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.
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26/05726/ADFULL Awaiting decision
79 Chester Square London SW1W 9DU
Details of a further noise report pursuant to condition 12 (part 3) of planning permission dated 5th January 2023 (RN: 22/05927/FULL)
-
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 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)
-
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 500 metres
-
79 Chester Square London SW1W 9DU
89% historically approved · decision due ~15 Oct
Details of a further noise report pursuant to condition 12 (part 3) of planning permission dated 5th January 2023 (RN: 22/05927/FULL)
Awaiting decision -
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
89% historically approved · decision due ~20 Aug
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)
Awaiting decision -
78 Chester Square London SW1W 9DU
91% 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
91% 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
87% 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
In Westminster
-
26/06201/NMA Awaiting decision
Almack House 28 King Street St James's London SW1Y 6QW
Amendments to planning permission dated 16th April 2026 (RN:26/01487/FULL) for Installation of a mechanical plant at lower ground floor and installation of two grilles to two lower ground floor windows. Namely, addition of window top grille
-
26/06212/NMA Awaiting decision
10 - 11 Lancaster Gate London W2 3LH
Amendment to Condition 12 (Whole Life Carbon) of planning permission dated 19th April 2024 (RN 23/04044/FULL) for Change of use from hotel to residential use (Class C3) with associated internal alterations to create 11 new units and external alterations comprising reconfiguration and recladding of the rear extension and restoration of the existing building. Namely to include additional requirement to evidence and justify where benchmarks cannot be achieved, consider mitigation measures and if none, evidence that all mitigation measures have been exhausted. (Linked with RN 26/06213/ADFULL)
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26/06211/NMA Awaiting decision
15 Portland Place London W1B 1PT
Amendments to planning permission dated 21th July 2022 (RN:22/03521/FULL) for Variation of condition 5 of planning permission dated 11th April 2018 (17/10815/FULL) for the Use of the building for a temporary period of 20 years as a medical use (Use Class D1) personal to OM Tower LLP. Namely, to amend condition 3.
-
26/06199/NMA Awaiting decision
33 - 35 Praed Street London W2 1NR
Amendments to planning permission dated 24th Septmebr 2024 (RN:24/03287/FULL) for Use of lower ground and ground floors as supermarket with ancillary bakery (Class E); Use of first, second and third floors as aparthotel with 19 bedrooms (Class C1); Installation of plant machinery and solar thermal panels at roof level, Replacement of windows; and associated external alterations. Namely, Introduction of two shawarma grill machines in the supermarket area at ground floor level; the introduction of a new canopy to provide ventilation for the two shawarma grill machines; and amendments to the ventilation design for the lower ground floor bakery canopy extract.
-
26/06160/NMA Awaiting decision
The Arcade Dolphin Square London SW1V 3LX
Amendments to planing permission dated 11 June 2025 (RN: 25/01157/FULL) for: Alterations to the ground floor of Rodney House including the shopping arcade, with the introduction of new shopfronts to the Chichester Street frontage; new entrances with accessible ramps for accessibility; and associated works. Namely, amendments to the treatment of the end bays of the Chichester Street elevation