As well as housing the town's market it has historically been used as a law court, a military barracks, a mechanics' library and a boxing/wrestling venue.

[2] Located on the site of the old market cross and accessed from Stanley Street, the town's main throughfare, it was changed and improved in 1906.

[3] It is a two-storey building measuring 1,732 square metres[4] and is built of local green shaley rubble with buff sandstone dressings and slate roofing.

[7] Opening in September 2019, the building now houses the town's library as well as meeting rooms available to rent by local interest groups and businesses.

[1] In 2020 the project won a Royal Institution of Chartered Surveyors Social Impact Award, with judges from the Institution stating: "The revitalising of Holyhead Market Hall has not only conserved a landmark building in Holyhead, but has also provided a much need[ed] social facility with a diverse range of activities.