Five years after selling for $19.66 million, a 7-level townhouse in the heart of the ritzy Fifth Avenue shopping district has boomed back onto the market with a slight uptick in price. The 13,000-square foot mansion at 12 East 63rd Street in Lenox Hill is now listed for sale for $77 million.

What, besides potential starry-eyed expectations about the blistering NYC real estate market, could launch such an audacious listing? Well, looks like it was just that, since the 1872 townhouse had been gutted and rebuilt when it was last sold in 2010 by listing broker Brown Harris Stevens to Greenfield Properties.

According to listing agent Craig Dix of Key-Ventures, the interior “has been totally rebuilt to marry the classic grandeur of a stately residence with 21st century technology and amenities. The interior design also represents the first residence in New York by world-renowned designer, Pierre Yves Rochon, whose work includes the George V Hotel in Paris, the Peninsula Hotel in Shanghai and the Four Seasons Hotel on Park Lane in London.’’

The home contains 7 bedrooms, 8 bathrooms and 3 half bathrooms, as well as a master suite, double-height living room and a lower level spa that includes a 20-foot swimming pool with reverse current and cascading waterfall, massage room, and a relaxation lounge with natural light and air from a three-story high glass atrium.

It’s also noted that this property is for a discerning owner, or, as we like to say, someone loaded with cash that might need to be parked in the heart of Manhattan.