This is the official residence of British Queen and she is the owner of this property. The Nationwide Building Society has valued this property for $1.5 billion in 2012. This spacious official residence of UK Queen Elizabeth II, who has been ruling over the country since 6 February 1952 and it has 775 rooms, in which 19 state rooms, 188 staff rooms, 52 bed rooms, 92 offices and 78 bathrooms.