Inside Chelsea Clinton's $10m 'luxury fortress' that stretches over an entire New York City block

Chelsea Clinton's new $10million pad is New York's longest apartment - stretching an entire block from 26th Street to 27th Street off Madison Avenue.

Described as 'a luxury fortress' with one full-time doorman to the horizontal building's four units, it takes almost 30 seconds to walk the 250-foot hallway, according to New York Daily News.

The former First Daughter, 33, bought the four-bedroom, 5,000-square-foot apartment with her husband Marc Mezvinsky, 35, after putting their nearby $4million pad on the market earlier this year.

The apartment is located in The Whitman building next to Madison Square Park, one of the most desirable corners of Manhattan's Flatiron District.

 The building, which is being marketed by Douglas Elliman Real Estate, has one apartment on each floor and boasts various security features, including a key operated lift and one doorman for just four units.

The nearly 90-year-old building has just three $10million homes and one $22.5million duplex penthouse - so far two buyers are in contract, including Ms Clinton.

Apparently other big names are looking at the remaining units, which are billed as among the most secure in Manhattan.

Melanie Lazenby and Dina Lewis, who share the residential building's listing, said the hallway is 'the wow factor' but exclaimed: 'There's a full-time doorman for only four apartments. I don’t know any other building with that kind of personal service.'

Ms Clinton and Mr Mezvinsky's apartment has six and a half bathrooms, a home office and den, plus a 252-square-foot planting terrace and a private storage unit.

The couple will also enjoy two dishwashers, two washer/dryers, his and her maze-like closet spaces and commodes, as well as natural light flooding the female dressing room - with double-sided vanity mirrors. 

'Wives eyes light up when they see the closets,' said Ms Lazenby, the daughter of James Bond actor George Lazenby.

'They smile and say they'll need more clothes to live here. Their husbands just shake their heads.

'The long apartment, located at 21 East 26th St enables 'one spouse to be fast asleep while the other has a huge dinner party. All on one floor,' she added.

One person who toured the building, which was built in 1924 by luxury textile manufacturer Clarence B. Whitman & Sons, joked that residents of The Whitman will have a longer walk to their kitchen than many New Yorkers have to the corner store.

The couple's current apartment on Fifth Avenue is far from shabby - boasting three bedrooms, two bathrooms as well as a gym and doorman.

Located in the Grand Madison - a building that has been dubbed 'the most elegant and historical building downtown,' the 1,922-square-foot boasts 'unforgettable views' over downtown Manhattan.

According to a Douglas Ellisman listing, the couple's $4million 'starter pad' has a powder room, an open chef's kitchen with beautiful bluestone countertops, oak floors, Italian marble bathrooms, huge windows and scores of other luxury finishes.

Assuming a four per cent interest rate and 20per cent down payment, Ms Clinton and Mr Mezvinsky's already-hefty mortgage payments total around $18,460 a month.

But they're set to skyrocket.

According to StreetEasy.com, if the pair put down a $2.1 million - or 20per cent - deposit on the new $10million home, their monthly mortgage bill will be in the region of $52,000 and closer to $60,000 if the couple handed over a ten per cent down payment instead. 

DailyMail