms on specific qualities, they most often praise professionalism (100%), responsiveness (84%) and quality (83%). The topics that come up most in reviews of the firms on this page are "communication" and "knowledge". 1 is open around the clock; 6 are open on Saturdays and 3 on Sundays. 2 show a licence on their websites. Domain records put 8 websites of the firms on this page at ten or more years old; the oldest dates from 1996. 1 offers emergency call-outs; 1 offers financing or payment plans and 7 give free estimates. We have a website on file for 23 of the firms on this page; 21 publish a contact page; 22 list a public email and 1 takes bookings online. We count these figures across the firms on this page; hours and prices change, so confirm the details with the firm before you book.
What can an architect's website tell me?
23 of the 24 firms here give a web address. Look for photographs of finished buildings rather than renderings, and for work of your type and scale. A firm that designs schools and a firm that designs laneway houses are answering different questions, and the portfolio usually says which one you are looking at.
Jonathan Weizel Architect
Noar.ca Inc.
Ramboll Canada Inc.
Render 3D Quick
“His design exceeded our expectations and was returned to us faster than we expected.”
Irvi Design
“We had a very positive experience with Bao and Husband when they assisted us obtaining our basement building permit in Brampton.”
Level Up Group Consulting Inc.
“I would also want to mention which definitely makes Michael stand out from other contractors is even after taking the final payment, Michael never forgot to return my calls or to send someone for the final touches”
Uniq Dimensions Inc.
“It's nice to see our existing home on a drawing with such detail.”
Mechways
“Mechways is undoubtedly trustworthy and efficient, making the entire process worry-free for me.”
Stambuk Homes
“Ozren redesigned our two main floors and an addition and brought amazing ideas to the table, including lofts for our girls' bedrooms.”
Technoarch Inc
“I have been working with Gagan and Harpreet for a few years now and I would highly recommend them if you're looking for a professional consultant team to handle permit drawings for construction.”
GTA Permits
“Amazing service, very responsive and helped me through an extremely anxiety ridden experience … would recommend to anyone who needs help with city permits”
Noble Prime Solutions Ltd.
“I have been working with them from last 5 years, had great experience so far.”
RDA Designs
“Just had great experience with Dilpreet/RDA designs, they are really professional and very responsive.”
Permit Works
“We needed permits to renovate our basement, they helped with recommendations and timeline was fantastic.”
Sensyst the Business Interiors Group
“Sensyst is a pleasure to work with I would highly recommend them to friends”
MSH Engineers Inc l Hvac Design Contractor
“We have a project going on under them and find their services and responsiveness amazing!”
B'pal Architecture Studio Inc
“This is our 2nd project with them and they know how to keep their clients happy.”
FA Engineering
“I totally recommend FA Engineering for your future projects, they will get all what you had on mind .”
Why these companies made our list
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