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12 Thornton Place London W1H 1WB

09/08441/FULLApplication for full Planning PermissionApproved
Full

Approved on 8 December 2009

Council decision: Application PermittedDelegated (officer decision)

Approximate site (title boundary)
Boundary © HM Land Registry, © Ordnance Survey · details

This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.

Proposal

Demolition and replacement of existing mansard roof with raised parapet walls to the side and rear elevations with sheer elevation at rear second floor level. New dormer windows to the front elevation. New windows to the rear facade. (Variation to planning permission granted 28 September 2009)

Received
21 October 2009
Decision level
Delegated (officer decision)
Ward
Bryanston And Dorset Square
Agent
Cousins Wojciechowski Architects
  1. Received21 Oct
  2. Validated21 Oct
  3. Consult.
  4. Target16 Dec
  5. Decided8 Dec

Decided in 48 days (council typically 49)

About this application

This is a full planning application for demolition at 12 Thornton Place London W1H 1WB. Westminster has handled 4,484 applications of this type. This one was decided in 48 days. The site is in the Portman Estate conservation area, with 20 listed buildings nearby. There has been 1 other application at this address. We hold 896 applications in total for the W1H 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.See what's approved near your address

Application details

Postcode
W1H 1WB
Application type
Application for full Planning Permission
Scale / size
Small

Planning application dates

Date validated
21 October 2009
Consultation expiry
27 November 2009
Target decision date
16 December 2009
Committee meeting
8 December 2009

Applicant and agent

Agent
Cousins Wojciechowski Architects
Agent address
23-25 Eastcastle Street London W1W 8DF

Planning decision

Statutory period
56 days

Publicity

Last advertised
6 November 2009
Advertisement expiry
27 November 2009
Site notice start
30 October 2009
Site notice end
20 November 2009

Additional information

Planning Portal ID
PP-00859049
Comments
0
Documents
5

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Portman Estate
  • Listed building: Grade II: 42-50, York Street W1On or next to this site · +2 more
  • 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

  1. 2009
    21 Oct

    Demolition and replacement of existing mansard roof with raised parapet walls to the side and rear elevations…

    This applicationApprovedFull09/08441/FULL
  2. 2009
    21 Oct

    Demolition and replacement of existing mansard roof with raised parapet walls to the side and rear elevations…

    ApprovedConservation Area Consent Appl (CAC)Filed alongside09/08442/CAC

Source: Westminster

Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.

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