Amendments to planning permission dated 20 July 2021 (RN: 20/07187/FULL) for demolition of existing property and erection of a five-storey building (with basement level) incorporating a lightwell to the Elgin Avenue frontage and plant at roof level to provide a commercial unit at ground and basement and residential dwellings at basement, ground and upper levels.; NAMELY, improved layout of residential units; incorporation of unit F3, F5 and F7 balcony space into internal space; reduction of unit F8 amenity space; relocation of staircase and lift shaft; amendments to windows and doors; reduction of size and reconfiguration of basement level commercial space; reconfiguration of ground floor commercial space; circular staircase for fire escape from basement level; reduction of floor-to-floor heights at all levels; reduction in roof footprint and plant reconfiguration; increase of window dormer cheeks and roof thickness; introduction of smoke shaft and other services for fire and building regulations.

Amendments to planning permission dated 19 April 2021 (RN: 20/08120/COFUL) for variation of condition 1 of planning permission dated 29 March 2019 (RN: 17/11404/COFUL) for the demolition of existing buildings and structures and erection of new building of up to five storeys plus basement floor to provide 49 residential units (Class C3); with car and cycle parking, storage and plant rooms at basement level and landscaping to central garden and site frontages and associated works from RN: 17/11404/COFUL, namely, to vary the approved drawing numbers to amend the design of the building facade depth to reduce the depth of the brick reveal; NAMELY, alteration to plant & location of access hatches/AOV to roof including boiler flue; basement ventilation penthouse louvres added; PV panels updated to specialist design; minor amendments to main entrance doors; minor amendments to courtyard doors; location of bike stand updated to approved planning application; car lift door design updated to specialist design; bike/Bin lift lobby doors amended to specialist design; generator room door updated to specialist design; unit 4.04 layout includes L-shaped corridor to fire engineers guidance; and unit 4.04 Window amended.

Amendments to planning permission dated 24 November 2022 (RN: 22/04522/FULL) for demolition of existing buildings and the construction of a new five storey building, with a rebuilt front facade to no. 74, to provide 7 residential flats and the excavation of basement to provide car parking, plant and bike storage; demolition of existing rear garages and the erection of 2 additional residential dwellings. Introduction of a car lift; and associated landscaping; NAMELY, changes to the fenestration on the flank elevations at third floor level only, adding additional windows.

Amendments to planning permission dated 6th June 2017 (RN: 17/01932/FULL) for Excavation of basement with associated lightwells and mechanical plant, demolition and replacement of existing side extension and alterations to dormers at roof level and fenestration/doors to elevations, associated works to front and rear gardens. Namely, to make internal and external changes to the consented scheme including layout changes, increase in basement pool (remaining within the approved piling layout), removal of lantern rooflights, installation of a new lift and installation of acoustic lining to party wall.

Amendments to planning permission dated 5th May 2021 (RN:20/03389/COFUL) for Demolition of existing car park and redevelopment to provide a 4-storey block of sheltered residential dwellings (Use Class C3) and other associated works, including amenity space, car parking, cycle parking, refuse storage, and landscaping improvement works. Namely, amendments to the main entrance including the removal of a column adjacent to the main entrance; changes to windows and exit doors in order for compliance with AD Part B; addition of a new pedestrian exit door to the south elevation to Hall Place; addition of a cleaners store to the ground floor plan to provide storage and a sink for Westminster City Council to maintain the communal areas of the building; installation of air bricks to all elevations; raising of mansard window cills; updated roof layout including updating the layout of the photovoltaic panels and the omission of the mansafe system in favour of a fixed rooftop balustrade; incorporation of a fire corridor to all the apartments; alterations to the internal room sizes and 4 of the 20 units will be designed to full Part M4(3) Wheelchair User standards and be fully wheelchair accessible, changes to EVCP layout and insertion of louvres to the facades .

