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Innovation is at the heart of our conceptual approach. It is based on an integrated design process as well as on a R&D process. Above all else, we seek to value the human, environmental, and economic aspects of each of the projects we undertake.

Our firm is a leader in sustainable building design in Quebec. We have more than 20 LEED-certified projects in our portfolio. More recently, we have been investing in a design process aiming for the WELL certification and building life cycle analysis (LCA).

We also specialize in the planning and implementation of flexible and functional work environments. Incorporating the principles of the Activity-Based Workplace (ABW), we offer thoughtful solutions tailored to our clients' needs. This expertise allows us to stand out on a national level. 


Coarchitecture was founded in 1976 as Les Architectes Hudon & Julien. The firm specializes in the development of cultural, administrative and high-tech buildings. We are recognized for our innovation-based approach and for our portfolio, one of the most extensive in the greater Quebec City area.

Coarchitecture is led by five architects (Normand Hudon, César Herrera, Martin Lavergne, Guylaine Lafortune, and Mylène Bureau), one technologist (Louis Caron), and one Master of science in architecture (François Cantin). Our practice focuses on sustainable development, quality design, and creativity.


Coarchitecture contributes to shaping places whose vitality goes beyond shape and form. We cultivate collaboration to facilitate the creation of remarkable and sustainable architecture.


Mylène Bureau and François Cantin 
become associates. 


The firm unveils its new brand image.

Coarchitecture writes the Guide de la transformation du milieu de travail for the Société québécoise des infrastructures (SQI). 


Mylène Bureau and François Cantin 
become associates. 


Marie-Chantal Croft leaves the firm to join the non-profit organization Écobâtiment.

The firm adds schools to its main sectors of activity.  
The firm expands its field of expertise in building science. It is awarded projects in life cycle analysis (LCA) and thermal resistance simulations of building envelopes. 


Martin Lavergne and Guylaine Lafortune become associates.


Coarchitecture relocates to its new offices at 50-1195 Lavigerie Avenue.


The firm adds high-tech buildings to its main sectors of activity.


Les Architectes Hudon & Julien becomes Coarchitecture. This name reflects its commitment to placing collaboration at the forefront of its practice.


The firm receives the firm LEED Gold certification in Quebec City.


Marie-Chantal Croft becomes an associate. 

The firm brings together a team of building science specialists: a mechanical engineer, a LEED certification specialist, and a natural and artificial lighting specialist. 

The firm undertakes its first projects in the cultural sector.


César Herrera becomes an associate. 

The firm makes a commitment to environmental responsibility, aiming to become a leader in building certifications. 

The firm invests in R&D and building science to support its sustainable development ambitions. 


The firm undertakes its first projects with the Revit software. 

Denis Julien retires.


Michel Hudon retires.


Alain Tousignant, Louis Caron, and Normand Hudon become associates alongside the firm’s founders.


The firm becomes a pioneer in computer‑aided design with the AutoCAD software.


The firm establishes a four-and-a-half-day work week.


Michel Hudon and Denis Julien found Les Architectes Hudon & Julien.

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