A modern building constructed in 1969 and designed by the County Architects department under the direction of County Architect JA McRobbie as the county library for Breconshire and was officially opened by The Prince of Wales on 23rd July 1969. It replaced a row of medieval buildings fronting directly onto Ship Street. The building has a reinforced concrete frame with waffle floor and roof slabs. The main elevations use a light sand coloured silica brick with a dark brick for the ground floors. It has glazed panels and slate roofs.