[4] St Mary's is built of limestone with a red tile roof and is in Romanesque Revival style.

Its plan consists of a single cell comprising a three-bay nave, a shallow chancel, and a north-east vestry.

The octagonal pulpit is Jacobean in style and was moved here from Holy Trinity Church, Hull.

A frieze contains biblical scenes, including the Nativity, the Flight into Egypt, David and Goliath, and Salome.

In the corner of the vestry is a round-arched fireplace, its voussoirs crudely carved with human faces and animals.