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24 firms listed · 9 in Thornhill · 1 open 24/7 · 6 open weekends · 21 rated 4.5+
Data verified October 16, 2026
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.
Of the 24 firms we list here, 9 are in Thornhill itself and 15 come from towns including Mississauga (6), Toronto (3) and Brampton (2). 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.
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.
