[3] The new building was designed by Charles Wilson in the Palazzo-style, built in ashlar stone and was completed in 1853.

[4][5][6] The design involved a symmetrical main frontage of five bays facing onto Anderson Street.

The ground floor was rusticated and the central bay featured a round headed doorway with a fanlight, voussoirs and a keystone.

On the first floor, there was a sash window, fronted by a balustrade, and enclosed in an aedicula, formed by pilasters supporting brackets and a triangular pediment.

[15] An extension to the southeast was designed in the modern style, built in yellow stone and completed in 2000.