12 Denbigh Street London SW1V 2ER
Approved on 20 March 2026
Council decision: Application PermittedDelegated (officer decision)
Proposal
Erection of mansard roof extension and alterations to the front and rear elevations including changes to the windows and to rear closet wing.
- Received
- 16 December 2025
- Decision level
- Delegated (officer decision)
- Council
- City of Westminster
- Ward
- Pimlico North
- Agent
- The Plannery Ltd
- ReceivedReceived16 Dec
- ValidatedValidated16 Dec
- Consult.Consultation
- TargetTarget Date10 Feb
- DecidedDecided20 Mar
Decided in 94 days (council typically 49)
About this application
This is a full planning application for an extension at 12 Denbigh Street London SW1V 2ER. Westminster has handled 4,484 applications of this type. This one was decided in 94 days, 6 weeks longer than Westminster's typical decision time. The site is in the Pimlico conservation area, with 2 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 72 applications across Pimlico North. We hold 1,120 applications in total for the SW1V postcode area.
86% of full applications at City of Westminster were approved. Across all application types, the council typically decides in about 7 weeks (median).
Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street
Application details
- Postcode
- SW1V 2ER
- Application type
- Full Planning Permission Application
- Scale / size
- Small
Planning application dates
- Date validated
- 16 December 2025
- Consultation expiry
- 18 March 2026
- Target decision date
- 10 February 2026
Applicant and agent
- Agent
- The Plannery Ltd
- Architect profile
- THE PLANNERY LIMITED
- Agent address
- The Plannery Ltd Tallboys 15 Courts Hill Road GU27 2NG United Kingdom
Planning decision
- Statutory period
- 56 days
Publicity
- Last advertised
- 25 February 2026
- Advertisement expiry
- 18 March 2026
Site constraints
Designations that overlap or adjoin the site outline.
- Flood zone 3: High probability (rivers and sea)
- Conservation area: Pimlico
- Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
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
- 202614 Oct
Samples of facing materials you will use, including glazing, and elevations and roof plans. Detailed of new…
ApprovedDischarge of conditions26/07028/ADFULL - 202516 Dec
Erection of mansard roof extension and alterations to the front and rear elevations including changes to the…
This applicationApprovedFull25/09106/FULL
Planning history at this site
1 other application at this property, newest first.
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
- 12 Denbigh Street London SW1V 2ER17/05742/FULL · FullApproved0.0 mi
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- First Floor 26 - 28 Warwick Way London SW1V 1RX24/06220/FULL · FullAwaiting decision0.0 mi
- 26 - 28 Warwick Way London SW1V 1RX24/00782/ADV · AdvertisingApproved0.0 mi
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For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Avent Roofing ServicesVerifiedWestminsterRoofing1.2 mi
- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman2.2 mi
- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering3.7 mi
- Orient Construction Consultancy LimitedVerifiedLondon4.8 mi
Planning something similar?
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