Perched atop a park-block townhouse, this penthouse duplex makes for modern living with pre-war elegance. Exceptionally outfitted, this special home features the unbeatable charm of two outdoor spaces and two fireplaces, with the convenience of central air, washer/dryer, abundant closets, and ample private storage space in the basement. After three short flights of stairs, this duplex sanctuary is everything that Upper West Side living is about. Quiet and airy, the apartment is flooded with plenty of light from northern and southern exposures. The first floor is perfectly appointed. The large living room boasts a southern exposure that opens up to your own terrace. Down a hall with plenty of closets and a full bathroom, the open kitchen is complete with a fireplace and a picturesque bay window. The first floor also boasts a roomy den suitable as a fifth bedroom.Upstairs is a full bedroom floor with four bedrooms, two fully renovated baths, and a washer and dryer. One flight more, and you have a rooftop oasis to yourself; a sprawling outdoor space perfect for entertaining.Recently named the Best Block on the Upper West Side, 90th Street is lined with some of the tallest trees in NYC that guide you to straight to the revitalized Park entrance. Just seconds from the reservoir, playgrounds, tennis courts and all the outdoor activities you could want. This is a co-op with condo-like rules; pets permitted on a case-by-case basis, sub-letting allowed, and easy and flexible approval process.