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 16th March 2021 (RN 20/04933/FULL) for the Demolition of existing mansard roof and roof level plant and construction of two storey vertical roof addition with extensions at fourth, fifth, sixth and seventh floor levels for additional office (Class B1) floorspace. Use of the lower ground and basement level 1 for flexible/alternative office (Class B1)/retail (Class A1)/leisure uses (Class D2); basement level 2 for car parking, cycle parking, ancillary office uses and mechanical plant. Alterations to the existing building including new windows and entrance, new terraces to eighth and tenth floor levels and new plant enclosure at roof level and associated works namely to amend the wording of Condition 3 to allow the demolition phase to be split into phases.

Amendments to planning permission dated 4th January 2021 (RN: 20/06655/FULL) for the Installation of double glazed windows on the Berkeley Square, Bruton Street and Bruton Place elevations and new windows on the rear facade at levels 6, 7 and 8, extension to the existing core staircase and lift to roof level to facilitate the provision of a new roof terrace, installation of replacement plant at roof level, installation of external lighting, alterations to shopfront, office entrance and signage including replacement of doors, installation of new weatherproof cladding to the rear fire escape stair, repairs and cleaning to the external elevations and provision of cycle and changing facilities at basement level (site includes 22 Berkeley Square). Namely, to amend rear elevation railing to the left of the rear elevation has been raised to accommodate the roof terrace landscaping arrangements. Existing metal framed windows to be replaced with new double glazed units. New metal window and louvre introduced at ground floor level into an existing opening. Berkeley Square elevation Windows in the pavilion at roof level have been reconfigured to align with internal alterations. Shopfront mullions have been rationalised and the left door has been detailed. The window sill line were missing in a previous survey and they have been reintroduced in this elevation as existing. Roof level alterations New fixed planters introduced at roof terrace level. New bench proposed in the terrace.

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.

Amendments to planning permission dated 22 March 2019 (RN: 18/10845) for: Erection of a new mansard roof extension to create a new 3 bedroom family unit at 4th floor (existing roof) level, including 11 dormer windows, four conservation roof lights, a rear terrace and new air conditioning plant on roof. (Part of a land use swap with 56 Queen Anne Street, Block D Ossington Buildings an d 78 Marylebone Lane) Namely, to amend the description of the proposal to: Erection of a new mansard roof extension to create a new 3 bedroom family unit at 4th floor (existing roof) level including external and internal alterations, a rear terrace and new air conditioning plant on roof (Part of land use swap with 56 Queen Anne Street, Block D Ossington Buildings and 78 Marylebone High Street).

Amendments to planning permission dated 1 September 2014 (RN: 14/02566/FULL) for: Variation of Condition 1 of planning permission dated 04.09.13 (RN: 12/12041) for external alterations and extensions including rebuilding of existing 7th and 8th floor levels, installation of photo-voltaic cells, green roof & plant at roof level, alterations to street facades and rebuilding of rear facades (with new balconies on Smith Court and Piccadilly Theatre frontages, and roof terraces at eight floor level on all frontages), provision of 38 dwellings at 4th-8th floors, with new residential entrance to Sherwood Street, use of second and third floor as offices (Class B1), reconfiguration of existing uses at basement, ground and first floor levels at 12/13 Sherwood Street and 63-75 Brewer Street to provide 2 No. retail (Class A1) units and altered health club (Class D2) layout with new health club entrance on Brewer Street - to allow minor amendments to the approved scheme including: changes to the steel window design on the street facing facades; alterations to the aluminium window design on the rear facades; installation of ventilation grilles in the windows at 3rd-7th floor levels on the Sherwood Street and Brewer Street elevations; alterations to the flank/party wall on Brewer Street; changes to the roof layout and massing; AND removal of Condition 3(2) (requiring detailed drawings of new windows): NAMELY, to amend energy and sustainability strategies to facilitate the removal of a trigeneration system forming part of the central plant within The Crown Estate's Quadrant development and amend the wording of condition 20 accordingly.