Regent’s park is set to be home to a £200 million ‘mega-palace’ owned by the Qatari royal family.

Sheikha Mozah bint Nasser al Missned is planning to convert numbers 1, 2 and 3 Cornwall Terrace, Regent’s Park into a palatial family home and once completed the mansion is expected to become London’s most expensive private residence.

The wife of the former Emir of Qatar bought the Grade I listed terraced houses for more than £120 million last year with plans to create a 30,000 square foot, thirteen-bedroom mansion.

A planning application submitted to Westminster City Council reveals plans for a luxurious family home featuring a heated swimming pool, beauty salon and a smoking room .

The documents include plans for a lower ground floor with staff wing as well as a landscaped garden which can be transformed into an outdoor ballroom.

The plans also make room for two internal lifts taking family members between floors, an entertainment centre and a library.

Royal children will also be able to play on their own dedicated floor at the top of the house.

Lavish guest quarters as well as a sixteen-seater dining room will ensure friends and relatives are hosted in style.

Every aspect of the residence is reportedly being planned in meticulous detail, including a specification for the ideal temperatures for different areas of the house.

It is thought the mansion will serve as the London base for the Sheikha’s children and guests, including the Gulf state’s current Emir Sheikh Tamim bin Hamad Al Thani.

The Al Thani family, which has ruled Qatar since the middle of the nineteenth century owns the long leasehold interest in the properties.

The regency properties were built in the 1820’s by architect Decimus Burton, a student of architect John Nash who designed Buckingham Palace and the Royal Pavilion in Brighton.

One of the houses previously served as the official residence of the New Zealand High Commission in 1955 and later became a hippie squat which was disbanded when the property underwent major refurbishment and development in 2008.

The plans submitted to the council by representatives of the royal family envisage major restructuring of internal living areas and a large garage to make way for a fleet of limousines,

The Qatari royals already own a vast property portfolio in the capital including the iconic Shard building and Harrods in Knightsbridge.