[1] The first municipal building in the town was a medieval courthouse adjoining Clun Castle which dated back to the early 16th century.

[4][5] The design involved a symmetrical main frontage with three bays facing onto The Square; there were three round headed openings with architraves and keystones on the ground floor.

Originally, the central bay was surmounted by a gable containing a carved stone panel bearing the Powis coat of arms and the date of completion, MDCCLXXX (1780).

[3] A major programme of restoration works, carried out with funding from English Heritage, which included the creation of a new main entrance on the western side of the building, was completed in the 1990s.

[9] It contains a collection of some 6,000 ancient tools many of which were found on a local hillside, Caer Caradoc, and date back to the mesolithic period.