Nest Seekers’ Ryan Serhant may have just found his nest egg at the Renwick Modern, but that doesn’t mean he’s slowing down at all. The star broker is now hard at work on the listing for the neighboring Penthouse 1, which is asking $6.35 million. This luxurious loft-like condo stuns with a sprawling 2,700 square feet of never-before-lived-in interior space and an additional 1,380 square feet of outdoor space in the form of a roof deck and four separate terraces. Sound impressive? Let’s take a closer look.