Erection of single storey mansard roof extension to create additional residential (Class C3) floorspace and rear terrace at second floor level with associated works to the building including new and replacement windows. [Revised Description of Development to include terrace]

Confirmation that the planning permission dated 23.09.2020 under reference 20/04785/FULL for Use of building as a single dwellinghouse (Class C3); excavation of a basement extension under house and part of rear garden; installation of replacement windows and doors; alterations to front forecourt including new garage entrance; alteration and extension to side extensions; alterations to rear lower ground floor terrace; and erection of lift overrun at roof level, has been lawfully commenced and it is lawful to continue with that development.

Variation of Condition 1 of planning permission dated 5th November 2021 (RN: 20/07701/FULL) for, 'Demolition of the existing fourth floor roof structures and erection of two storey roof extension to create new fourth and fifth floor level (including plant and roof terraces); all to enlarge office building (Class E). Alterations to front (western facade), installation of new windows throughout and associated alterations'; Namely, to make the following amendments to the approved development - internalisation of stair and associated adjustments to roof layout. (Application under Section 73 of the Act).

Confirmation that planning permission dated 8th September 2014 (RN: 14/03923/FULL) has commenced on 31 August 2017 before the expiry of the three year time period and it is lawful to continue with this development for the 'excavation to create basement extension and lower pavement vaults; removal of existing extensions and replace with extensions at rear lower ground to third floor level including roof terrace at rear first floor level; erection of fourth floor extension in mansard style to rear and open up blind windows to front; installation of plant within mansard structure; new landscaping to garden and replace boundary wall with 16 Wilton Crescent'.

Variation of Condition 1 of planning permission dated 6 October 2020 (RN: 20/03213/FULL) for, 'Use of ground floor as residential accommodation in connection with the existing flat at lower ground floor. Erection of single storey rear extension at ground floor and creation of rear ground floor terrace area. Alterations to rear and front elevations including the installation of an external metal staircase to lower ground floor, replacement of existing windows with new double glazed painted sash windows and installation of new rooflights at the rear'; NAMELY, to vary the proposed layouts to reflect further development of the design. (Application under Section 73 of the Act).

Variation of Condition 1 of planning permission dated 3rd November 2020 (RN: 20/05446/FULL) for, 'Removal of existing roof top plant rooms. Erection of single storey pitched roof extension above existing third floor. External alterations including reinstatement of chimney and gable to parapet lines. Alterations to existing fenestration to create "blind windows" to north elevation. Associated internal alterations. Installation of plant equipment'; NAMELY, to make the following amendments to the approved development - changes to the height of roof pediment details, including addition of 1 additional cast iron rainwater pipe to match the existing adjacent fittings and alterations to consented rear fresh air-vents on rear elevation. (Application under Section 73 of the Act).

Excavation of a basement under existing house; enlarged lower ground floor under part of front and rear gardens with enlarged front lightwell and formation of rear lightwell, extension of ground floor living space, erection of concrete garden wall to rear garden and heightening level of rear garden, erection of roof extension between existing front and rear ridges at main roof level and associated door/ fenestration changes. (This scheme proposes the development as approved under applications 19/05827/FULL which varied 18/08748/FULL, but with amendments)

Variation of Condition 1 of planning permission dated 09 September 2020 (RN: 20/02991/FULL) for, 'Demolition of outbuilding in rear garden, erection of single storey rear extension at ground floor, replacement and relocation of windows to street elevation, and amalgamation of basement studio flat and flat on ground to second floors to form a single dwellinghouse (Class C3)'; Namely, to make the following changes to the approved development - to alter the height of the window cill at ground floor level, and new external paint finishes to the front and rear elevations including windows.

Amendments to planning permission dated 20th December 2019 (RN 19/07003/FULL) for the replacement of front facade, remodelling of seventh floor with plant enclosure above, removal of external escape stair and rear extension on first to seventh floors for Class B1 office use. Creation of ornate terrace at rear first and second floor level (no general access) and with creation of balconies/terraces at 5th to 8th floor level to the rear and 6th to 7th levels on the Hanover Street frontages for use in association with the office (Class B1) accommodation; erection of a fire escape platform at rear third floor level to serve neighbouring buildings, use of part basement and part ground floor as restaurant (Class A3). NAMELY, to simplification of Zinc Standing Seam Cladding pattern as part of the design development; Reduction of UKPN door height (decorative fins continue full height) to accord with technical requirements; Restaurant entrance door widened to comply with fire strategy and moved to align with windows above; Indent introduced at side of rear facade; addition of external ductwork in recessed indent. This is due to technical ME requirements and the reduction in the building footprint; Extents of glazing screen on ground floor rear facade reduced in accordance with the requirements under Building Regulations Part B; Extents of green wall on 8th floor terrace revised as part of refining the hard and soft landscaping strategy; Addition of 10 secure cycle parking spaces for the restaurant as required by Condition 11; Addition of external cast iron hoppers and drain pipes on rear facade to facilitate drainage of roof areas; Form of rooflights on First Floor simplified to better fit with architectural style of proposal; and details of the junction between the proposed new front facade and neighbouring properties refined.

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.