[2] The church stands adjacent to the site of the former Gains Castle, some 4 miles (6 km) southeast of Stockbridge.

[4] St. Mary's is constructed in flint rubble with stone dressings and quoins.

It is a small narrow church with a simple plan, consisting of a nave and a chancel, with a south porch.

At the corners of the east end are 16th-century diagonal buttresses, and on the gable is a stone cross.

To the east of the door is a damaged piscina, and to its west is a 16th-century alms box that has been carved from a tree trunk.

[1] A pair of tombchests in the churchyard is designated as a Grade II listed building.