Initially an independent chapel in the Trinitarian tradition it became Unitarian during the ministry of John Palmer between 1764 and 1780.

In the early 19th century a number of Gothic features were introduced to the interior.

[4] The chapel lies behind other buildings and is approached by a narrow passageway from King Edward Street.

It is built from local red sandstone and has a pair of external staircases leading to the east and west galleries.

[3] In the east gallery is a two-manual organ dated 1846, made by John Bellamy.