Planning application
26/04951/NMA
43 - 45 Portman Square London W1H 6LY
Proposal
Amendments to planning permission dated 22 April 2026 (25/06153/FULL) for: Variation of Condition 1 of planning permission dated 7 April 2025 (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; to amend the wording of Condition 27 to allow basement demolition work to proceed.
As published by the council, reference 26/04951/NMA
Timeline
Dates from the published record
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23 Jul 2026
Received by Westminster
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1 Aug 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
About amendments applications
How this application type works
An amendment application changes a permission that already exists. Non-material amendments cover small adjustments with no wider effect, while minor material amendments, usually made by varying a condition, allow modest design changes without a fresh application. Anything beyond that needs a new permission, so the scope here is deliberately narrow.
Nearby applications
Within 500 metres
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26/02687/NMA Awaiting decision
43 - 45 Portman Square London W1H 6LY
Amendments to planning permission dated 22nd April 2026 (RN:25/06153/FULL) for: 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, amendments to mansard roof and rear façades; alterations to skylights and access doors to terraces; alterations to Portman Mews and Orchard Street elevations and to main entrance; alterations to louvres and to internal layout.
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26/04721/ADFULL Awaiting decision
43 - 45 Portman Square London W1H 6LY
Details of accurate and verified estimates of the 'Be Seen' energy performance indicators for the Development as outlined in chapter 3 (Planning Stage) of the Be Seen Guidance pursuant to condition 33 (A) of planning permission dated 7th April 2025 (RN:24/04987/FULL)
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26/00708/ADFULL Granted
43 - 45 Portman Square London W1H 6LY
Details of signed Appendix A of the council's Code of Construction Practice pursuant to Condition 19 of planning permission dated 07 April 2025 (RN: 24/04987/FULL)
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26/00710/ADFULL Granted
43 - 45 Portman Square London W1H 6LY
Detailed method statement for interim and temporary drainage measures during the demolition and construction phase pursuant to Condition 26 of planning permission dated 07 April 2025 (RN: 24/04987/FULL)
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26/00709/ADFULL Granted
43 - 45 Portman Square London W1H 6LY
Details of Construction Logistics Plan to clarify that TfL's assets and services are not adversely affected during the demolition and construction of the application pursuant to Condition 32 of planning permission dated 07 April 2025 (RN: 24/04987/FULL)
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26/04154/NMA Awaiting decision
43 - 45 Portman Square London W1H 6LY
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.
Other amendments applications
In Westminster
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26/04962/NMA Awaiting decision
Serpentine Gallery Kensington Gardens Exhibition Road London W2 3XA
Amendments to planning permission dated 27 February 2025 (RN: 24/08940/FULL) for the installation of temporary art sculpture from 24 March 2025 to 09 September 2025; NAMELY to extend the temporary planning consent until 21st March 2027.
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26/04873/NMA Awaiting decision
Orbis House 5 Mansfield Street London W1G 9NG
Amendments to planning permission dated 05 September 2024 (RN: 24/01895/FULL) for: new courtyard surface including walk-on rooflight; window and door alterations; new window to Mansfield Mews at second floor level; new rooflights; repairs to roof and external brickwork; erection of new staircase in front area lightwell; partial infill of rear lightwell at ground floor level; erection of roof terrace; installation of PV panels at roof level; and associated works namely; to allow provision of guarding system to provide safe access for maintenance across the roof; alteration at south elevation omitting window SFW11 from the new WC, remove the existing RWP from the internal courtyard corner, removal of the existing plastic section of a redundant vent pipe at lower level and retain original lead; new cast iron rain water pipes at west elevation; and internal layout alterations at basement, ground, 2nd, 3rd floors. (Linked with 26/04876/LBC)
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26/04870/NMA Awaiting decision
34 Park Street London W1K 2JD
Amendments to planning permission dated 8 May 2026 (25/07808/FULL) for general refurbishment and M&E upgrade of the office building namely; roof walkable skylight, GF meeting room wall mounted TV, garden bench and planters, fire lobbies, L4 glass partition, reception to hall door swing change, front lightwell electric cupboard change, wall panelling on LGF and L5, LGF modular screen, LGF courtyard window door infill, and LGF cove lighting.
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26/04816/NMA Awaiting decision
Ebury Bridge Estate Ebury Bridge Road London SW1W 8PX
Amendments to planning permission dated 21 July 2023 (RN:23/00331/COOUT) for a mixed use development in outline for residential floorspace and ancillary residential facilities (Class C3) non-residential floorspace comprising flexible retail (Classes A1 - A4), community (Class D1), leisure (Class D2) and workspace (Class B1) floorspace; provision of basement; new pedestrian and vehicular access; and associated amenity space, open space, plant, landscaping, car and cycle parking, refuse storage, servicing area, and other associated infrastructure works; and detailed planning consent for Blocks 7 and 8 comprising residential floorspace and ancillary residential facilities (Class C3); provision of a basement; new pedestrian and vehicular access; and associated amenity space landscaping, car and cycle parking, refuse storage, servicing area, and other associated infrastructure works, namely amendments to the approved Masterplan Phasing to incorporate enabling works and piling in Phase 2a and 3a.
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26/04751/NMA Awaiting decision
98 Inverness Terrace London W2 3LD
Amendments to planning permission dated 16 November 2021 (RN: 21/06656/FULL) for the: External repair works to the front elevation of the building; provision of new York stone paving to the existing entrance steps and the addition of a gate to the basement railings; and associated works. NAMELY, to allow external repair works to the front elevation of the building; change of paving to front entrance steps from Yorkstone to Sandstone; addition of a gate to the basement railings; and replacement of existing timber doors to the refuse store with metal doors. (Linked with 26/04750/LBC)