It was designed by the architect William Davis in the Decorated Gothic style.

[1] The East window contains the subject of "Christ in Glory" and was designed by Ballantine and Gardiner of Edinburgh and installed at a cost of £600 to celebrate the Diamond Jubilee of Queen Victoria in 1897.

In the interior Swan designed the panelling, choir stalls, pulpit, lectern, screens and doors dating from 1939 which was carved by Robert Pancheri of The Bromsgrove Guild of Applied Arts.

[5] St Agnes' Church is within the conservative evangelical tradition of the Church of England, and has passed resolutions to show that it rejects the ordination and/or leadership of women.

[6] The church has a three manual pipe organ by William Hill & Sons.