The development of West Wickham between the two World Wars necessitated the formation of two new parishes - St Francis of Assisi and St Mary of Nazareth . The parish of St Mary's began as a conventional district in 1933, made up of parts of three neighbouring parishes.
A dual purpose church hall was built in 1934 to the design of Martin Travers. Twenty years later a church was built on to the church hall, with a vestibule in between with folding doors, enabling all three parts to be merged in one for special occasions, giving a total accommodation of 600. A chapel, dedicated to the Annunciation, and vestries built over the vestibule were dedicated in 1962.
The interior of the church is boat-shaped, with light-coloured bricks. The nave has a single span roof, lancet windows and oak pews and furniture. A memorial window lists the names of fourteen parishioners who died in the Second World War. The chapel has plain white walls, a blue altar frontal and a gold dossal behind the altar. Also in the chapel are two old side panels from the original sanctuary, carved in blue and gold.
A new organ was installed in 1977.