Meet
Isabelle Perez
& Grant Kefalas
​Behind Evolution Design are Isabelle Perez and Grant Kefalas, an award-winning design duo known for creating interiors that feel refined, layered, and deeply personal. Their work is guided by a simple belief: good design should reflect the people who live there, the way they gather, the way they rest, and the life they are building inside their home.
The Evolution Design Difference
01
A deeply personal process
We listen closely to how you live, creating interiors that feel personal, considered, and unmistakably yours.
02
Architectural understanding
We shape every space through proportion, circulation, natural light, structure, and sightlines.
03
Beauty made livable
We balance elegance, comfort, and function to create interiors as livable as they are beautiful.
04
Custom-designed details
From tailored millwork to refined finishes, every detail brings character, cohesion, and a sense of belonging.
What It Feels To Work With Us
Trusted for interiors that feel personal, considered, and effortless
★★★★★
Lydia M.
​
Right from the beginning, they took the time to understand my vision and preferences. The final outcome exceeded all my expectations.​​​​​​
★★★★★
Marc M.
​
I have had the pleasure of working with Grant and Isabelle at Evolution Design for many years, and we have collaborated on several projects. They consistently deliver interior design services that exceed all expectations! Creativity, ingenuity, and originality define their projects. Each one is unique, as they excel at developing original designs and adapting to their clients' requirements and design vision.
★★★★★
H.U.
​
I have had the pleasure of working with most of the top professional designers both in Canada and the northern U.S. for over 30 years. Isabelle and Grant of Evolution Design represent all the best qualities that one looks for in a design team.​​
Celebrated in Montréal and beyond
Voted Best Interior Design Firm - Best of Montréal 2025
