Cumnor includes some houses by Clough Williams-Ellis, the architect most noted for his designs for Portmeirion. His Cumnor houses are some of his earliest commissions, including his first commission, Larkbeare (1903–04, completed 1907) on Cumnor Hill, designed whilst he was still a student at the Architectural Association School of Architecture. The other examples are Cutts End House (1911, Appleton Road), Hurstcote (1922, Appleton Road), and Larkbeare Cottage (1910, Cumnor Hill; originally a gardener's cottage associated with Larkbeare). He also designed Cumnor Rise Hospital at a similar time to Larkbeare (designed 1903–04, completed 1907) but this was demolished in the 1990s.