Kristen Wu at Sotheby's International Realty

Flatiron’s residential market moves quickly, and agents who know the difference between Gramercy co-ops and NoMad condos can make all the difference. Kristen Wu at Sotheby’s International Realty has an office on the fourth floor of 149 Fifth Avenue, steps from Madison Square Park. The building itself is a quiet landmark among the neighborhood’s mix of pre-war lofts and sleek new towers, offering a discreet base for buyers and sellers navigating Manhattan’s midtown core.

From studio rentals to full-floor pied-à-terres, they handle transactions that reflect the area’s blend of historic charm and modern convenience. Open houses, off-market listings, and board-package reviews are part of the routine here, where the client roster often includes international buyers drawn to the cachet of a Fifth Avenue address. The firm’s global network can also ease the complexities of cross-border purchases, a detail that sets the service apart in a city where foreign investment remains steady.

When questions arise about closing timelines or neighborhood zoning, a call to +1 212-461-6056 puts you directly in touch with the team. For directions to the office, the map at this link will guide you past the Flatiron Building’s iconic facade and into the elevator up to the fourth floor—where the next deal might already be taking shape.