St Michael and All Angels is primarily a 13thc. church that has undergone a number of restorations. The W tower, though it preserves a fragment of a window on its N side and some masonry from the 11thc., was completely rebuilt in 1782 by Thomas Bell. The three-bay nave has N and S aisles; the N arcade was rebuilt in 1860 by J. H. Hakewill. At the E end of the N aisle, there is a two-bay N chapel built around 1300; a little later another bay was added to the E. In the 14thc. a one bay chapel was constructed at the E end of the S aisle. Originally of the 13thc., the chancel was completely rebuilt in 1835. The W tower roof was rebuilt in 1968. Parts of the N and S nave arcades and a pillar piscina are Romanesque.

Domesday Book records a church and a priest in Bassingham in 1086 on land owned by King William I. This written reference is supported in the archaeological record by two fragments of Anglo-Saxon grave covers discovered buried in the church during restoration work in 1861 (see Stocker) and by the small fragment of a round-headed window and abutting masonry on the W tower, dated by Pevsner to the 11thc.

The piscina was probably originally in the S wall of the chancel where such liturgical objects are commonly located; it may have found its way to its present location in the S wall of the S aisle when the chancel was rebuilt in 1835.