Amendments to planning permission dated 19 April 2021 (RN: 20/04541/FULL) for Erection of an extension at the rear of 18-22 Wigmore Street at first to fourth floor levels and alterations to the rear roof form to allow conversion of the attic space to provide additional residential floorspace for the existing flats (Class C3), including the infilling of an internal lightwell adjacent to 16 Wigmore Street and the installation of a new lift. Alterations at basement and ground floor level including the infilling of a rear lightwell at basement and ground floor levels. Installation of plant within an associated enclosure at rear first floor level with a green roof over and screened plant on a flat roof at fourth floor level to the rear of 22 Wigmore Street. Alterations to the front of the building including new windows, shopfronts and metal railings at ground floor level. All in connection with the dual / alternative use of the basement, ground and first floors as either office (B1) / retail (A1) or a sui generis use comprising piano showroom, office space, new recital room, piano practice rooms and workshop space and use of the second to new fifth floors as 8 residential units comprising 3 x 1 bed; 4 x 2 bed and 1 x 3 bed. (SITE INCLUDES 18, 20 AND 22 WIGMORE STREET). NAMELY, consisting of the provision of new door height railing gates to the main entrance, new openable railing gates to the eastern side of the main entrance, and insertion of French doors to the eastern ground floor shopfront.

Amendments to planning permission dated 12th December 2022 (RN:22/03987/FULL) for the conversion of ground floor garage to habitable accommodation and erection of mansard extension for use in connection with the existing first floor flat (Unit 8); and extension to the rear first floor to existing flat, Unit 2 [Site includes rear of 25-27 Catherine Place] namely; to extend the width of the flat roof to the edge of the building.

Amendments to planning permission dated 05 March 2021 (RN: 20/08219/FULL) for 'Infill extensions at rear ground floor level, alterations to rear fenestration and new roof to rear extension, conversion of one former coal cellar in basement to habitable accommodation, internal alterations to rear extension, basement floors and associated works'. Namely, to alter design and material of rear patio doors.

Amendments to planning permission dated 07th April 2021 (RN:21/00366/FULL) for Removal of condition 12 of planning permission dated 01 May 2020 (RN: 20/01459) which itself varied condition 1 of planning permission dated 12 February 2013 (RN: 12/12483)for the: internal and external alterations (comprising new windows at roof level, lift overrun green roof skylight, removal of lightwell insertion of new doors at lower ground floor level and creation of roof terrace at rear ground floor level) in connection with the conversion of the existing building from office and residential flats into a single family dwelling to vary the approved drawing numbers to allow the introduction of an additional roof light to the north east of the roof, a replacement walk on roof light to the west of the roof and an extension to the lift overrun box, set into the existing area of flat roof and plant access. Namely, the lift over run box is to be in toughened clear glass.

Amendments to planning permission dated 23 November 2020 (RN: 20/05405/FULL) for the: Erection of single storey rear infill extension, and installation of two rooflights to rear roofslope in connection with the loft conversion. NAMELY, to allow the replacement of the existing timber sash windows with double glazed timber windows with glazing bars to match the existing, and replace the roof tiles to match the existing.

Amendments to planning permission dated 5th March 2021 (RN 20/08219/FULL) for the Infill extensions at rear ground floor level, alterations to rear fenestration and new roof to rear extension and conversion of one former coal cellar in basement to habitable accommodation. NAMELY, amendment to allow dropping floor level in coal cellars to allow usage as bathroom and storage as proposed, new doorway to allow access into closed-off second cellar.

Amendments to planning permission dated 21 July 2020 (RN: 20/02540/FULL) for the: Construction of extensions at rear lower ground floor level and conversion of vaults into habitable accommodation; installation of railings to the boundary wall, replacement of steps from lower ground to pavement level, in connection with enlargement of lower ground floor flat namely, to allow revised roof and stair/railing design, omission of lower ground floor infill rear extension, and fenestration alterations.

Amendments to planning permission dated 20 June 2016 (RN: 15/10444) for: Variation of Condition 1 of planning permission dated 8 December 2011 (RN10/01741/FULL) for development of 55-91 Knightsbridge (including retention of Knightsbridge and William Place facades) to provide retail (Class A1) at basement and ground floor levels, office ( Class B1) at part ground, first, and second floor levels and residential flats at part ground, part first,part 2nd and 3rd to 5th floor levels. Off street servicing and new sub basement car park. Removal and replacement of existing tree on William Street. Demolition of 1-2 William Street and its replacement with a redesigned building with internal linkages to 55-91 Knightsbridge. Restoration and repair of external facades and roofs to 3-7 William Street including reinstatement of original roof profile at 4 William Street, conversion of 1st to 3rd floor levels of 3 and 4 William Street for residential purposes ( Class C3). Namely, the substitution of new drawings to allow minor material amendments comprising a revised number and mix of residential units; the provision of a terrace for a residential unit on the western end of the building; erection of a lift shaft to the rear of 4 William Street; alterations to shopfront of Nos. 3 - 4 William Street; extension at 4th floor level to the rear of Knightsbridge; and reconfiguration of the fenestration. Namely, amendment to the external air vent at 4 William Street.