The small rectangular building was always a single-cell chapel with no internal division.
 It has two storeys and walls of flint and sandstone with red-brick quoins and window dressings.
 The oldest structural features are the two lancet windows in the north wall, which have y-tracery in a style typical of the early 14th century.
 The pointed-arched lancet in the east wall has two lights and is either 14th- or 15th-century.
 Two pairs of single-light lancets with red-brick surrounds were added in the south wall during the 1878 renovations, which also added a timber roof with tie-beams.
 The two simple windows in the west wall may have been inserted then as well.
 A pair of dormers on the south side date from the 1972 conversion into a house.
 A survey in 1860 noted that the original arched entrance on the north side was blocked, and described the "three solid stone buttresses" on that side.
 At that time, markings in the adjacent field (then part of Bilsham Farm) still identified the limits of the former churchyard, which was said to be large.
The small rectangular building was always a single-cell chapel with no internal division.  It has two storeys and walls of flint and sandstone with red-brick quoins and window dressings.  The oldest structural features are the two lancet windows in the north wall, which have y-tracery in a style typical of the early 14th century.  The pointed-arched lancet in the east wall has two lights and is either 14th- or 15th-century.  Two pairs of single-light lancets with red-brick surrounds were added in the south wall during the 1878 renovations, which also added a timber roof with tie-beams.  The two simple windows in the west wall may have been inserted then as well.  A pair of dormers on the south side date from the 1972 conversion into a house.  A survey in 1860 noted that the original arched entrance on the north side was blocked, and described the "three solid stone buttresses" on that side.  At that time, markings in the adjacent field (then part of Bilsham Farm) still identified the limits of the former churchyard, which was said to be large.
Bilsham Chapel