This building is noted on the 1910 plan as the Brigade Offices for the 11th Infantry Brigade, a brigade being an operational amalgamation of between three and six battalions. The 1910 plan only shows the outline of the building but internal divisions are included on another plan held by the English Heritage Archive dating to 1946. This plan shows the building to comprise three rectangular structures aligned N to S with a square structure on the east side. The easternmost of the rectangular components extends further to the north than in the modern structure. The square structure on the east side (later replaced by a garage) has a centrally located doorway in the south wall, flanked by windows, a fireplace and stairs leading to a cellar. Modernisation of the barracks was carried out 1958-61 and these changes are recorded on an undated plan. The west side of the former Brigade Offices are labelled on this plan as the Church Rooms, and the building has been extended to the south and converted to a Guard House. The square structure to the east is labelled the Trailer Pump and appears to have been completely rebuilt.<1><2>
It is a single-storey building comprising three staggered ranges aligned north-south with an east-west aligned range at the south side and a square garage adjoining the northeast corner. The three staggered ranges comprise the original structure, the Brigade Offices dating to c.1897, and are constructed from red brick laid in Flemish bond. They have gabled slate roofs with timbered and rendered apices, some of which have wooden louvers. Modernisation of the building in 1958-61 removed the chimney stacks and recovered the roofs. However, unusually for the barrack buildings which were re-roofed in asbestos tiles at this point, the roof covering is of slate, which may be a re-use of the original covering.