The Hewitt School Townhouse Renovation project involved the renovation and expansion of 42 East 76th Street (the Townhouse), and renovation of selected areas within 44-46 East 76th Street (the Gregory building) in order to connect the two.

The work in the Hewitt School Townhouse is approximately 10,600 gross square feet, and includes the demolition of all interior finishes and services within the Townhouse exterior walls, the demolition and replacement of the south façade and roof, and an expansion into the rear yard of the Townhouse, to provide classrooms, a science lab, a fabrication lab, and faculty office space. Additionally, work includes the repair of the existing brownstone façade to remain and replacement of windows on the brownstone façade. A new south façade and rooftop addition of brick and stone is proposed to replace the south façade and provide additional space for the School.

Work in the Gregory building was approximately 5,000 gross square feet and included a renovation to provide connections to the Townhouse, corridors to existing stairs, and common spaces to lockers and restrooms.