Amendments to planning permission dated 23 February 2022 (RN: 21/07541/FULL) which was in itself an amendment to a previous permission for the 'Erection of infill extension at basement level in order to enlarge existing office (Class B1), use of part ground floor on Mount Street elevation as a shop (Class A1) accessed from existing bay, erection of roof extension to enlarge existing flat (Class C3), insertion of new windows and doors on the north and east elevations, creation of a residential terraces at third floor level and provision of plant within existing vaults'; NAMELY, to wall mount air condenser units in an enclosure within the front lightwell underneath the external stair along the Balfour Place frontage instead of within the basement vaults.

Alterations and extension to 30 Gloucester Place (including 91 Blandford Street and 112 George Street) including refurbishment of the lower ground, ground and first floors, extension of the lower ground floor; external works including part demolition of facades, ground floor and removal of ramp to create a new a triple arched walkway through the building with canopy, railings, security gates, new steps and ramp to provide level access to the 30 Gloucester Place entrance, a rear elevation connection with the proposed single storey retail units within the courtyard, new ramp and railings to 112 George Street entrance; façade maintenance and refurbishment; painting and repair of the rear elevation; replacement or refurbishment of windows and doors at ground and first floor; replacement railings; installation of two CCTV cameras; removal of the existing roof plant. Internal reconfigurations at basement, ground, first, second, third and roof level, including the reduction of the basement footprint, demolition of the lift machine room, demolition and relocation of the waste chute and lift, re-configuration of the office internal stair core, creation of an office lobby area, improvements to the retail arcade layout, re-configuration of the residential corridor and units at first floor. External alterations including removal of the existing BMU, introduction of a new MEP louvre, demolition of the railings on top of the lightwell, proposed MEP risers, insertion of a new brick screen at roof level to match the existing, windows to be refurbished to match the existing, new proposed windows to parts of the north and south elevation at first floor as a result of the internal reconfigurations. Works to the building, including changes to the East Elevation façade including additional non-openable windows, changes to the layout of the ground floor retail units, refurbishment of the roof.

Amendments to planning permission dated 23rd January 2023 (RN: 22/05428/FULL) for two-storey extension including roof-level plant along the Bressenden Place façade to provide a new office entrance pavilion (Class E), the provision of Class E office / retail accommodation, remodelling of the crown of Portland House and creation of a setback rooftop extension to provide office amenity (Class E) and an outdoor terrace, reconfiguration of the second floor plant accommodation fronting Cardinal Place, relocation of the zephyr on Bressenden Place, provision of cycle parking, public realm and associated works including window replacement and the application of a new façade treatment, namely to amend the wording of Condition 3 (Code of Construction Practice) to enable early works to be carried out in accordance with the Appendix A dated 22/11/22 signed by the Environment Inspectorate and prior to the discharge of Condition 3.

Amendments to planning permission dated 1st October 2021 (RN:20/06914/FULL) for, 'Variation of conditions 1, 31 and 35 of planning permission dated 4 March 2020 (RN 19/06767/FULL) (amended by 20/05397/NMA) which permitted the following development : Demolition of the existing buildings at 19-35 Baker Street, 88-110 George Street, 69-71 Blandford Street and redevelopment to create a mixed use scheme providing commercial uses and up to 51 residential units within a new ground plus nine storey building (and an enclosed plant area) on Baker Street; a new stepped ground plus four to ground plus six storey building on George Street; refurbishment, extension and the change of use of the first floor from office to residential at 30 Gloucester Place; creation of a single storey basement level linking the Baker Street and George Street buildings to provide car and cycle parking, refuse and servicing; creation of a new central, publicly accessible courtyard; removal of 5 trees and replacement trees across the site, a new publicly accessible route at ground level connecting Baker Street and Gloucester Place; associated plant, landscaping, replacement pavements in part and other associated works'. Namely, Works to the building, including changes to the East Elevation façade including additional non-openable windows, changes to the layout of the ground floor retail units, refurbishment of the roof, and other associated works

