The Castle Square Apartments in Boston's South End has been awarded the highest green building rating by the U.S. Green Building Council after completing the nation's largest Deep Energy Retrofit of an existing affordable housing community.
The U.S. Green Building Council awarded Castle Square LEED for Homes Multifamily Platinum Certification. A Deep Energy Retrofit is defined as a renovation with energy savings greater than 50 percent.
The energy savings, which are projected to reach a 72 percent reduction in energy usage, were accomplished through the addition of a new, five-inch super-insulated building shell, combined with an insulated reflective roof, high efficiency windows and extensive air sealing. Additional savings were achieved using small high-efficiency cooling and heating equipment, LED and CFL lighting, Energy Star appliances and solar hot water.
The renovation project created 655 construction jobs and allowed residents to remain in their apartments with minimal disruption.
Castle Square is a 500-unit low and moderate-income apartment community located on Tremont Street. It was developed in 1965 under HUD's 221 (d)(3) program to meet the needs of low and middle-income families.
In 1992, the property was acquired by the Castle Square Tenants Association and WinnDevelopment and financed by MassHousing under the Emergency Low-Income Housing Preservation Act.