Installation of a passenger lift and a new spiral stone stair in the location of the existing redundant secondary staircase; demolition and redevelopment of late 19th century rear addition; courtyard extension to the north side of the property, with Marylebone Mews frontage and use as a member's club (sui generis); alteration of roof-escape to accommodate plant behind a new pitched roof; addition of a replacement stair from second to third floor, following the demolition of late 19th century additions at these levels; and internal alteration and refurbishment, including the upgrading and re-routing of services. (Linked with 23/05228/FULL)

Demolition of existing lower ground rear extension and second floor closet wing extension; Erection of new two storey extension in rear courtyard and replacement second floor closet wing extension; New external stair to front lightwell; Alterations to the existing rear closet wing; Replacement roof and dormers; Remedial structural and maintenance works. Internal alterations, including to partitions.

Removal of rear conservatory and replacement with new rear extension to lower ground floor level with associated works to rear patio and boundary wall; Removal of infill extension to the front lightwell at lower ground floor; Demolition and rebuild of the rear section of the third floor level; Installation of skylight and replacement of windows to existing side wing; Replacement of rear ground floor balconettes ; Installation of new raised planting bed to existing front lightwell; Excavation of new basement level beneath building footprint, part of front lightwell and rear garden; Installation of plant machinery within existing front vaults; and internal alterations to each floor level (Linked with 22/06680/FULL)

Excavation of basement with lightwells to front; Demolition and replacement of rear extension at lower ground floor level with terrace at ground floor level; Excavation to lower ground floor and rear garden; Use of garage for additional internal accommodation; Installation of plant machinery to rear; Demolition of garden house; Replacement of windows throughout (part-retrospective); Landscaping works to front and rear gardens; and associated external and internal alterations. (Linked to 23/04725/FULL)

Demolition of garage to side and conservatory to rear at lower ground floor level; Erection of two storey extension to side and rear and single storey extension to rear with terrace above; Installation of plant machinery within enclosure in rear garden; Lowering of lower ground floor level and part of rear garden; Hard and soft landscaping works; Changes to fenestration and external alterations. Internal alterations, including changes to plan form.

Demolition of the existing rear modern extension and replacement with new infill extension at basement, ground and first floor level. Reconfiguration of existing residential accommodation across all floors. Installation of a new lift for level access; installation of new windows and external plant units at rear second floor level and; associated internal and external alterations.

Partial demolition of the ninth floor and erection of single storey extensions to the south, north and east (rear) of the ninth floor, erection of new kitchen extract riser, replacement windows, together with replacement plant and equipment to the roof of the ninth floor, and other associated internal and external alterations. (Linked to 22/08705/FULL)

Demolition and replacement of existing lower ground floor rear extension with lowered floor level and enlarged terrace above, infill of existing lower ground floor courtyard and creation of new courtyard at lower ground floor level, extend existing parapet along the first floor roof, partial infill of front lightwell, alterations to fenestration throughout including new access doors to ground floor terrace, replacement metal staircase to front lightwell, partial excavation and underpinning of lower ground floor level to lower floor level, internal alterations throughout all in connection with use of the building as a single family dwelling

Demolition of rear extension at lower ground floor; replacement of front and rear elevation windows with new double glazed timber sash windows; installation of new paving slabs in the front lightwell; alteration to vault including replacement of doors and spaces converted into services and refuge storage, bike storage and general storage; landscaping of rear courtyard with stone flooring; external repair and redecoration of all building fabric elements and external areas; repair, levelling, strengthening of floors and other key structural elements; layout alterations and refurbishments; and associated works. (Linked with 23/04615/FULL)

Alterations and extensions to the Ritz Hotel and William Kent House including the change of use of the casino to a dual flexible use as hotel and/or private members club, a two storey side extension to William Kent House, extensions to the Ritz hotel including on the site of 22 Arlington Street comprising an extension of five basements, lower ground, ground, mezzanine and seven upper floors to provide additional hotel floorspace, new and upgraded hotel facilities including hotel rooms, restaurant and spa, new entrances on Arlington Street, arrival and drop off facilities, changes to the servicing and refuse facilities, car and cycle parking, plant, landscaping and all works including demolition, enabling, highways and other ancillary works (Amendments to listed building consent dated 15 March 2023 RN:23/00253/LBC).