East Village penthouse kings Isaac & Stern Architects have been working on a 10-unit apartment building at 532 East 5th Street, once the home of a four-story house. The project got off to a slow start in February, with a little work on the ground level and a rendering that a tipster derided as borrowing from Greenpoint. Now some EV Grieve photos show the building on the way up, albeit slowly. Eventually what's on the spot will be the steel and concrete structure above. Still too Greenpoint, or an improvement on the rest of the rather quiet block?