Excavation of basement level beneath footprint of existing house with walk on rooflights; Rebuilding of bathroom extension at lower ground floor; Erection of extension at ground floor level over octagonal wing and creation of new parapet; Erection of infill extension on northeast elevation; Remodelling of bay on southeast elevation at lower ground floor level; Erection of replacement dormer; Demolition of existing retaining walls on south east elevation and eastern lightwell and construction of new metal escape stairs in these location; Replacement of windows; Rationalisation of drainage, repair of stucco render, repair/ refurbishment and part replacement of existing roof, refurbishment/ replacement of existing chimney and pots; Installation of Plant Machinery; Erection of bin and bike store to front garden; and associated external alterations.

Refurbishment and extension of the building on Luxborough street extending to Bingham Place; remodelling and extension of roof to provide internal and external terrace floorspace extensions to house a lift to rear at lower ground to fifth floor; use of part of ground floor as a café all in association with the use of the building as Learning and non-residential institutions (Class F1 ).

Demolition and replacement of existing fifth floor, demolition of existing plant room, and erection of a single storey roof extension at sixth floor to 2-6 Stanhope Row with replacement windows, terraces at fifth and sixth floors and remodelling works; demolition of 16 Stanhope Row, 16a, 16b and 17 Market Mews, excavation at basement level and erection of a four-storey (plus part basement floor) replacement building, all to provide an 82-bedroom hotel (Class C1). Demolition of 37 Hertford Street and erection of replacement building (basement to fourth floor mansard roof plus rooftop plant enclosure); and Internal and external alterations to 36 Hertford Street including demolition and remodelling of existing mansard roof; together with excavation at basement level to 36 and 37 Hertford Street to lower existing basement slab level; all to provide 16 residential dwellings (Class C3) along with provision for cycle parking, terraces, refuse storage and rooftop plant, together with other associated works.

Remodelling of roof to provide third floor level, extension to sub-basement, replacement conservatory and associated fenestration and facade changes. Installation of plant within the roofspace with louvres on the rear elevation and installation of PV panels at main roof level. (Site includes 31 Hay's Mews)

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.

Variation of Conditions 7 and 9 of planning permission dated 28 September 2021 (RN: 21/02324/FULL) for the: Excavation of a new basement level, erection of a mansard roof extension, and two storey infill extension (rear ground and lower ground floor level) and remodelling of the ground and first floor extensions to the existing closet wing and single storey extension at rear third floor level; NAMELY, to allow the removal of existing tree and replacement with a new tree and submission of Phases 1-3 of the contaminated land remediation details.

External alterations to the building including: alterations to the front facade; replacement entrance, shopfront and canopy; remodelling of the rear facade at the sixth and seventh floors; installation of roof terraces at the sixth floor, seventh floor and at roof level; extension of lift shaft to roof level; new plant enclosure; lightwell infill; and associated external works in connection with the ongoing use of the building as offices (Class E).

Excavation of a new basement level, erection of a mansard roof extension, and two storey infill extension (rear ground and lower ground floor level) and remodelling of the ground and first floor extensions to the existing closet wing and single storey extension at rear third floor level.

Remodelling of the rear facade, increase in height of rear closet wing and relocation of existing air conditioning unit on the raised flat roof over the ground floor extension.