St Mary's church, Undy, was built in the Gothic Decorated style, both gable and long-wall entry type. Present status [2002] : unknown.
P.C.Tomlins, RCAHMW, 18.12.2002
The church consists of a nave with a south porch, and a chancel with vestry. The present structure results from a reconstruction of 1878, prior to which a tower, possibly 12-13th century, stood between the nave and chancel.
A 12th century font on two steps is rectangular with base mouldings and rounded stem with engaged piers. The bell, reported as 14th century was rehung in 1920 with the inscription: 'Virgini Marie Laudes'.