Best Interior Designers and Decorators in St. Catharines, ON
15 firms listed · 10 in St. Catharines · 5 open weekends · 13 rated 4.5+
Data verified October 21, 2026
Gem Home Staging & Designs
Quartek Group Inc
A Cushy JOB
Whiteline Architects Inc.
Images Staged With Flair
The 15 firms listed for St. Catharines, ON take on interior projects. The rooms they specialize in, the credentials they claim and the stages their service covers are all drawn from their own websites, alongside ratings and quotes from public reviews.

Area overview: St. Catharines, ON
10 of the 15 firms we list are based in St. Catharines; the other 5 serve St. Catharines from Niagara-on-the-Lake (7 km) and Mississauga (57 km). 14 of the firms on this page have a rating, from 4.1 to 5.0 across 227 reviews; 1 has 50 or more reviews and 13 are rated 4.5 or higher. When customers rate these firms on specific qualities, they most often praise responsiveness (94%), professionalism (88%) and quality (88%). The topics that come up most in reviews of the firms on this page are "communication" and "price". 5 are open on Saturdays and 1 on Sundays. Domain records put 6 websites of the firms on this page at ten or more years old; the oldest dates from 2000. 2 give free estimates and 1 is family- or locally-owned. We have a website on file for all 15 of the firms on this page; 13 publish a contact page and 8 list a public email. We count these figures across the firms on this page; distances are straight-line, and hours and prices change, so confirm the details with the firm before you book.
Where can I see a firm's finished projects?
Websites appear on all 15 listings here. Look past the styling for evidence of layouts changed and problems solved, and for homes of your vintage. Ask which projects the firm ran from start to finish and which it only furnished, since the photographs rarely say.