Erection of rear extensions at lower ground, ground and first floor levels; erection of railings on part of top of the proposed lower ground floor rear extension and replacement of trellises on side boundaries with close boarded fencing, in connection with the formation a roof terrace; installation of new French doors following the removal of existing window, to the rear elevation at ground floor level, to provide access to the proposed roof terrace; erection of a new enlarged dormer window following the removal of existing in the rear roofslope; lowering the lower ground floor level; demolition of existing external staircase and steps and formation of new steps with metal railings and handrails in the rear garden; associated landscaping of the rear garden.

Two storey side extension, single storey front entrance porch, alteration to existing first floor roof pitch and installation of 3 x dormer windows with associated external and internal alterations. Conversion of existing garage to living accommodation. Provision of first floor balcony to south elevation and hipped roof to bay window. Demolition of existing outbuildings and associated landscaping and fencing.

Double storey extension to the rear to enclose existing external staircase; demolition and replacement of the existing cold room to the rear; small hot water plant room to the rear; new plant and equipment on the roof and at ground level to the rear; a new sub-surface waste water treatment unit / underground attenuation tank; replacement roof covering; new entrance doors; alterations to car parking, landscaping and fencing to the rear.

Non-material amendment pursuant to approved application 22/01342/FUL dated 22.09.2022 (Change of use of gym (D2) to self-storage facility (B8) with ancillary office space, associated roof alterations (including an increase in overall ridge height), elevational changes, landscaping and infrastructure (including new fencing) and demolition of existing ground floor extensions) to allow external alterations to the approved building

Amalgamation of 2no dwellinghouses into a single family dwellinghouse; erection of rear extensions at third floor level, on top of the existing back additions; demolition of existing single storey rear extensions and erection of a replacement single storey rear extension including the formation of an enlarged roof terrace above the roof of ground floor rear back addition; excavation of the front garden to form lightwells in connection with the enlargement of the existing basements; replacement of existing dormer windows with new dormer windows comprising of windows and French doors with Juliet balconies in the rear roofslope; installation of 2no rooflights in the front roofslope to no. 6 Dewhurst Road; replacement of existing windows with new windows and replacement of the existing single door with double doors at first floor level to the rear elevation; removal of rear fencing and front wall between no. 6 and 8 Dewhurst Road and installation of replacement refuse and cycle stores; erection of new front boundary wall with railings on top and a pedestrian access gate to no. 8 Dewhurst Road; associated landscaping in the front and rear gardens.

Two storey side extension, single storey front entrance porch, alteration to existing first floor roof pitch and installation of 3 x dormer windows with associated external and internal alterations. Conversion of existing garage to living accommodation. Provision of first floor balcony to south elevation and hipped roof to bay window. Demolition of existing outbuildings. Realignment of existing entrance driveway, construction of inset detached garage and associated landscaping and fencing.

Single storey rear extension (following demolition of existing conservatory). Conversion of garage to habitable room including replacement of garage door with new window. Various alterations to fenestration. Enlargement of roof to side and rear. Covered car port to side. Pergola to rear. Various landscaping alterations including new terraces, paths and driveway alterations. New fencing and gates. Widening of existing vehicle access.

Demolition of garage, erection of relocated single garage and single storey extension to the rear of proposed garage. Alterations to roof of rear bay window and reconfiguration of openings to kitchen/dining rooms to include the addition of a larger relocated side bay window. Internal/external alterations to ground and first floor. Re-landscaping of front garden/driveway to include replacement fence and extension of raised patio to rear garden.

Amendments to planning permission dated 18th February 2021 (RN:20/06601/FULL) for Variation of condition 1 of planning permission dated 21.5.20 (RN:19/07406/FULL), which itself varied condition 1 and 9 of planning permission dated 20.11.18 (RN: 18/03520/FULL) which itself varied condition 1 of planning permission dated 12 September 2017 (RN: 16/06423/FULL) for, 'Alterations to the existing building including retention & repair of the front and side facades, part demolition & replacement of the rear facade, rear extension of the 2nd-5th floors, removal of existing & introduction of a new 6th floor, introduction of a new set-back 7th floor, extension of the existing basement levels to include two additional basement levels (including one mezzanine level), installation of roof plant & plant screen, public realm works including hard & soft landscaping, removal of the security kiosks, fencing, bollards & gates/barriers to Blackburne's Mews & Culross Street, removal & replacement of 6 No. trees in front of the Grosvenor Square elevation & re-opening of the road on the western side of the Square, all in connection with the use of the building as a hotel (Class C1) with flexible retail/restaurant use at 1st floor, ground floor and basement 1 (Class A1/Class A3/Class C1), flexible restaurant/bar use at 7th floor (Class A3/Class A4/Class C1), leisure/spa facilities within the basement (Class D2/Class C1) & an ancillary ballroom, event spaces, back of house facilities & associated car, cycle parking & servicing facilities accessed from Blackburne's Mews, & other associated works' - NAMELY, to amend Condition 17 to remove reference to the seventh-floor level [requiring public access] and an additional condition to read as follows: The area at seventh floor level designated as a restaurant/bar (Flexible Class A3/A4/C1) must remain open to members of the general public (whether or not they are guests at the hotel or visitors of hotel guests) on not less than 200 days per year

Demolition of existing entrance porch and construction of replacement entrance porch, demolition of existing garage, gym and part demolition of single storey utility wing and construction of replacement double garage and cinema room extension, single storey rear extension with roof terrace over, reinstatement of window opening to existing lounge, two storey side extension with window and flat roof over, and landscape works to include new boundary gates, fence and driveway.