A block south of the Yeshiva Machzikei Hadas, at Sixth and 21st, where a demo permit is in place, there's more demolition on the horizon. The warehouse at 715 Sixth, formerly home to Lafayette Glass, which moved out in 2013, has just got its demolition permit, as has the adjoining wooden house at 721. 715 was sold in late 2013 for $2,800,000, and 721 was sold in April '14 for $1,350,000. Both properties were purchased by 715 6th Avenue LLC, There are no development plans on file right now, but one imagines the familiar story. More "market-rate" apartments coming soon.