Variation of condition 1 of planning permission dated 19 April 2021 (RN: 20/04541/FULL) for the: Erection of an extension at the rear of 18-22 Wigmore Street at first to fourth floor levels and alterations to the rear roof form to allow conversion of the attic space to provide additional residential floorspace for the existing flats (Class C3), including the infilling of an internal lightwell adjacent to 16 Wigmore Street and the installation of a new lift. Alterations at basement and ground floor level including the infilling of a rear lightwell at basement and ground floor levels. Installation of plant within an associated enclosure at rear first floor level with a green roof over and screened plant on a flat roof at fourth floor level to the rear of 22 Wigmore Street. Alterations to the front of the building including new windows, shopfronts and metal railings at ground floor level. All in connection with the dual / alternative use of the basement, ground and first floors as either office (B1) / retail (A1) or a sui generis use comprising piano showroom, office space, new recital room, piano practice rooms and workshop space and use of the second to new fifth floors as 8 residential units comprising 3 x 1 bed; 4 x 2 bed and 1 x 3 bed. (SITE INCLUDES 18, 20 AND 22 WIGMORE STREET). NAMELY, to allow removal of central core and floors and associated replacement to improve sustainability, acoustic and fire safety performance; modifications to ancillary uses within basement, including provision of ancillary kitchen and restaurant area serving guests of Bechstein Hall; kitchen extract and ductwork to be localised; introduction of entrance gates to main front entrance; minor amendments to plant at the rear; and provision of open pergola walkway on the roof at the rear.

Amendments to planning permission dated 4th September 2020 (RN:20/03854/FULL) for Variation of Condition 1 of planning permission dated 23 April 2019 (RN 18/10640/FULL) for, 'Demolition and replacement of existing fourth floor, demolition of existing plant room, and erection of a single storey roof extension at fifth floor and rear extension at second to fifth floor levels in connection with existing office (Class B1) use, provision of new main office entrance, flexible use of part ground and basement floor for either retail or office use (Class A1/B1), creation of roof terrace at fifth floor level, provision of cycle parking spaces and facilities, roof plant and associated external alterations, including replacement windows. Namely,the removal of decorative window bars at fourth floor level on all elevations.

Two-storey extension including roof-level plant along the Bressenden Place façade to provide a new office entrance pavilion (Class E), the provision of Class E office / retail accommodation, remodelling of the crown of Portland House and creation of a setback rooftop extension to provide office amenity (Class E) and an outdoor terrace, reconfiguration of the second floor plant accommodation fronting Cardinal Place, relocation of the zephyr on Bressenden Place, provision of cycle parking, public realm and associated works including window replacement and the application of a new façade treatment.

Amendments to planning permission dated 28th October 2022 (RN: 22/04598/FULL) for Alterations to the building including installation of a new shopfront; infilling of the lightwell at rear lower ground and ground floor levels, extension at rear fourth floor level, creation of terrace areas at rear first, fourth and fifth floor levels; installation of a high level extract on the rear elevation, new plant with associated screening and PV panels at main roof level; replacement windows; and associated external works. Use of part ground and basement floors as retail, restaurant or office (Class E). Namely, proposed amendments including the size and location of a number of windows shown on the south and rear elevations, the coping stones added around the terraces, the fire protection treatment of the staircore, the extent of the render finish shown on the south and rear elevations, the inclusion of the rear escape staircase at lower ground level and an escape stair at roof level, the number of rooflights shown on the first-floor terrace and a slightly different roof configuration.

Alterations to the building including installation of a new shopfront; infilling of the lightwell at rear lower ground and ground floor levels, extension at rear fourth floor level, creation of terrace areas at rear first, fourth and fifth floor levels; installation of a high level extract on the rear elevation, new plant with associated screening and PV panels at main roof level; replacement windows; and associated external works. Use of part ground and basement floors as retail, restaurant or office (Class E)

Variation of Conditions 31 and 32 of planning permission dated 30 March 2022 (21/07642/FULL) for the demolition of existing mansard roof and roof level plant and construction of two storey vertical roof addition with extensions at fourth, fifth, sixth and seventh floor levels for additional office (Class B1) floorspace. Use of the lower ground and basement level for flexible/alternative office (Class B1)/retail (Class A1)/leisure uses (Class D2); car parking, cycle parking, ancillary office uses and mechanical plant. Alterations to the existing building including new windows and entrance, new terraces to eighth and tenth floor levels and new plant enclosure at roof level and associated works; and amendments to car parking provision (retention of the public car park), alterations to the cycle parking provision and basement layouts and reduction in flexible commercial floorspace; namely, to amend the wording of Conditions 31 and 32 to require the landscaping of the first floor terrace to be carried out in accordance with the submitted details.