The Feldman brothers developers won unanimous approval to convert the historic James E. English Building on State Street into 39 market-rate apartments as city planners applauded a nearly all-residential project that seeks to avoid the empty groundfloor storefront phenomenon. Commissioners granted that approval Wednesday night during the regular monthly meeting of the commission in the groundfloor meeting space at the 200 Orange St. municipal office building. They approved the site plan submitted by Jacob and Josef Feldman’s MOD Equities for 418 State St., the red-brick, four-story commercial-office building that was built circa-1865 and that currently sits vacant at the corner of State Street and Court Street downtown. The site plan calls for the building’s conversion into 39 apartments, a mix of one-bedrooms and two-bedrooms, as well as a ground-floor commercial space of roughly 844 square feet. Commissioners also granted unanimous approval for the developers to receive a special permit allowing them to build out apartments on the building’s first floor. The underlying zone for the district does not allow first-floor residential use as of right. As for the apartments being add...