The church has a single nave, with a square weather-boarded bell-cote at the W end. There are two Norman windows on the S side, and a blocked arcade with pointed arches in the N wall. A timber truss serves to divide the nave from the 13thc. chancel. There is an organ chamber and vestry on the N side.
A church is mentioned in Domesday Survey (1086). In 1105 Robert de Haye gave Barnham to the Abbey of Lessay in Normandy and it later passed to Boxgrove Priory. The church was restored in 1865.
|diam. of interior of basin||0.54 m|
|h. (incl. plinth)||1.00 m|
|h. (not incl. plinth)||0.80 m|
|l. of each side||0.69 m|