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

[1][6] The design involved a symmetrical main frontage with five bays facing onto Castle Street; the ground floor, which was finished in rubble masonry, featured five round headed openings with voussoirs, while the first floor, which was finished in painted roughcast, was fenestrated by five sash windows with rusticated architraves and triple keystones.

[1] The latter room was described by the publisher of topographical dictionaries, Samuel Lewis, as "the most splendid ballroom in North Wales".

[7] A touring cinema company briefly offered silent film performances on a once weekly basis in the ballroom during the early part of the First World War.

[10] The town hall continued to serve as the meeting place of the borough council for much of the 20th century, but ceased to be the local seat of government when the enlarged Ynys Môn-Isle of Anglesey Borough Council was formed at Llangefni in 1974.