[3] The new building, which was designed by John Thomas, the county surveyor, in the Neo-classical style opened as Caernarvonshire Shire Hall in 1863.

[1] The design involved a symmetrical main frontage of seven bays facing onto Castle Ditch; the central section of three bays featured a tetrastyle portico with Doric order columns supporting a frieze inscribed "Victoria Reg County Hall AD MDCCCLXIII" ("Queen Victoria County Hall AD 1863") with triglyphs and a pediment.

[1] A figure of blind justice, carved by Robert Evans, was erected at the apex of the pediment.

[1] After the courts moved to new Caernarfon Criminal Justice Centre on Llanberis Road in 2009,[8] the old County Hall was acquired by a developer, Aaron Hill,[9] who converted part of the building into an eight bedroom home, before putting it up for sale in September 2016.

[10] It was acquired by a musician, Moira Hartley, in February 2018;[3] after securing planning consent in October 2018,[11] she carried out an extensive restoration to the building and converted it into a concert hall and restaurant.