The flint rubble church has chancel, nave with S chapel and a tower over the S porch. The church is substantially 14thc. with the tower, S chapel and chancel slightly later than the nave, which however appears to have been built on earlier foundations. An earlier church probably existed on this site, but the only 12thc. feature now present is the font.

Prior to the conquest the manor of Clothall was held by Alnod Grud. After 1066 it was held by Osbern of Odo of Bayeaux. Odo lost Clothall and all his English possessions after taking part in the rebellion against William Rufus, and Clothall was subsequently made part of the castle-guard barony at Dover which was held by the Port family of Basing. The advowson of the church was held with the manor.

The font is probably late 12thc. See also the font at Bishop's Stortford (Herts).

VCH notes that the lowermost courses in the foundation of the church are shelly oolite, while the upper courses are clunch, suggesting that this may indicate that the 14thc. church made use of materials from an earlier church, or used the the same foundations.