Fanum House is the headquarters of the Automobile Association in Basingstoke in the English county of Hampshire. It is one of several AA buildings named "Fanum House" around the country. The original headquarters in Leicester Square was also called Fanum House, 'Fanum' being the call sign of the AA. The Skyline Plaza development in the town centre replaces it as the tallest building in Basingstoke since it was extended from 61 metres to 85 metres with the addition of three floors in 2009.