63 Blandford Street London W1U 7HR
Proposal
Variation of Condition 1 of planning permission dated 3rd November 2025 (25/04449/FULL) for: Erection of mansard roof extension with three new front dormers, two rear dormers (one dormer window and one dormer door), raising height of chimney by 330mm, installation of 6 over 6 pane slimline double glazed timber sash windows, installation of photovoltaic panels at roof level. NAMELY, to allow raising of the chimney stack to retain the same height relationship to the roof; formation of a brick party wall; provision of dormer windows to match neighbouring dormer profiles; alteration of the rear dormers to casement doors; and alteration to the proposed stair to the fourth floor.
- Received
- 8 September 2026
- Public comments
- 0 · last counted 6 October 2026
- Council
- City of Westminster
- ReceivedSubmitted8 Sep
- ValidatedValidated8 Sep
- Consult.Consultation
- TargetTarget Date
- DecidedDecided
This is a planning application for a dormer extension at 63 Blandford Street London W1U 7HR. Westminster has handled 26,489 applications of this type and approves 88% of them, typically deciding them in 54 days. It was submitted on 8 September 2026 and is still awaiting a decision. The site is in the Portman Estate conservation area, with 14 listed buildings nearby. There have been 2 other applications at this address. We hold 1,036 applications in total for the W1U postcode area.
Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Associated applications
- 20268 Sep
Variation of Condition 1 of planning permission dated 3rd November 2025 (25/04449/FULL
This applicationPendingVariation of conditions (s73)26/04651/FULL - 202628 Jul
Details of written photographic specification of the materials; exterior of the new extension; new windows…
ApprovedDischarge of conditions26/05078/ADFULL - 20255 Aug
Erection of mansard roof extension with three new front dormers, two rear dormers (one dormer window and one…
ApprovedListed building consentPart of25/04449/FULL - 20255 Aug
Erection of mansard roof extension with three new front dormers, one dormer window (replace existing) and one…
ApprovedListed building consentRelated25/04450/LBC
Planning history at this site
3 other applications at this property, newest first.
- 20268 Sep
Variation of 25/04450/LBC
PendingListed building consent26/06137/LBC - 20255 Aug
Erection of mono-pitched and sheer roof extension to rear with two sash windows and a single timber door to…
ApprovedListed building consent25/04452/LBC - 20255 Aug
Erection of mono-pitched and sheer roof extension to rear with two sash windows and a single timber door to…
ApprovedListed building consent25/04451/FULL
Planning constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Portman Estate
- Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
- 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 2026-10-09. 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.
Before the decision
You may need a heritage statement. Heritage & archaeology consultants near this site
A listed building is on or next to this site.
- 0.2 miLONDONRTPI
- 0.4 miLondonRTPIRICS Regulated
- 0.5 miLondonRTPI
Nearest first, within 25 miles of the site. Every firm is listed free.
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