It is likely that a wooden church and then a Saxon stone one stood on the same site.[2] The current church was built in the 12th century and in the 14th century the south aisle was added. The naveclerestory and timber-framed porch were added in either the late 15th or early 16th century.[3] The monks of the Ruxox Cell acted as priest for the church until the Dissolution of the Monasteries when the abbot of Dunstable Priory surrendered to the king.[2]
Rebuilding in 1835 included the dismantling and reassembly of the Norman doorway in the north wall of the nave.[2] During the second half of the 19th century further restoration was undertaken including a new roof on the chancel.[2]
The ironstone building has ashlar dressings and clay tile roofs.[1] It consists of the chancel, nave with north and south aisles, south porch, and vestry on the north side.[1] The three-stage west tower is supported by buttresses and has an embattled parapet.[3][1] The tower has a ring of seven bells, five of which date from the seventeenth
century.[5]
The font is Norman and has a circular fluted bowl.[5] The pulpit is part of what was originally a three-decker.[5]
The memorials in the church include one to the men of Flitwick who died in World War I and World War II.[5]
