Erection of a rear roof extension, including installation of a door with a Juliet balcony; installation of 2no. rooflights in the front roofslope; and installation of a rooflight in the flat roof of the existing two storey back addition at second floor level .

Conversion of the existing property into 3no. flats (consisting of 1 x 2 bedroom at lower ground floor level, 1 x 2 bedroom at upper ground floor level, and 1 x 2 bedroom maisonette at first and second floor level); erection of a part one part two storey rear extension at lower ground and upper ground floor level; replacement of all existing windows with new double glazed timber framed windows; erection of a replacement external staircase with new metal railings to the front elevation from ground to lower ground floor level; erection of a bike and a bin store in the front garden at lower ground floor level; erection of glazed privacy screens and metal railings over part of the proposed rear extensions at lower ground and upper ground floor level, in connection with its use as roof terraces; erection of a new external staircase following the removal of existing external staircase, to the rear elevation from upper ground floor level to rear garden; installation of timber framed French doors with fixed window panels following the removal of 2no. existing windows, to the rear elevation at first floor level, to provide access to the proposed roof terrace.

Variation of condition 2 of planning permission ref: 2022/00949/FUL granted 13th July 2023 for the 'Erection of a part one/part two storey extension to the main building at roof level following removal of existing plant; plant enclosure at seventh floor level; three-storey tiered extension to the side and rear of the building at second, third and fourth floor levels; roof terraces at fifth and seventh floor levels; alterations to ground floor frontage and the first floor northern elevation; replacement windows; external alterations; provision of refuse storage at ground floor level and cycle storage at basement level, in connection with the provision of an additional 4,539sqm (GEA) of high grade Class E(g)(i) office space (16,301sqm (GEA) in total)' to allow amendments to the approved drawings to include: accommodate a larger substation within the existing building envelope on the ground floor; repositioning of doors and rooflights on the green roof of the second floor; repositioning of roof lights on the second, and fourth to seventh floor terraces/green roofs and roof level; brick detailing/infill added to part of east, north and south elevations; new louvre for basement smoke extract on south and north elevations; and reposition louvre on west elevation.

Erection of a single storey rear extension, to the side and rear of existing back addition.

Variation of conditions 2, 3 and 5 of planning permission 1998/01169/FUL (allowed on appeal T/APP/H5390/A/98/299625/P5) for the 'Erection of a three storey building to provide a new sports and leisure centre and a museum' to allow the use of the Chelsea Health Club for hospitality use and to amend the hours of use.

Variation of condition 2 (approved drawings), 3 (materials) and 7 (obscure glazed screen) of planning permission ref: 2021/04131/FUL granted 25th January 2023 for the 'Erection of a rear roof extension; erection of rear extensions at lower ground level; excavation of part of the front garden to form lightwell in connection with the enlargement of the existing basement; erection of external staircases from basement to upper ground floor level in connection with the formation of a roof terrace at upper ground floor level to the rear elevation; replacement of existing windows and glazing with new windows and glazing, at the front and rear elevation; erection of railings and pedestrian entrance gate at the front elevation; installation of access ladder at basement level to the front of the property' to allow the replacement of obscure glazed screens with iron railings to the rear elevation at upper ground floor level and to the side of the external staircase from basement to ground floor level at the rear of the property.

Erection of a part two part three storey side extension with hipped roof, at ground, first and second floor level; installation of a new window, replacement of an existing window with a new enlarged window to the rear elevation, installation of a new window to the side elevation at ground floor level; formation of bike and bin stores together with 3no. car parking spaces, electric vehicle charging points, and private amenity space in the rear garden; associated landscaping of the front and rear gardens; conversion of the existing single dwellinghouse into 3no. self-contained flats.

Erection of a rear extension at second floor level, over part of the existing back addition.

Erection of an insulating wall behind existing timber garage doors, in connection with the conversion of existing garage into habitable accommodation at ground floor level.

Erection of an enlarged rear dormer roof extension, following the demolition of existing; erection of railings on top of the existing first floor back addition, in connection with its use as a roof terrace; installation of 2no. rooflights in the front roofslope.