Planning application
1 Berkeley Mews London W1H 7AT
Works: Loft or dormer Demolition
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Amendments to planning permission dated 22nd May 2024 (RN 23/07126/FULL) for thePartial demolition behind partially retained facades, use of 2 Berkeley Mews as office accommodation (Class E) and amalgamation with existing office (class E) use at 1 Berkeley Mews, associated internal and external alterations, provision of external plant and repair works all in connection with a land use swap with 28 Dorset Street (RN: 23/07147/FULL). NAMELY, to add an additional access conservation rooflight to the rear pitch of the main roof on 2 Berkeley Mews.
As published by the council, reference 25/07954/NMA
Application record
- Reference
- 25/07954/NMA
- Type
- Non-material amendments
- Status
- Pending
- Received
- 3 Nov 2025
- Validated
- 3 Nov 2025
- Ward
- Marylebone
- Postcode
- W1H 7AT
Site history
Applications at this address on the Westminster register
This site has had 3 applications since 2025: 1 approved, 0 refused.
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26/05889/FULL Awaiting decision
1 Berkeley Mews London W1H 7AT
Installation of planters, outdoor furniture, projecting signage, wall-mounted lights and photocell, a post box, an intercom system and a CCTV to the front facade of 1 & 2 Berkeley Mews.
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25/06703/ADFULL Granted
1 Berkeley Mews London W1H 7AT
Details of new windows and doors pursuant to condition 9 of planning permission dated 22 May 2024 (RN: 23/07126/FULL).
Timeline
Dates from the published record
-
3 Nov 2025
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 29 December 2025, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Westminster took a median of 66 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Garnett Architecture LLP Agent, an architecture practice registered in London
Active · incorporated 2003 · London
21 applications on PlanIndex · 100% granted
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
7 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Watch members (£5 a month) open the document list from here.
Open the documentsWhat happens while it is decided
This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided amendment applications in a median of 54 days. More in our guide to how long planning decisions take.
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
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5 - 6 Berkeley Mews London W1H 7PB
Use of ground floor as offices, installation of new windows at ground floor level and replacement of windows at first floor level.
Granted Full applications Windows or glazing 15 docs -
5 - 6 Berkeley Mews London W1H 7PB
Use of ground floor of 6 Berkeley Mews as offices and alterations to front ground floor elevation including replacement of garage doors with new entrance doorway and windows.
Refused Full applications Windows or glazing 7 docs -
1 Berkeley Mews London W1H 7AT
87% historically approved · decision due ~22 Oct
Installation of planters, outdoor furniture, projecting signage, wall-mounted lights and photocell, a post box, an intercom system and a CCTV to the front facade of 1 & 2 Berkeley Mews.
Awaiting decision Full applications 14 docs -
14 Seymour Street London W1H 7HT
90% historically approved · decision due ~14 Sep
Replacement of the existing roof asphalt roof to the rear terrace of the ground floor flat with bitumen roofing felt including porcelain paving tiles on pedestals.
Decided Heritage and listed buildings 14 docs -
18 Seymour Street London W1H 7HU
90% historically approved · decision due ~2 Jul
Details of the repairs and upgrading of the rear oriel window pursuant to condition 5 of listed building consent dated 8th August 2023 (RN:23/02367).
Awaiting decision Conditions Windows or glazing 10 docs -
18 Seymour Street London W1H 7HU
89% historically approved · decision due ~24 Sep
Details of new vault doors pursuant to condition 3 of listed building consent dated 01 April 2026 (RN: 26/01486/LBC)
Decided
Other amendment applications
In Westminster
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26/06232/NMA Awaiting decision
37 Trevor Place London SW7 1LE
Amendments to planning permission dated 17th July 2026 (RN 26/03030/FULL) for the Alterations including enlargement of louvres and installation of new plant in basement; landscaping of roof terrace; second floor windows replaced with door sets; partial demolition at ground and first floor levels to create new lightwell and landscaped courtyard. NAMELY, addition of a free-standing sauna to the second-floor roof terrace.
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26/06256/NMA Awaiting decision
Queens Court Queensway London W2 4QN
Amendments to planning permission dated 21st May 2026 (RN:25/05013/FULL) for Variation of conditions 1, 3, 8, 9 and 17 of planning permission dated 11th May 2022 (RN 18/09765/FULL) for the Change of use of rear part of Queensway Market to Retail, Financial and Professional services, Office and Restaurant (within Class E) use and 5 residential units facing Princes Court, reconfiguration of retail units along Queensway including introduction of Retail uses at Nos.23 and 33 (current entrances to Queensway Market) and use of Nos.25 and 41-43 Queensway as Restaurant uses, installation of new shopfronts to Nos.23 to 43 Queensway 23-43, erection of infill extension to rear at ground floor level, erection of two new pavilion structures for Retail use and associated new hard and soft landscaping on land between Queens Court and Princes Court, installation of green roofs, rooflights and mechanical plant within enclosures to first floor level roofs between projecting rear wings of Queens Court installation of kitchen extract ducts to rear elevations, and associated cycle parking, waste storage, plant and other ancillary alterations ('Application 2'). Namely, to vary the hours of operation for the refrigeration plant controlled by condition 6.
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26/06251/NMA Awaiting decision
19 Cumberland Street London SW1V 4LS
Amendments to planning permission dated 20th March 2026 (RN:25/08960/FULL) for Lower ground floor rear infill extension with terrace above, replacement of rear first floor conservatory, new roof level rear single dormer with access to third floor roof terrace, alterations to windows and external refurbishment, namely the change of conservatory gable roof to a flat GRP roof.
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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 change to approved grille.
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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)