Altair 20 at 15 West 20th St. #PH

This Flatiron residence was distinctly designed for the discerning buyer who seeks privacy from the rush of the city and ample outdoor space. Perched atop a boutique condominium off Fifth Avenue, this luxury penthouse duplex offers the ultimate indoor/outdoor living with nearly 2,000 square feet of private terraces. Currently configured as a 2-bedroom with a library, the floor plan allows for the home to be easily be converted back to a true 3-bedroom with 3.5-bathrooms. The expansive master suite is situated on the second floor, and features a six-fixture bathroom with a large soak-in tub, a dressing room, a separate office, coffered ceilings and a walk-in closet.

Surrounded by large windows that offer three exposures, the sun-flooded home has been carefully appointed with the finest materials including a wood-burning fireplace cased in imported marble, a built-in audio system, radiant heated floors in the bathrooms, a separate laundry room and central air conditioning. The private landscaped terraces, which can be viewed from most rooms within the home, are the perfect oasis for entertaining or for a quiet evening, complete with a hot tub and grill.

The Altair 20 offers an attended lobby, an integrated visual intercom system, a fitness center and additional storage units.