The Lac Constantineau Residence is an eco-friendly luxury home in the Laurentians, combining modern design, comfort, and exceptional energy performance. Built on a spacious, level lot along the shores of Lake Constantineau, it rests on a heated concrete slab, without a basement. The property includes a double garage and a woodworking workshop located in a detached secondary building.All living spaces are on the main floor: three bedrooms with ensuite bathrooms, a powder room, an open-concept kitchen with living and dining areas, a laundry room, and a home office. Indoor comfort is ensured by a central heat pump system combined with geothermal heating and an in-floor radiant system using a water–glycol solution. Solar panels further enhance the home’s energy efficiency, contributing to a durable, self-sufficient, and resilient residence, even in the event of a power outage.