Grosvenor House

Grosvenor House is an eight-storey office building with a reinforced concrete frame, occupying a corner plot. The main elevations are clad in artificial stone panels with red polished granite at ground floor level, while the rear elevation exposes the concrete frame with brick infill. The flat roof is concealed behind a projecting parapet and a 'flying' concrete and glass cornice.

The building's entrances are split between office floors on Bennett's Hill and former bank and shop premises on New Street. The exterior displays a strongly rhythmic facade, particularly to New Street, with characteristics typical of the 1951 Festival of Britain. The corner features a curved 'prow' with small balconies decorated beneath with coloured mosaic and protected by thin curved steel balustrades to French windows. The New Street elevation includes curved windows, while Bennett's Hill has seven angled bays creating a zig-zag rhythm, ending in another curve. All windows are fitted with pivoted steel frames. The Fire Office Passage elevation has a concave return. A deep projecting sill band repeats the undulating pattern across each storey, surmounted by a heavily moulded cornice with straight capping. The upper storeys feature extra projecting sills to the central windows, while triangular sills form an alternating pattern to the otherwise flat Bennett's Hill elevation.

The office entrance on Bennett's Hill is marked by large folding bronze gates decorated with an abstract pattern of interlocking circles, though the doors behind are a late 20th-century replacement. Ground-floor shop windows on Bennett's Hill are framed in bronze with red polished granite frames and cladding. Those facing New Street sit under a broad canopy and have been extensively remodelled, though new frames and cladding match the surviving original windows.

The shop, former bank and office interiors have been completely remodelled with no original fixtures or fittings remaining. However, the entrance hall and stairwell accessed via the office entrance on Bennett's Hill retain special interest. Though internal walls were re-clad in cream-coloured marble in the late 20th century, the layout survives. An Art Deco style open well stair with red terrazzo floors (now mostly covered in carpet) is lit from above by a rectangular roof light. The stair has closed balustrades curved at the corners, topped with a black tubular handrail supported on slender metal brackets. The ground-floor lobby handrail has been replaced with polished chrome. There are two lifts to each floor; those at basement level retain their original surround while upper-floor lifts are now clad in polished chrome. The lift interiors have been refurbished and are not of special interest.