The nave and chancel of the church, or more likely just their N walls, date from the 12th century. The N door of the nave and the plain font are also Romanesque. A window of c1300 has been inserted into the E end of N wall of nave and the rest of the church dates predominantly from c1300 and much from the 19th century.

A church at West Harnham was referred to in a royal charter of 1115, when the king granted it to Salisbury Cathedral.

William Butterfield undertook a major restoration in 1873-4.