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

Invision Design Solutions

Invision Design Solutions

5.0 27 reviews
“From the initial meeting, my anxieties in maintaining a budget and having my ideas/concerns being acknowledged were addressed .”
Free consultationServes St. Catharines, Niagara-on-the-Lake +220+ years
646 Vine St
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Gem Home Staging & Designs

Gem Home Staging & Designs

5.0 8 reviews
“I have been impressed by her inventory and her ability to do elevated yet approachable/comfortable interiors that show extremely well in our photography and in person.”
Serves Niagara, Hamilton, HaltonSince 2016
113, 115 Cushman Rd Unit 18
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Quartek Group Inc

Quartek Group Inc

5.0 2 reviews
“Great people, the employees are always very organized”
Since 2000
91 St Paul St
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A Cushy JOB

A Cushy JOB

5.0 2 reviews
Since 2019
73 Ontario St Unit 103B
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Whiteline Architects Inc.

Whiteline Architects Inc.

4.5 2 reviews
“We had other people tell us what we wanted couldn't be done, we were so happy with the plan that Charles and Kevin came up with.”
Since 2019
83 Ontario St
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Images Staged With Flair

Images Staged With Flair

4.6 12 reviews
“They are very creative in making every space look amazing.”
134 Hartzel Rd
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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.

Distinctive Lighting Concepts

Distinctive Lighting Concepts

4.1 7 reviews
“I really like their selection and have purchased a lot of stylish and functional lighting which I took with me when I moved, mainly because I liked these pieces so much.”
Assessment $75Since 1994Locally owned
40 Scott St W #1A
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The House

The House

5.0 1 review
“All done on time and on budget.”
Serves Niagara Region, Grimsby +5Since 2014
142 Cushman Rd #6
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Leanne Mosquite Design

Leanne Mosquite Design

5.0 2 reviews
“Leanne was willing to listen to our ideas as well and incorporate them.”
Serves Niagara RegionSince 2007
8 Hiscott St #2
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Tara Lee Designs Inc

Tara Lee Designs Inc

Since 2002
391 Merritt St
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Peninsula Flooring

Peninsula Flooring

4.9 49 reviews
“This is the perfect place where you can get the best ideas for your floor project.”
Free estimatesSince 1963Serves Niagara Region
Niagara-on-the-Lake, ON · 7 km from Saint Catharines
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Help Me Rhonda's Interiors

Help Me Rhonda's Interiors

4.9 31 reviews
“Rhonda and John helped us to update our kitchen, paint various rooms, renovate our master bath and numerous other smaller projects.”
Since 1993
Niagara-on-the-Lake, ON · 7 km from Saint Catharines
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Stallion Construction Group Inc.

Stallion Construction Group Inc.

5.0 27 reviews
“Sohaib is truly a wonderful man/ professional who puts his best into everything.”
Since 2018
Mississauga, ON · 57 km from Saint Catharines
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HEK Renovations

HEK Renovations

5.0 7 reviews
“I recently witnessed HEK Renovations' outstanding work in our building's lobby and hallways.”
Serves Greater Horseshoe Area, Toronto +4Free consultation
Mississauga, ON · 57 km from Saint Catharines
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Simply White Interiors

Simply White Interiors

5.0 5 reviews
“The team worked so hard to make sure that all the rooms in my house look extraordinary, and I have recieved many compliments regarding the same.”
Serves Canada
Niagara-on-the-Lake, ON · 7 km from Saint Catharines
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HomeInterior Designers and DecoratorsOntarioSt. Catharines, ON

Why these companies made our list

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