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 01 March 2012 (RN:11/11498/FULL) for use of part ground and upper floors as a single dwelling house (Class C3). Demolition of part of the existing two storey rear extension at ground and first floor level to create an open patio area. Construction of rear extension at second floor level. Removal of part of the existing roof and attic space to create a roof terrace and rooflight and screen to front elevation. Alterations to front and rear elevation windows and doors. Namely, repositioning balustrade and flank wall extended.

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 02nd June 2021 (RN: 21/03676/FULL) for introduction of new timber bi-fold casement windows at ground floor; introduction of new timber double doors to the second floor Foubert's Place elevation to provide access to the roof terrace; provision of a kitchen extract duct to the side elevation of Lasenby House (32 Kingly Street) to roof level; construction of a plant enclosure to the roof; and extending internal stair from first to second floors within the lightwell at rear of the building. NAMELY, revised route of extract duct through the rear wall at 1st floor level and around the lift shaft; revision to door location in slate clad plant enclosure; omission of vertical extension in lightwell at 2nd floor level.

Amendments to planning permission dated 30 March 2022 (21/07642/FULL) for the variation of Conditions 1, 20, 21, 23, 24 of planning permission dated 16th March 2021 (RN 20/04933/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; 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, Street scape enhancements (Front elevation - Carlton House Terrace and Facade realignment); Amenity enhancements (Inclusion of glazed doors to external terraces (west elevation), external terraces and Level 10 Roof Access) and Detailed design and technical amendments (Widening of the central 'core strip' and Balustrade Position at level 10).

Amendments to planning permission dated 23 June 2020 (20/02062/FULL) for Erection of single storey rear extension at lower ground floor level and installation of new windows, and the replacement of existing windows and the front door. Namely, remove the annotations relating to the construction methodology to the balcony at the upper ground floor level to reflect the fact that temporary removal is no longer required.

Amendments to planning permission dated 16th March 2021 (RN 20/04933/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 1 for flexible/alternative office (Class B1)/retail (Class A1)/leisure uses (Class D2); basement level 2 for 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 namely to amend the wording of Condition 3 to allow the demolition phase to be split into phases.

Amendments to planning permission dated 16th March 2021 (RN 20/04933/FULL) for '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 1 for flexible/alternative office (Class B1)/retail (Class A1)/leisure uses (Class D2); basement level 2 for 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'. NAMELY, to remove reference to level 1 and basement level 2; and for the description of development to read as follows: '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 levels 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'.

Amendments to planning permission dated 16 March 2021 (RN: 20/04933/FULL) for 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 1 for flexible/alternative office (Class B1)/retail (Class A1)/leisure uses (Class D2); basement level 2 for 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; NAMELY, to vary the wording of Condition 6 from 'prior to commencement' to 'you must not start any work on these parts of the development'.

Amendments to planning permission dated 13th August 2021 (RN: 21/04242/FULL) for demolition of existing ground floor rear extension and erection of extension at ground floor level and first floor level; construction of a terrace at first floor level above ground floor extension; construction of a ground floor extension to front elevation (replacing a garage); and second floor roof extension. Namely, to replace the arched window opening to the porch on the front elevation of the new single storey extension with a door.