Planning application
6 Seymour Mews London W1H 6BE
Works: Extension Windows or glazing Domestic
Read from the description, not a valuation. How we read the register
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Amendments to planning permission dated 5th September 2024 (RN: 24/02777/FULL) for External alterations, extension at ground floor, excavation to provide new basement, and the installation of an air source heat pump; all to enlarge and alter dwellinghouse (Class C3) namely; to alter the colours of the front ground floor facade elements (the main entrance door, garage door, windows, and rendered lintel).
As published by the council, reference 25/09319/NMA
Application record
- Reference
- 25/09319/NMA
- Type
- Non-material amendments
- Status
- Decided
- Decision
- Granted As published: Application Permitted
- Received
- 23 Dec 2025
- Validated
- 23 Dec 2025
- Decided
- 3 Mar 2026
- Ward
- Marylebone
- Decision by
- Delegated Decision
- Postcode
- W1H 6BE
Site history
Applications at this address on the Westminster register
This site has had 2 applications since 2025: 2 approved, 0 refused.
-
25/04662/ADFULL Granted
6 Seymour Mews London W1H 6BE
Details of Code of Construction Practice pursuant to Condition 3 of planning permission dated 05 September 2024 (RN24/02777/FULL)
Timeline
Dates from the published record
-
23 Dec 2025
Received by Westminster
-
3 Mar 2026
Decision issued: Application Permitted
-
20 Jul 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
TEO architects Agent, an architecture practice registered in London
Active · incorporated 2016 · London
12 applications on PlanIndex · across 6 councils · 82% granted
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See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
9 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.
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Open the documentsWhat this grant of permission means
Westminster granted permission on 3 March 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. 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
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9 Seymour Mews London W1H 6BE
Replacement of existing single glazed timber windows with new double glazed windows.
Granted Full applications Windows or glazing 8 docs -
11 Seymour Mews London W1H 6BE
Substantial demolition behind retained facades.
Granted Heritage and listed buildings Demolition 3 docs -
11 Seymour Mews London W1H 6BE
i) External alterations in connection with use of No. 11 as a 2x bedroom house.ii) Demolition behind retained facade of Nos. 15 and 16 to be used for office purposes. (Part of a use swap with 18 and 20 Seymour Place)
Granted Full applications Demolition 17 docs -
6 Seymour Mews London W1H 6BE
Details of Code of Construction Practice pursuant to Condition 3 of planning permission dated 05 September 2024 (RN24/02777/FULL)
Granted Full applications 9 docs -
11 Seymour Mews London W1H 6BE
Demolition of internal partitions, internal staircases in No. 11 and internal party wall of Nos. 15 and 16. Removal of internal fabric to create large open plan area for Nos. 15-16. Refurbishment of roof structure to Nos. 15 and 16.
Withdrawn Heritage and listed buildings Demolition 4 docs -
11 Seymour Mews London W1H 6BE
External alterations to 11, 15 and 16 Seymour Mews to provide residential (1x2 bed maisonette) and office (Class B1) accommodation.
Withdrawn Full applications 15 docs
Other amendment applications
In Westminster
-
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.
-
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.
-
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.
-
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.
-
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)