A concrete ramp rises from ground to first floor; it leads to an external covered walkway which runs along the south facade at first floor level. This route was originally used by stable hands leading tram horses to their stables, which opened off it.
A new two-storey extension encloses the junction of the ramp and the walkway at first floor level. At ground floor a series of glazed fire-escape doors and a large glazed sliding door connect the bar area to a newly landscaped courtyard. The 4 x 3.5m sliding door disappears between the inner and outer skins of the construction.
Clerestory glazing at first floor level gives views south over the courtyard. To avoid overheating and glare the glazing is shaded with projecting hoods and sills clad with lead.
The extension has a steel box-section frame which supports a timber 'breathing' wall insulated with Warmcell recycled insulation. The steel sections also provide support for the cladding - re-used slates from the original Tramway roof hung on new timber battens. The batten space is ventilated with proprietary ventilators. The monopitch roof covering, mill finish secret-fixed aluminium sheet, continues along the roof of the covered walkway and matches the newly covered pitched roofs of the original building.
The nineteenth-century walkway was constructed of cast-iron columns and beams with a channel edge beam and I-section filler joists filled with concrete. It has been strengthened with new beams, and protected by a new timber roof structure covered with aluminium sheet.
The walkway balustrade - matchboarding clad with diagonal bracing - has been extended into the extension.