Through his funds he founded a landmark, hilltop church of St Barnabas, Ranmore Common, provided for the Denbies Estate's owners and employees.

[6] Collaborative historians' work the Victoria County History states it is "a handsome stone church, with chancel, nave, and aisles in 13th-century style".

[6] Cubitt purchased Bodiam Castle and its 24 acres (9.7 ha) from Fuller's grandson in 1849, possibly local farmer Thomas Levett, descendant of an old Sussex family and owner of Court Lodge Farm a seller in a later smaller sale nearby, for over £5,000 (£660,000 today).[7].

[8] Curzon began a programme of investigation at Bodiam in 1919, and with architect William Weir more greatly restored parts of the castle.

A stained glassed window in the school chapel, dedicated to St Cecilia, was created by Cubitt in remembrance of his wife after she died in 1904.