Photo credit: Jake DiPietro, Courtesy of Compass

This charming fifth-floor pre-war co-op just two blocks from Union Square, asking $849,000, has plenty of room to expand beyond its current two bedrooms. Situated around a central kitchen, the apartment even comes with instructions (in the form of alternate floor plans, shown in the gallery below). On a quiet landmarked townhouse block in the heart of Gramercy, the Beaux-Arts co-op building at 210 East 17th Street is a well-maintained walk-up.

Have a closer look