Most of these mega mansions will be out of the reach of ordinary house hunters but they show what you could get if you have a few million pounds to spare.
From a 14th-century castle to a striking modern silo conversion, these properties are all truly unique and are priced from £4 million to £15 million.
Most boast extensive grounds, beautiful landscaped gardens and glorious views over the surrounding countryside.
As well as charming period features, they have plenty of modern touches, including cinema rooms, gyms, swimming pools and air conditioned wine stores.
Below are the nine most expensive mansions listed for sale on Rightmove, from the lowest to the highest priced.
For more amazing properties, take a look at these houses for sale on Britain’s most expensive streets.
9. Ling Lane, Leeds - £4,000,000
This huge seven-bedroom house, with eight bathrooms, is in one of the most sough-after areas of north Leeds and has an indoor swimming pool and leisure wing, a games room and a cinema room. | Rightmove/Tyron Ash International Real Estate Photo: Rightmove/Tyron Ash International Real Estate