The church consists of a chancel with vestry on the N, a nave, N aisle, W tower and S porch. The nave has a late 12th-century, four-bay, N arcade with a mixture of trumpet scallops and a moulded capital.

At the time of Edward the Confessor, Hilmarton, then worth 15s, was held by Eskil. The Domesday Survey records it worth 30s and belonging to Enrulf of Hesdin. There was a mill, 6 acres of meadow, 1 acre of pasture and 6 of woodland. No church is mentioned. The church is first mentioned in 1291, when valued for taxation by Pope Nicholas (VCH, IX, 61).

Like the rest of the church, the 12th-century arcade has been restored heavily in the 1840s and in 1879-81 by G. E. Street. The carvings of the E and W responds may date from the time of the 19th-century restorations.