26/04154/NMAPlanning Application 26/04154/NMA
Amendment application at 43 - 45 Portman Square London W1H 6LY, Westminster. View planning documents, track the decision and get email alerts on updates.
Amendments to planning permission dated 02 March 2026 (RN: 25/06153/FULL) for the variation of Condition 1 of planning permission dated 7th April 2025 (RN: 24/04987/FULL) for, 'Partial demolition of the existing roof and removal of plant equipment; construction of a roof extension providing new office (Class E) floorspace with associated external amenity spaces and plant equipment; refurbishment of the existing building, including infilling of the existing atrium; alterations to the existing façade; provision of cycle parking spaces and end of journey facilities, and all associated and ancillary works'; Namely,the retention of existing cores, the infilling of atria, the provision of additional rooflights to the western 3rd floor terrace, layout changes at ground and lower ground levels and changes to some windows on the eastern façade and retention of existing first floor windows, resulting in single storey full height glazing to the retail frontages along Orchard Street (Application under Section 73 of the Act); NAMELY rooftop plant screening; enlargement of lift overrun; adjustments to PV layout; reconfiguration of Level 10 north façade with doors and panels; consolidation and removal of blue roofs at Levels 10 and 8; enlargements of SW stair roof with addition of vent for pressurisation; updating of south façade windows with discreet vents; alerations to NW mansard for maintenance access; addition of additional louvres for building services.
26/04154/NMA
43 - 45 Portman Square London W1H 6LY
This is an application to amend a permission at 43 - 45 Portman Square London W1H 6LY. Westminster has handled 604 applications of this type and approves 80% of them, typically deciding them in 40 days. It was submitted on 23 June 2026 and is still awaiting a decision. The site is in the Portman Estate conservation area, with 2 listed buildings nearby. There have been 4 other applications at this address. In the past year there have been 561 applications across West End. We hold 686 applications in total for the W1H postcode area.
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Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
Source: Westminster