Good design is in our nature.


Tandem Architecture Écologique is an architectural practice with expertise in energy efficiency and Passive House Design (Passivhaus). Sustainability is at the heart of the practice, and this goes beyond technical expertise: Tandem strives to create beautiful spaces that enrich daily life and evolve to meet the needs of a changing world.


Are you dreaming up a project driven by sustainability? Let’s talk! Rather than limiting its practice to specific types of buildings, Tandem works on projects with people who share its values and its desire to make the world a better place. No matter how small or large your project may be, if you have a passion for sustainability and good design, get in touch!

What is Passive House Design? (a.k.a. Passivhaus)

Bâtiments maison passive

The Passive House Standard is an international energy efficiency standard that applies to all building types (not just houses!).

Conventional building wasting energy
Conventional Construction
Energy efficient passive house
Passive House Construction
Logo_Maison Passive.png

Upcoming Courses with Evelyne offered by

Please note that all in-person courses have been replaced by webinars due to the COVID-19 pandemic.

Evelyne Bouchard
Evelyne Bouchard

Architect & Certified Passive House Designer

Evelyne is versatile architect with experience working on projects ranging from neighbourhood-scale residential redevelopments to institutional work to renovations that breathe new life into existing buildings. Before founding Tandem, Evelyne worked in architecture firms in London (UK), Montreal and Vancouver.

Evelyne is committed to advancing sustainability in Canada and has served on the board of directors of Passive House Canada since 2017. She teaches courses for Passive House Canada and at the Peter Guo-hua Fu School of Architecture et McGill University.