Homes close to the family seats of Downton Abbey's Lord Grantham and Pride and Prejudice's Mr Darcey are selling for bumper premiums.Properties situated near Highclere Castle, Newbury, home to ITV's Downton Abbey, sell for £155,532, or 44%, more than houses in neighbouring areas.Meanwhile, houses within earshot of Chatsworth House in Bakewell, Derbyshire, the real-life inspiration for Mr Darcey's Pemberley estate enjoy a £154,063, or 89%, boost.On average, buying a home near Britain's stately homes can cost £41,000 more than in neighbouring areas, according to Halifax.Halifax said prices around some of Britain's most impressive historic family homes have risen by £746 a month, or £89,506 in total, over the past 10 years. The average cost has risen from £229,697 in 2005 to £319,203 in 2015.The house price analysis revealed that in cash terms, the average price growth in areas with stately homes is more than double the national increase of £39,311 (22%).Homes close to Kenwood House in Hampstead Heath come with the biggest premium of £770,023 (120%). Properties near Ham House in Richmond upon Thames have a £513,918 (116%) top-up, and those near Ightham Mote in Sevenoaks, Kent, have a £231,230 (82%) premium.Looking further afield than the South East, homes close to Cheshire's Tabley House, Tatton Park and Peover Hall and Gardens have an average house price premium of £181,517 (83%).Properties close to Downhill House and Mussenden Temple in Coleraine, Northern Ireland, were the only ones in areas close to stately homes to have fallen over the 10-year period. On prices fell by £12,977, or 10%.However, some 17 locations in close proximity to stately homes trade at a discount compared to neighbouring areas. The biggest discount is for home near Wimpole Hall in Royston, Cambridgeshire, where prices are typically £50,000 (13%) lower than in the county of Hertfordshire as a whole.The cheapest area close to a stately home to live is the immediate vicinity of Auckland Castle in Bishop Auckland, County Durham. Here the average price is £104,391.