Excavation of a new basement, extension at rear lower ground to first floor levels with mechanical plant and enclosure to the roof of the new extension and installation of double glazed windows. Internal alterations including replacement of lift and dumb waiter within their existing shafts, replacement of window sashes with double glazing and repairs to the roof.

Internal and external alterations including excavations of extended basement floor, erection of replacement rear extensions, formation of roof terraces, replacement of mansard roof extension and installation of mechanical plant at roof level to No.73, alteration and replacement of external railings and new windows and doors, new floor finishes, and internal alterations to all floors. (Linked to 23/00770/FULL)

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)

Internal alterations at all levels, Installation of 4x air source heat pumps at roof level, single-story extension to the existing rear ground floor to extend existing office use, erection of small closet extension to accommodate WCs at rear mid-ground/first and mid-first/second floors, replacement of non-original windows with double glazed timber sash windows, external repairs to building and associated works. (Linked with 22/05897/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

External alterations including replacement of the attic style roofs with mansard roof extensions, installation of new mechanical plant within an enclosure, new sliding rooflight and replacement of the existing rooflight with a new rooflight and planters to proposed roof level terrace and raised parapet. Installation of new windows and doors. Associated internal alterations including replacement of lift from lower ground to third floor.

Internal alterations and external alterations including refurbishment of the existing windows and the introduction of slimline double-glazed units into the existing frames; limited window replacement on rear elevation; extension to rear mansard roofslope; replacement of roof level plant and installation of plant screen; infill of redundant lightwells to all office floors; façade refurbishment works; and improvements at basement level to provide end of Trip facilities including showers and bike storage, introduction of a dry riser to the façade of 172 Piccadilly; replacement of five windows and doors to the rear elevation so they align with the terrace works approved under RN 23/015211/LBC and RN 23/01520/FULL (SIte includes 169 Piccadilly)

Alterations to the size and number of dormers to the rear roof extension serving Flat 4.1, re-positioning of the existing handrail to the front roof area and installation of a new roof access enclosure to the front part of the roof area and insertion of a high level window at basement level. Internal alterations comprising of reconfigured partitions at basement to fourth floor level and reconfiguration of staircase between ground and basement level.

Internal alterations at all levels to accommodate office refurbishment, installation of 4 x heat pump units and photovoltaic panels at roof level, replacement of rear basement rooms and single storey extension to rear ground floor to extend existing office use, re-construction of existing wc closet extension at mid first/second floor level, replacement of existing window sashes with double glazed timber sashes, external repairs to building and associated works, all in connection with continued office use.

Erection of single storey ground floor rear extension (part solid and part glazed infill), removal of vents on front facade windows, replacement rooflights at main roof level, and internal alterations (Linked with 23/02245/FULL).