 It is built mostly of flint, in common with many Sussex downland churches; some stone rubble and masonry is also visible, and recycled Roman tiles can be seen.It has been described as being "a little like a stone barn", and its isolation is enhanced by its position in the middle of a field reached through a tree-lined hollow.The outside of the north wall of the chancel incorporates a pair of Romanesque-style Norman-era blocked arches, described as "extraordinary" by Nikolaus Pevsner (who dated them to 1160).