A view of 164-166 Main Street, a five story apartment building with a commercial space on the ground floor. A new building will be added to Watertown’s skyline near Watertown Square after the Zoning Board of Appeals approved a five story apartment building on Main Street. The approval of the project at 164-166 Main Street was made Wednesday night. The site used to be occupied by a convenience store (Store 24 then Tedeschi’s and briefly 7-Eleven) and sits across from Town Hall. The building will have four stories with 34 apartments, on top of a garage and commercial or office space.