A rare offering in the heart of the Park Slope Historic District, 7 St. Marks Avenue is a striking 23-foot-wide Gothic Revival townhouse distinguished by its bold brick façade, architectural provenance, and exceptional scale. Currently arranged with an expansive owner’s triplex occupying the upper levels and a private two-bedroom garden residence below, the property offers a highly flexible live-plus-income lifestyle rarely found in Brooklyn brownstone living. Equally compelling, the layout c