521 park avenue

Cool Listings, Interiors, Upper East Side

521 park avenue, cool listings, upper east side

Besides being an architectural gem, designed by William Alciphron Boring and completed in 1911, 521 Park Avenue is the rare classic pre-war Upper East Side building that’s also a condominium (it was converted in 1987). This sprawling duplex is the result of a high-floor two-unit combo. The resulting 3,000+ square-foot corner apartment has as much space and impressive pre-war detail as you’d expect from an address like this one.

Take a look

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