The building that is standing in for 666 Park Avenue is the Upper West Side's Ansonia building at 2109 Broadway between West 73rd and West 74th Street. The gorgeous Beaux-Arts-style structure has made previous appearances on the big screen in Single White Female and Hannah and Her Sisters. But its reality is perhaps more interesting: In the 1970s, it was the home of the Continental Baths bathhouse, where Bette Midler got her start with Barry Manilow as her accompanist. The Continental Baths then became legendary swingers' club Plato's Retreat. Long ago, it was the home of legendary Yankee Babe Ruth who was known to walk down to the barber shop on the first floor wearing nothing but his bathrobe.
When Hurricane Sandy hit New York City in late October 2012, the sets of the show were heavily damaged and had to be reconstructed.
Though the name of the series is 666 Park Avenue, the address of The Drake is 999 Park Avenue. The idea of it being a satanic address comes from both Gavin Doran being the Devil and from what 999 is upside down.
Despite being based on the novel by Gabriella Pierce, the only thing that remains the same from the book to the television series is Jane's first name and the title of the show. Aside from that, the series bears little to no similarities to the book.