Planning application
79 Chester Square London SW1W 9DU
Works: Extension Demolition
Decided. The decision notice on the council portal carries the outcome in full, including any conditions.
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
Application record
- Reference
- 26/04196/NMA
- Category
- Amendments
- Status
- Decided
- Received
- 25 Jun 2026
- Validated
- 25 Jun 2026
- Decided
- 24 Jul 2026
- Postcode
- SW1W 9DU
Site history
Applications at this address on the Westminster register
This site has had 7 applications since 2026.
-
26/05726/ADFULL Decided
79 Chester Square London SW1W 9DU
Details of a further noise report to confirm a fixed maximum noise level pursuant to condition 12 (part 3) of planning permission dated 05 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, including 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 Decided
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)
-
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)
-
26/02994/ADLBC 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 3 (part iii) of Listed Building Consent dated 11th January 2023 (RN 22/05928/LBC)
-
26/02991/ADFULL Awaiting decision
79 Chester Square London SW1W 9DU
Details of biodiversity management plan in relation to second floor green roof pursuant to condition 9 (partial) of planning permission dated 13 December 2022 (RN: 22/05927/FULL)
Timeline
Dates from the published record
-
25 Jun 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
24 Jul 2026
Decision issued
-
9 Aug 2026
Status changed to Decided
Previously Pending.
Related applications
Cases linked to this one on the register
1 later application on the register refers to this one:
-
26/04198/LBC Awaiting decision
79 Chester Square London SW1W 9DU
Reconfiguration of the approved photovoltaic array, including 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)
After the decision
Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.
About amendment applications
An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
79 Chester Square London SW1W 9DU
89% historically approved · decision due ~15 Oct
Details of a further noise report to confirm a fixed maximum noise level pursuant to condition 12 (part 3) of planning permission dated 05 January 2023 (RN: 22/05927/FULL).
Decided -
79 Chester Square London SW1W 9DU
90% historically approved · decision due ~20 Aug
Reconfiguration of the approved photovoltaic array, including 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)
Awaiting decision Heritage and listed buildings -
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)
Decided -
78 Chester Square London SW1W 9DU
89% historically approved · decision due ~13 Jul
detailed drawings (sections and elevations at a scale of 1:10 and/or 1:20) of the new windows and doors (to be annotated to correspond to rooms and floor level) and detailed drawings of section drawing (scale of 1:10) through the mansard showing the dormer window and shoulder of the mansard (see informative 3) pursuant to condition 3 (A), 6 of listed building dated 17th May 2024 (RN:24/00173/LBC)
Awaiting decision Conditions Loft or dormer Windows or glazing 9 docs -
79 Chester Square London SW1W 9DU
89% historically approved · decision due ~2 Jul
Details of new interior, which must be appropriate to the period of the building and their location; pursuant to condition 3 (part iii) of Listed Building Consent dated 11th January 2023 (RN 22/05928/LBC)
Awaiting decision Conditions 4 docs -
79 Chester Square London SW1W 9DU
88% historically approved · decision due ~1 Jul
Details of biodiversity management plan in relation to second floor green roof pursuant to condition 9 (partial) of planning permission dated 13 December 2022 (RN: 22/05927/FULL)
Awaiting decision Full applications 9 docs
Other amendment applications
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26/07389/NMA Awaiting decision
Flat 1 5 Grittleton Road London W9 2DD
Amendments to planning permission dated 04 June 2025 (RN: 25/02022/FULL), NAMELY, amendment of Condition 4 to correct the property address from 9 Aldridge Road Villas to 5 Grittleton Road.
-
26/07312/NMA Awaiting decision
15 Rodmarton Street London W1U 8BL
Amendment to planning permission dated 5 May 2026 (26/00539/FULL) for: Erection of a single storey conservatory at rear ground floor level, use of the garage as internal living accommodation and installation of a new skylight at main roof level namely, to allow a reduction in the size of the rear orangery and alterations to its roof arrangement.
-
26/07317/NMA Awaiting decision
42 - 44 Beak Street London W1F 9RH
Amendments to planning permission dated 28 October 2025 (25/06226/FULL) for: Installation of a replacement entrance door and the formation of an additional new entrance at ground floor level; associated alterations to the ground floor facade and the installation of plant and related mechanical equipment at roof level namely, paint colour and lighting.
-
26/07281/NMA Awaiting decision
Brymon Court 31 - 32 Montagu Square London W1H 2LH
Amendments to planning permission dated 6 May 2026 (25/07520/FULL) for: Replacement of windows to the front, side and rear elevations with aluminium framed windows namely, to include the replacement of five doors.
-
26/07243/NMA Awaiting decision
144 Praed Street London W2 1HU
Amendments to planning permission dated 09 August 2024 (RN: 22/08247/FULL) for the replacement of the mansard roof with a sheer brickwork extension, new mansard roof extension and rooftop plant enclosure to provide additional hotel accommodation (Class C1); alterations to facade fenestration and shopfronts; installation of a green wall to the side (north-east); and associated works. NAMELY, to amend Condition 13 to require details of the modular green wall to be submitted prior to commencement of the relevant part of the development.