11 E Lenox

Boston's first ground-up Mass Timber building!

11 E Lenox St is a 7-story, 34 unit multifamily project in Roxbury, Boston, MA. As of 2022, it was the first ground-up mass timber Passive House project in the City of Boston. The project combines the multiple benefits of mass timber construction and Passive House design (currently seeking PHIUS+ 2018 Precertification) to create an incredibly energy efficient and low embodied carbon building.

The building utilizes several strategies and systems that work to decrease it’s overall carbon impact, holistically designed to lower both its embodied carbon footprint and its operational consumption. Starting from its construction materials, the mass timber is sustainably sourced and is a carbon sink while also being a less carbon intensive material to produce than other common structural materials. Working in tandem with the excellent thermal insulating properties of mass timber, the building is seeking and expecting Passive House PHIUS+2018 Certification - with a passive thermal envelope and novel active building systems designed to be as energy efficient as possible.