HouseZero, Harvard University’s Center for Green Buildings and Cities’ new headquarters designed by Snøhetta will be transformed from a pre-1940 house to a super-efficient building with the goal of proving that its retrofits can be retrofitted. (Image courtesy Snøhetta/Plompmozes)

HouseZero, Harvard University’s Center for Green Buildings and Cities’ new headquarters designed by Snøhetta will be transformed from a pre-1940 house to a super-efficient building with the goal of proving that its retrofits can be retrofitted. (Image courtesy Snøhetta/Plompmozes)

HouseZero, Harvard University’s Center for Green Buildings and Cities’ new headquarters designed by Snøhetta will be transformed from a pre-1940 house to a super-efficient building with the goal of proving that its retrofits can be retrofitted. (Image courtesy Snøhetta/Plompmozes)