Amendments to planning permission dated 27 March 2019 (RN: 17/02394/FULL) for alterations and extensions, including demolition and reconstruction of rear extensions, excavation of basement floor, removal of tree, alterations to front boundary wall, installation of mechanical plant, erection of cupola at roof level, use of part of garden to rear of No.8 Ordnance Hill, and internal works to all floor levels in connection with the use of the building as five residential apartments (2x3 bed, 2x2 bed, and 1x1 bed flats); namely, the insertion of a new sash window to match the existing windows in the East elevation of the original chapel building; the introduction of powder coated aluminium windows within the new rear block, providing a consistent design approach within this new part of the building, and allowing an enhanced environmental performance to be achieved; and the simplification of the façade treatment of this new part of the building, (simplified cornice detailing, omission of window surround detail)

Amendments to planning permission dated 24th February 2023 (RN:22/08167/FULL) for Refurbishment of 41, 42 and 43 Hay's Mews, including the demolition at first floor level to create an enlarged terrace and internal linkage, installation of trellising and planting; installation of double glazing to all windows and secondary glazing at ground floor level; installation of 2no. condenser units and 1no WC extraction at roof level; installation of security features, including CCTV cameras; and associated works. NAMELY: revised trellis design, replacement glazing to terrace dome, and associated works.

Amendments to planning permission dated 26th April 2021 (RN:18/05362/FULL) for Variation of condition 1 and 21 of planning permission dated 12 October 2017 (RN: 17/02923/FULL) for the Demolition and redevelopment behind retained facade to provide a building of two basements, ground, part mezzanine and eight upper storeys accommodating retail (Class A1), office (Class B1) and flexible retail / office (Class A1 / B1) floorspace:to allow, alterations to retained facades including replacement windows to the east and south facades, alterations to facing material at rear elevations, clarification of facade reconstruction at parts of ground, first, sixth and seventh floors, alterations to office entrance, reduction of lightwell size on Great Cumberland Place, and reduction of doorway recesses at building entrances - NAMELY, to amend the wording to include flexible commercial uses use (Class E) at basement, ground and part first floor level and office (Class E) within part first floor level and second to eighth floor levels.

Amendments to planning permission dated 21st February 2022 (Ref: 21/01633/FULL) for, 'Installation of new ground floor shopfronts including 2no. new double height entrances; extensive refurbishment of the existing Portland stone facade; replacement of the existing windows between first and fifth floors with new double-glazed units, and modification of the fifth floor windows to increase their height; infill construction along fifth floor Chapel Place in facsimile of the existing facade to provide additional Class E floorspace; installation of ventilation louvres to the Chapel Place elevation at first to fourth levels; demolition of the sixth and seventh floors and erection of replacement sixth and seventh floors (including the creation of new external terrace areas) and new eighth floor roof extension with external terrace areas, all for use within Class E; and consolidation of roof level plant within a single enclosure and provision of a new building maintenance unit at roof level'; NAMELY, to make design changes.

Amendments to planning permission dated 08.06.2022 (RN: 21/07082/FULL) for, 'Alterations to 6 Charles Street to include the erection of a single storey mansard roof extension and changes to the fenestration on Hays Mews elevation, partial demolition and rebuilding of 1 Hay's Mews and amalgamation with 6 Charles Street; all to enlarge existing flats (Class C3). Creation of a courtyard at rear ground floor level of 1 Hay's Mews and a terrace to the rear of 6 Charles Street at fifth floor level, installation of green roof areas to the main roof of 1 Hay's Mews and the rear of 6 Charles Street at part fifth floor level'. [SITE INCLUDES 1 HAY'S MEWS]. Namely, internal alterations to the apartment layouts; alterations to the front elevation of 1 Hays Mews; inclusion of new service risers; alterations to the entrance door and fanlight of 6 Charles Street; amendments to the window fenestration to both the mews internal lightwell and the Hays Mews return elevation of 6 Charles Street; alterations to building materials; cleaning of facades; inclusion of rooflight to the mews roof; inclusion of a mansafe system to the green roof areas; installation of a smoke extract vent over the main stair at roof level.