The school owns a number of dedicated boarding houses, which play a significant role in school life being the residence of AGS' 150 or so junior and senior boarders. The present junior hall (Longford Hall) is located by the school's playing fields about a mile away. In 2017 the Haberdashers' enabled the school to purchase and re-furbish Beaumaris Court, a former care home, to become the school's new senior boarding house Beaumaris Hall. This new facility replaced the three senior boys' boarding houses which were situated in large Georgian townhouses facing the High Street.