Crickhowell Memorial Hospital was formerly known as Greenhill House. An appeal fund in 1918 was started for the privately owned house to become a hospital and it was opened in 1920. It was a Regency-style house consisting of a two-storey, hipped roofed main range with parallel wings behind and a glass-roofed front porch with iron tracery supports. It was demolished in 1970.

RCAHMW, 2009.