Why Altera?

Discover our bi-generational models designed to transform cohabitation, where each generation finds its balance between proximity, autonomy, and comfort.

A vision driven by experience and passion.

Learn about the history of Harmonie Construction and the vision behind Altera multigenerational homes, driven by its co-founders Maxime Thérien and Maurice Dagenais. Together, they share the journey that led them to develop unique expertise in multigenerational housing. Inspired by their own life experiences and driven by the desire to support families in their projects, Maxime and Maurice share their vision of a mission focused on collaboration, innovation, and high-end quality standards.

Discover the essence of multigenerational living.

The Altera series, by Harmonie Construction, brings together three unique models designed to meet the varied needs of modern families. With concepts that combine functionality, elegance, and adaptability, each home reflects a thoughtful approach to bi-generational cohabitation. Whether you are looking for simplicity, flexibility, or total customization, the Altera series offers a solution for every family vision.

Explore the Altera models

A natural collaboration serving multigenerational homes.

Discover how the collaboration between Harmonie Construction and the architectural firm Lemay – Michaud gave birth to the Altera multigenerational series. Guided by shared values, this partnership aims to address the challenges of the housing crisis and demographic realities, such as population aging.

Each model in the Altera series embodies a tailored response to contemporary challenges, creating living spaces that reconnect generations while respecting the subtle need for balance between sharing and autonomy, for perfect alignment with the expectations of modern families.

What they say about us.

My husband and I built our multigenerational home on a magnificent wooded lot in Cantley, QC. From the beginning, my parents were involved in the design and plans for their unit, which allowed us to create a space perfectly adapted to everyone’s needs. This approach to communal living is beneficial for everyone. I have peace of mind knowing they are nearby, while they can enjoy their autonomy without worrying about home maintenance, which my husband and our son take care of. And as a bonus, we sometimes find a delicious pecan pie left at our door!

Miriam