The church of the Assumption of the Blessed Virgin Mary, known as the church of St. Mary, is 12th-century, with four-bay 13th-century nave arcades and a 14th-century west tower.

The church consists of a chancel measuring internally about 29 ft. 3 in. by 16 ft. 5 in., north organ-chamber, nave 50 ft. 4 in. by 18 ft., north aisle 6 ft. wide, south aisle 15 ft. 7 in. wide, west tower overlapped by the aisles 11 ft. 5 in. square, and a south porch 9 ft. 9 in. by 9 ft.

The reset south doorway and the western jambs of the chancel arch are the only surviving details of a late 12th-century church; the extent of the nave of this building is probably represented by that of the present nave, and it is possible that the existing north and south arcades are pierced in the original walls. About 1250, the south aisle was added and the chancel arch, and probably the chancel itself, were reconstructed. The aisle is much wider than the normal aisle of the period, but the east wall, which contains the jambs of original lancets, is obviously of 13th century date, and suggests that the aisle, as first erected, had a chapel at the eastern end, the width of which was adopted for the whole aisle when it was afterwards rebuilt in the 15th century. The north aisle was first added later in the 13th century, and was extended westwards c. 1300 when the west tower was begun. The south aisle must have been similarly extended, as it opens to the ground stage by an arch like that which opens to the north aisle, but all evidence of this has been obscured by the later rebuilding above referred to. Early in the 15th century the clearstory was added and the nave reroofed, and probably at the same time the stairs at the north-east of the north aisle were constructed with the closed passage spanning the east end of the aisle and leading out upon the now destroyed rood-gallery. Late in the century the west tower was completed, the south aisle was brought to its present form, and the south porch was added. The nave, chancel, and tower were restored in 1887, and in 1897, the south aisle and porch were restored. The walling is of rubble, and the north aisle is cemented externally.