[5][6] This Early English church was laid out c.1220 in an original cruciform floorplan with a central tower topped with a lead flèche, a typical example of a Hertfordshire spike.

[3] The exterior is faced with flint and has Totternhoe stone dressings, and the walls are topped with decorative crenellations which were added in the 19th century.

The church is especially noted for its fine 15th-century tie-beam roof, supported by stone corbels with sculpted heads and carved wooden angels with outspread wings.

[1][9] Set into the north wall of the chancel is a decorated recessed tomb topped with a recumbent effigy of a priest wearing vestments for celebrating Mass.

[7] In the nave are oak pews dating from the 15th or 16th century, noted for their carved poppyhead finials with grotesque faces.

[7][9] In 1871/2, the church underwent a restoration by the architect George Edmund Street, who introduced some Victorian Gothic Revival elements and built the north and south porches, as well as a medieval-style baptistery.