The church consists of a chancel 19 ft. 6 in. by 16 ft. 3 in., nave 36 ft. by 18 ft., with north aisle 5 ft. 9 in. wide and south aisle 6 ft. wide, and west tower 12 ft. 8 in. by 13 ft. 4 in., all internal measurements. The plan, owing to successive rebuildings and additions, is one of extreme irregularity, the chancel, nave, and tower being all set at different angles, and only the tower being rectangular on plan.
The earliest part of the church now existing is the north arcade of the nave, belonging to the latter part of the 13th century, and the north aisle probably retains its 13th century width. Before this time there doubtless existed an aisleless nave and chancel, the former of approximately the same dimensions as at present, but no details of an earlier date than the north arcade have survived.
The chancel seems to have been rebuilt in the early part of the 14th century, being enlarged in both dimensions, and the irregular angle at which it is set is doubtless accounted for by the usual mediaeval process of building the east wall outside the lines of the older chancel which it was to supersede, a method very productive of errors in setting out.
Later in the 14th century a south aisle was added, its arcade not being parallel to the existing arcade, and the final irregularity was attained by the addition of a western tower early in the 15th century, which appears to have been set out after the same fashion as the chancel—the west wall of the nave and aisles being rebuilt to square with the new tower, without reference to the direction of the nave arcades.
Later in the 15th century the south aisle was lengthened eastward, and a south porch was added; the latter was destroyed about 1823, and its outer archway now serves as a north doorway to the nave. By the beginning of the 19th century the church had fallen into a very bad state. In the repairs then undertaken between 1823 and 1830, the east wall of the chancel was taken down and the chancel shortened and re-roofed, and at the same time the nave received a new roof, and the south aisle was taken down and rebuilt with the old materials.
In the nave are three slabs with brasses, all to members of the Cockayne family, the westernmost dated 1527, and showing the figure of William 'Cokyn' with his two wives and ten children. The next, which is of the 15th century, shows a knight and his lady with three sons and two daughters. This is probably the gravestone of John Cockayne, 1492, but the figure of the man is of earlier date, c. 1430. To the east of it is the brass of Edward Cockayne and his wife, Elizabeth, 1525, with eleven sons and four daughters. On this are the arms of Cockayne impaling a cheveron between three fetterlocks. There was formerly in the church the monument of Sir John Cockayne, formerly Lord Chief Baron of the Exchequer, who died in 1427, but it has been entirely removed.