The structure, which is the meeting place of Brecon Town Council, is a Grade II listed building.

[1] The design involved a symmetrical main frontage with three bays facing onto the High Street.

[1] The building was refurbished at the expense of the former local member of parliament, Sir Charles Morgan, 1st Baronet, for £500 in 1809 and remodelled at the expense of the High Sheriff of Brecknockshire, Lieutenant-Colonel John Morgan, of Lion Street, Brecon, for £3,000 in 1889: the remodelling involved the infilling of the arcading on the ground floor to create a mayor's parlour and a courtroom on that floor.

[9] The Brecon Jazz Festival, which started in 1984, was held annually in the guildhall until the Theatr Brycheiniog was completed in 1997.

[11] Works of art in the town hall include a portrait by Hans Schadow of the opera singer, Adelina Patti, who lived at Craig-y-Nos Castle,[12] and a portrait by Isaac Cooke of Gwenllian Morgan, the first woman in Wales to hold the office of mayor.