It's 10,000 square feet and includes a squash court, cinema, casino and bowling alley. The one - arguably most important - thing it doesn't have though is the necessary planning permission.
As a result the luxury backyard 'man cave' built eight years ago by millionaire Graham Wildin has since been the focus of a bitter dispute between the 69-year-old and his neighbours. During that time he has also been ordered by the courts to the tear down the structure - orders which he has so far ignored.
Earlier this year he was even reported to have used his collection of classic cars to effectively block access to the street and cause 'parking chaos' in an attempt to stave off demolition.
