Planning application
26/04196/NMA
79 Chester Square London SW1W 9DU
Proposal
Amendments to planning permission dated 5th January 2023 (RN:22/05927/FULL) for "Excavation of basement storey beneath main house, demolition and rebuilding of mews house at new height plus the addition of a lower ground floor storey, demolition and rebuilding of main roof plus addition of plant equipment, erection of extension for lift from basement to third floor level, demolition and replacement of interconnecting extension between main and mews house, use of roof of interconnecting extension as a roof terrace, increasing height of boundary shared with 78 Chester Square and other external alterations". NAMELY, amendment to allow the reconfiguration of the approved photovoltaic array (inlcuding changing approved array to one with a lower number of higher performing panels) and the consequent amendment to the wording of condition 10.
As published by the council, reference 26/04196/NMA
Timeline
Dates from the published record
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25 Jun 2026
Received by Westminster
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21 Jul 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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26/02993/ADFULL Awaiting decision
79 Chester Square London SW1W 9DU
Details of new interior, which must be appropriate to the period of the building and their location; pursuant to condition 5 (part iii) of planning permission dated 5th January 2023 (RN 22/05927/FULL)
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26/04198/LBC Awaiting decision
79 Chester Square London SW1W 9DU
Reconfiguration of the approved photovoltaic array, inlcuding changing approved array to one with a lower number of higher performing panels and changing the mounting system (Amendment of Listed Building Consent dated 11 January 2023 RN: 22/05928/LBC.) (Linked with 26/04196/NMA)
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26/04197/ADFULL Awaiting decision
79 Chester Square London SW1W 9DU
Detailed drawings and the manufacturers specification; of the photovoltaic panels that will be used on main roof and the roof of the mews building; pursuant condition 14 of Planning Permission dated 5th January 2023 (RN 22/05927/FULL)
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25/05160/TCA Granted
77 Chester Square London SW1W 9DY
1 x London plane T1: Cut back selected branches to suitable branch junctions to provide up to 2 m clearance from built structures. Remove advanced epicormic trunk growth. Tip thin small diameter branches only by 10 to 15% to leave an even canopy density. 1 x London plane T2: Tip thin regrowth from previous reduction points by 10 to 15% to leave an even canopy density (small diameter branches only). 1 x London plane T3: Crown lift by two metres. Cut back selected branches to suitable branch junctions to provide up to 2 m clearance from built structures. Crown thin small diameter branches only by 10 to 15% to leave an even canopy density. 1 x London plane T4: Crown lift by two metres. Cut back selected branches to suitable branch junctions to provide up to 2 m clearance from built structures. Crown thin small diameter branches only by 10 to 15% to leave an even canopy density. 1 x London plane T5: Remove branch overhanging garden and emanating from trunk at about 10m above ground level. Crown lift by two metres. Cut back selected branches to suitable branch junctions to provide up to 2 m clearance from built structures. Crown thin small diameter branches only by 10 to 15% to leave an even canopy density. 1 x evergreen Magnolia T6: Reduce height and lateral spread over garden by up to 1m to create a more compact and conical shape. Prune back selected branches from elevation of house to create clearance of up to 0.5m.
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26/03240/ADLBC Awaiting decision
3 Chester Square Mews London SW1W 9DS
Detailed drawings of construction and window details of the new dormers to the mews; new garage doors; and New window and door to the ground floor mews elevation pursuant to conditon 4, a, b, c of listed building consent dated 22nd January 2025 (RN 24/08101/LBC)
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26/03261/ADFULL Awaiting decision
3 Chester Square Mews London SW1W 9DS
Details showing the provision of electric vehicle charging facilities, available for use within the garage, detailed drawings (elevations and sections at a scale of 1:10 or 1:20) of the construction and window details of the new dormers to the mews, new garage doors and new window and door to the ground floor mews elevation and details of how waste is to be stored on site and how materials for recycling will be stored separately pursuant to condition 4, 8 and 9 of planning permission dated 23rd January 2025 (RN:24/08100/FULL)
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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26/04951/NMA Awaiting decision
43 - 45 Portman Square London W1H 6LY
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.
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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.