Basement And Ground Floor 38 Montagu Square London W1H 2LL
Approved on 19 June 2026
Council decision: Application Permitted
Proposal
Variation of Condition 1 and alteration to the wording of Conditions 3 and 4 of planning permission dated 24 February 2025 (Ref: 24/07664/FULL) for, 'Demolition of existing roof and erection of a mansard roof extension at first floor level and alterations to the front and rear of the portion of the building fronting onto Bryanston Mews East. Subdivision and reconfiguration of existing ground and lower ground floor levels of the building and together with the new first floor extension to the mews portion of the building, create two self-contained residential units (Class C3) and associated external alterations. Lowering of front pavement vault' [Site includes 22 Bryanston Mews East]; Namely: substitute approved drawings to allow revised rooflight design, negating the requirement to provide detail of the roof light and to allow the external glazing of the rooflight to be clear, with opaque glazing provided to the internal face. (Application under Section 73)
- Received
- 11 February 2026
- Council
- City of Westminster
- ReceivedReceived11 Feb
- ValidatedValidated11 Feb
- Consult.Consultation
- TargetTarget Date
- DecidedDecided19 Jun
Decided in 128 days
About this application
This is a planning application for demolition at Basement And Ground Floor 38 Montagu Square London W1H 2LL. Westminster has handled 27,078 applications of this type. This one was decided in 128 days, 11 weeks longer than Westminster's typical decision time. The site is in the Portman Estate conservation area, with 20 listed buildings nearby. There have been 8 other applications at this address. We hold 896 applications in total for the W1H postcode area.
Application details
- Postcode
- W1H 2LL
Planning application dates
- Date validated
- 11 February 2026
Site constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Portman Estate
- Article 4 direction: Article 4 Basement Development Permitted Rights Removed
- Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (21)
flood storage areas, tree preservation orders, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.
A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.
Data © Crown copyright and others · sources and licences
Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.
© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.
© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.
© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.
Contains Ordnance Survey data © Crown copyright and database right 2026.
Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.
Associated applications
- 202611 Feb
Variation of Condition 1 and alteration to the wording of Conditions 3 and 4 of planning permission dated 24…
This applicationApprovedVariation of conditions (s73)26/00837/FULL - 20246 Nov
Internal alterations to ground and first floor.
PendingListed building consentFiled alongside24/07759/LBC - 20241 Nov
Variation of Condition 1 of planning permission dated 28th December 2023 (RN: 23/07346/FULL
PendingVariation of conditions (s73)Part of24/07664/FULL
Planning history at this site
6 other applications at this property, newest first.
- 202610 Feb
Variation of condition 4(b) of listed building consent dated 28 December 2023 (RN 23/07347/LBC
ApprovedListed building consent26/01422/LBC - 202512 Dec
Details of the new rooflights, demonstrating that these are conservation rooflights pursuant to condition 4…
RefusedDischarge of conditions25/09024/ADFULL - 202524 Jan
Details of new external doors sections and elevations, new rooflights demonstrating that these are…
ApprovedDischarge of conditions25/00478/ADLBC - 202524 Jan
Details of the new external doors (sections and elevations at 1:5 and 1:10), new rooflight/s (1:5, 1:10, 1:20…
ApprovedDischarge of conditions25/00477/ADFULL - 20247 Oct
Details of new external doors, new rooflight/s, new windows, mansard construction details, new double doors…
PendingListed building consent24/06999/ADLBC - 20244 Oct
Details of new external doors (sections and elevations at 1:5 and 1:10), new rooflight/s (1:5, 1:10, 1:20 as…
PendingDischarge of conditions24/06962/ADFULL
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Around this site
Nearby applications
- Basement And Ground Floor 38 Montagu Square London W1H 2LL26/01422/LBC · HeritageApproved0.0 mi
- Basement And Ground Floor 38 Montagu Square London W1H 2LL24/07664/FULL · FullAwaiting decision0.0 mi
- Basement And Ground Floor 38 Montagu Square London W1H 2LL25/09024/ADFULL · ConditionsRefused0.0 mi
- Basement And Ground Floor 38 Montagu Square London W1H 2LL25/00478/ADLBC · ConditionsApproved0.0 mi
- Basement And Ground Floor 38 Montagu Square London W1H 2LL24/07759/LBC · HeritageAwaiting decision0.0 mi
For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman0.9 mi
- Avent Roofing ServicesVerifiedWestminsterRoofing1.1 mi
- Orient Construction Consultancy LimitedVerifiedLondon4.3 mi
- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering5.7 mi
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