A New York City family of five outgrew their Chelsea loft and instead of moving decided to purchase the identical apartment above theirs and merge the two. The owners brought in Design Development NYC to oversee the construction of the eco-friendly renovation and they incorporated a number of health-conscious systems and sustainable materials and with the help of architecture studio wUNDERground and Damon Liss Design handling the interiors, the family got the healthy urban home they desired.