Built 1959-61 to the Neo-Georgian designs of Stephenson, Young & Partners. Brick, with three storeys of freely proportioned sash windows. Modelled on Stockholm Town Hall. Wing with low-pitched copper roof and rectangular lantern. Extended in 1980-1.

Source:

Holland and Holder, 'Advice to Inform Post-war Listing in Wales' (2019), p.55
Jonathan Vining and Malcolm Parry, Wales 1901-2000, p.19