The ultimate party pad! Luxury £5.5million Mayfair apartment comes with a communal BALLROOM (dancing shoes not provided)

- The flat at 17 Grosvenor Square has gone on the market with a price tag of £5.5million 

- New owners can enjoy stunning views across Grosvenor Square and short walks to Hyde Park and Bond Street

- It boasts three bedrooms, two bathrooms, a 24-hour porter and maids' rooms available for rent

- But the unique selling point is an enormous ground-floor ballroom measuring 55ft by 22ft with a 20ft-high ceiling

- The grand setting can host 350 people for a cocktail party or 200 of your nearest and dearest for a dinner party

It is billed as the 'ultimate party pad for socialites who love entertaining'.

A sprawling luxury flat in the heart of London's Mayfair, 17 Grosvenor Square comes complete with a £5.5million price tag, stunning views across the historic square a short walk from Hyde Park.

But the second-floor apartment's unique selling point is the enormous ground-floor ballroom, measuring 55ft by 22ft with a 20ft-high ceiling.

It comes complete with a kitchenette and will enable the new owners to indulge 350 of their friends at an opulent cocktail party or treat 200 of their nearest and dearest to a more intimate dinner party.

The three-bedroom property also boasts two bathrooms, a grand reception room and a 24-hour porter service.

Peter Wetherell, managing director of Wetherell said: 'This spacious apartment is perfect for a socialite wanting space for entertaining and staff.

'Its not often that you can buy a Mayfair home with access to a 350 person ballroom and maids' rooms.'

A sprawling luxury flat has gone on the market complete with a £5.5milliion price tag and a communal ballroom capable of entertaining 350 of your nearest and dearest. It has been described by estate agents as the 'ultimate party pad for people who love entertaining'

A drawing shows dancers taking to the floor of the communal ballroom at 17 Grosvenor Square in its heyday

The ballroom measures 55ft by 22ft and has a 20ft-high ceiling. It has a kitchenette and can accommodate a cocktail party for 350 people or a sit-down dinner party for up to 200 of your closest friends and family

The flat boasts three bedrooms. The master bedroom, (pictured) features an en-suite bathroom, views across the picturesque Grosvenor Square and a stunning feature ceiling

The property has gone on the market at £5.5million with a 43-year lease. There is the option to purchase the flat with an extended lease of 120 years, but that will set the new owner back an extra £1.3million

Despite the flat's stunning, spacious living area, its main selling point is the ground-floor ballroom, rebuilt when the block was constructed in 1958

Hiring a ballroom in Mayfair, would typically cost from £7,000 to £10,000 for a day or evening. But use of the ballroom at 17 Grosvenor Square is thrown in free of charge as part of the deal - potentially saving a socialite who loves entertaining the rich and famous thousands of pounds a year

17 Grosvenor Square dates back to the 17th century, but parts were rebuilt after it suffered damage when the area was bombed during the Second World War

The property, which boasts two luxury bathrooms, is valued at more than ten times the average London home and 30 times more than a typical home sold in England and Wales

The stunning flat has gone on the market with estate agent's Wetherell

Peter Wetherell, managing director of Wetherell said: 'This spacious apartment is perfect for a socialite wanting space for entertaining and staff. Its not often that you can buy a Mayfair home with access to a 350 person ballroom and maid¿s rooms'

There is a 24-hour porter while parking and maids rooms can be rented separately

The apartment is situated on the second floor of the stunning block which enjoys views over Grosvenor Square, a short walk from Bond Street and Hyde Park

While the current owners live in the flat as a two-bedroom property, the dining room (pictured) can be transformed into a third