The church is constructed of flint and ashlar stone work and has plain tiled roofs.

[1] The north aisle is late 14th century and contains three three-lighted traceried windows, the easternmost one with a trefoiled head.

The attached porch is constructed of flint with a moulded stone coping, inner and outer doorways, and trefoil-headed windows to the sides.

[1] Internally, the nave is separated from the aisles on each side with 14th-century arcades of three bays of pointed arches with octagonal columns; those to the north being later.

The pews were installed by George Gilbert Scott, Jr.[1] The vestry contains the Culpeper needlework, a 17th-century embroidery on velvet associated with the Culpeper family, thought previously to have been an altar cloth, but now believed to be a funeral pall.

[2][3] The church contains numerous monuments and memorials to the Culpeper family, owners of Leeds Castle and Hollingbourne Manor.

The memorials for the third and fourth barons and for the two members of the Duppa family are by John Michael Rysbrack.