Hotel impresario Ian Schrager makes his first foray into the residential market with 50 Gramercy Park North (50 Gramercy Park N.; 212/ 475-8500;; from $3,000 per square foot). Overlooking Manhattan's only private green space—to which owners are issued a coveted key— the newly built 18-story tower adjoins the Gramercy Park Hotel. When it is completed, in January 2006, residents will have access to a concierge staff, who can arrange for dog-sitting, configure your TiVo, or source a rare Brunello for a dinner party. The 23 condominiums, ranging from 1,800 to 4,500 square feet, designed with Zen- like simplicity by architect John Pawson, have white-oak floors, cherrywood cabinets, and stainless-steel countertops. Northern and southern exposure is provided by floor- to-ceiling windows, along with views over the park's verdant canopy. —peter JON lindberg