Park House presented a rare opportunity to redevelop an entire 1.04 acre city block on the edge of Mayfair, with an Oxford Street frontage second only to Selfridges. The sinuous form has a commanding presence appropriate to its setting, embracing a mix of uses including prime retail space at basement, ground and first floor levels addressing the important Oxford Street frontage. Above second floor, anchoring the western end are 7 floors of Grade 'A' Mayfair office space with large clear floor plates of up to 30,000sq.ft. NIA. A dramatic double height drop off, entrance and reception lobby creates an appropriate sense of address on Park Street. At the eastern end there are 39 bespoke private residential apartments, with their own entrance on North Row. Each use successfully coexists with its neighbours without any one dominating the building as a whole. A beneficial kink in the alignment of Oxford Street presents the important north elevation in key views, and awkward steps in the alignment of both North Audley Street and Park Street are reconciled by its curved form, appropriate for the Oxford Street corridor, anchoring its Western end and comfortably mediating with its surrounding context, cradling the northern edge of Mayfair. The expressed structural grid provides punctuation, hierarchy and order to the north and south elevations, anchoring the building and balancing the need for transparency for the retail accommodation at its base. The recessed columns reflect the layered façade panels on either side adding depth and richness to the overall form. The inclined facades increase the space available for pedestrians at ground level significantly improving safety at these key traffic intersections. A gentle curve and recessed balcony that steps in height along the length of the building ensures that upper levels respect the scale of their neighbours. The swept profile of the roof, a fifth elevation, contains private residential terraces and roof plant within the overall envelope. The building takes advantage of ground water cooling to help minimise plant and the energy that it consumes, by providing the primary 'cooling' requirements for the commercial elements of the scheme.