Stelumar Advanced Manufacturing to Build Automated Modular Facility Near Toronto

Stelumar Advanced Manufacturing Inc., a modular and prefab residential company, will launch in the Greater Toronto Area next year, with initial plans of producing up to 3,000 units annually, Daily Commercial News reported (7-8-25).

“We’re taking a big swing here, doing this at a scale never seen before in Canada,” says Peter Hass, general manager of Stelumar.

Stelumar—founded by Peter Gilgan, who established Mattamy Homes in 1978, a giant in the single-family housing industry in Canada—will be a fully automated 450,000-square-foot facility capable of producing a variety of home types.

The first project will be a six-story, 47-unit residence consisting mostly of middle-income large two- and three-bedroom suites.

Describing it as a global leader in automated prefab factories, Hass says the plant will produce volumetric modular systems comprised of flooring, primed walls, and cabinetry. Each of the three modular boxes that make up a suite will connect utilities into the building’s common hallway.

While the cost will be on a par with a conventionally constructed building, Hass says the goal is complete the project in 10 months as opposed to years using conventional construction methods.

Stelumar will also produce prefab walls and floors shipped to a site for attached or detached homes. The aim is to assemble the products in a day or so versus six weeks for traditional construction, Hass explained.