Rossetti House 106 - 110 Hallam Street London W1W 5HG Data via plota.co.uk
Proposal
Amendments to planning permission dated 24 January 2025 (RN: ) for, "Replace windows with double glazed windows, convert two windows to AOV's in Staircase 1, convert two windows to fixed louvres in Staircase 2, replace water tanks on the roof, new insulated flat roof and dry riser inlet cabinet to be located on the Hallam Street elevation"; NAMELY to move the dry riser cabinet on the Hallam Street elevation. Data via plota.co.uk
Application progress
Approved on 4 Sept 2026 · Delegated Decision · Last checked 5 Sept 2026
Documents 12
Decision & officer reports 2
Plans & drawings 5
Application forms 1
Associated applications 2
Part of
- AmendmentAmendments to planning permission dated 24 January 2025 (RN) for, "Replace windows with double…This application26/05425/NMA
Site constraints 10
Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.
Sales history 1
Last sold for £18,000,000 in March 2024. Other property, freehold.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
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Important details
- Council
- Westminster
- Application type
- Non-material amendments
- Postcode
- W1W 5HG
- Received
- 10 Aug 2026
- Validated
- 10 Aug 2026
- Ward
- West End
- Case officer
- Show
- Target decision
- 7 Sept 2026
- Decision
- Application Permitted
- Decision date
- 4 Sept 2026
- Decision level
- Delegated Decision
- Agent
- ARCHER ARCHITECTS
How this decision compares
Decided in 25 days from validation, 30 days faster than Westminster's median of 55 for extensions. Approved, as 88% of extensions here are.
Plota live figures for extensions decided by Westminster in the last twelve months, from validation. Westminster decision record →
Public comments
No public comments yet.
Last counted 5 Sept 2026
Consultation & key dates
- Alt. reference
- PP-15140577
- Planning Portal ref
- PP-15140577
- Env. assessment
- No
Historical activity at this location
26 previous applications on record - archival context, not part of the live application.
Previous applications at this address
Nearby activity
Westminster is slower than most councils at deciding householder applications, ranking #258 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Westminster is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.
Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
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Rossetti House 106 - 110 Hallam Street London W1W 5HG
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Referenced application
Council archive
Rossetti House 106 - 110 Hallam Street London W1W 5HG
Windows replacement (like for like) to flats, converting two existing windows to AOV's in Staircase 1, converting two existing windows to fixed louvres in staircase 2, replacement of the existing water tanks on the roof, new insulated flat roof and dry riser inlet cabinet to be located on the Hallam Street elevation.
- Received
- 6 Nov 2024
- Outcome
- Pending