Isaac Katan’s gotten his hands on some notable South Slope/Greenwood Heights development sites, including what’s now the Vue on 16th Street and a gargantuan building under construction on 4th Avenue between 12th and 13th streets (formerly known as “The Olive Garden Building”). A developer cannot live on development alone, however. Katan recently sold off some properties he purchased in 2004 on 6th Avenue between 16th and Prospect for $3,525,000. Katan paid $3,100,000 for the large former parking lot and air rights from two adjacent buildings a few years ago, so he didn’t clear a huge profit on the deal. Katan never filed new building plans with the DOB for the parcel, and neither has its new owner, a hard-to-unmask LLC. It’ll be interesting to see the shape of things to come here. GMAP P*Shark DOB