When Bishop Oldham started the school in 1886, he took in some students as boarders. The boarding facility soon expanded and moved into larger and larger houses, first into Bellevue's Oldham Lane, then to Dunearn House at Barker Road. In 1986, when ACS celebrated its centennial year, the boarding school known as Oldham Hall moved into new premises within the ACS Barker Road campus. It moved back to the rebuilt premises in December 2002 and became ACS Oldham Hall to emphasise its roots as a strong and vibrant member of the ACS family.