Greener Living

From development to operations, WinnCompanies embraces environmentally responsible decisions.  We are proud to be a national leader in green development and the utilization of renewable energy. 

Our innovative approach and commitment to sustainability are recognized throughout the multi-family industry, and our award-winning green projects demonstrate our commitment to excellence--and to the planet.

Green Building Certification

Following certification best practices--e.g. the US Green Building Council's LEED for Homes and Enterprise Green Communities as well as Energy Star ratings--WinnDevelopment is leading by example.  All of WinnCompanies' acquisition rehabs and new developments embrace sustainability principles and integrate the best solutions for each particular development.

LEED For Homes: We are pleased to announce that Castle Square has received LEED Platinum Certification as of October 2012. This achievement is the highest available certification from the US Green Building Council.

LEED, standing for Leadership in Energy and Environmental Design, was founded in 2000 by the U.S. Green Building Council and provides building owners and operators with an internationally recognized green building standard. For more information, please visit

Deep Energy Retrofits

WinnDevelopment, along with the Castle Square Tenants Organization, recently completed the nation's largest "deep energy retrofit" (saving over 50% of the building's energy usage).

Through significant support from many partners, including the US Department of Housing and Urban Development's Green Retrofit Program and the Massachusetts Department of Energy Resources, Castle Square has utilized the most advanced building science to guide the renovation of a 500-unit affordable housing complex in one of Boston's premier neighborhoods.