25 Sixth Street

Located near the heart of downtown Chelsea, 25 Sixth Street expands access to affordable, energy-efficient housing in a rapidly growing, transit oriented neighborhood. Completed in 2025 for The Neighborhood Developers, the project transforms a previously developed site into a resilient community asset with direct access to the MBTA Silver Line, Route 1, the Newburyport/Rockport Commuter Rail, and local buses. The development provides 56 one, two, and three bedroom rental apartments from 30-100% AMI, along with six owner-occupied, two-story, condominiums at 80-120% AMI, each with its own entrance along Sixth Street. 

The design strengthens neighborhood connections and the public realm through resilient design tactics, and key site improvements. A pedestrian walkway links Bellingham Square to the Silver Line station, while bicycle and pedestrian plazas at the site’s corners create welcoming outdoor spaces. Storage for 62 bicycles, shaded seating, and a shared roof deck courtyard support active living and community interaction, with 40 off-street parking spaces tucked neatly beneath the courtyard.

The project achieved PHIUS+ 2018 CORE certification, underscoring its commitment to energy efficiency and long-term resilience. Features such as a high-performance thermal envelope, continuous air barrier, and triple-glazed windows significantly reduce energy demand, while centralized energy recovery ventilation and cold-climate VRF heat pumps provide healthy, efficient comfort year-round. Designed to be solar-ready, the building is positioned to integrate photovoltaic panels in the future, further cutting its environmental impact.

By combining deep affordability, thoughtful site design, and nationally recognized energy performance, 25 Sixth Street delivers housing that reflects Chelsea’s community values, supports longtime residents, improves daily connections, and sets a new benchmark for sustainable multifamily development in the city.