The Advisory Service for Squatters (A.S.S.) is a non-profit group based in London and run by volunteers. It aims to provide practical advice and legal support for squatters. It was founded in 1975, having grown out of the Family Squatters Advisory Service. After being based for many years in St. Paul's Road in Islington, A.S.S. moved its offices to Whitechapel High Street, in the same building as Freedom Press.