78 Chiltern Street London W1U 5AE

09/08338/FULLApplication for full Planning PermissionApproved

Full

Approved on 9 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

Alterations to openings on rear and side facades including installation of new timber windows.

Received: 16 October 2009
Decision level: Delegated (officer decision)
Public comments: 1
Council: City of Westminster
Ward: Marylebone High Street
Agent: Neil Wilson Architects Limited

ReceivedReceived16 Oct
ValidatedValidated16 Oct
Consult.Consultation
TargetTarget Date11 Dec
DecidedDecided9 Dec

Decided in 54 days (council typically 49)

About this application

This is a full planning application for window replacement at 78 Chiltern Street London W1U 5AE. Westminster has handled 4,484 applications of this type. This one was decided in 54 days, 5 days longer than Westminster's typical decision time. The site is in the Portman Estate conservation area, with 2 listed buildings nearby. There have been 8 other applications at this address. We hold 1,070 applications in total for the W1U 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: W1U 5AE
Application type: Application for full Planning Permission
Scale / size: Small

Planning application dates

Date validated: 16 October 2009
Consultation expiry: 27 November 2009
Target decision date: 11 December 2009
Committee meeting: 9 December 2009

Applicant and agent

Agent: Neil Wilson Architects Limited
Architect profile: NEIL WILSON ARCHITECTS LIMITED
Agent address: 37 Montagu Square London W1H 2LL

Planning decision

Statutory period: 56 days

Publicity

Last advertised: 6 November 2009
Advertisement expiry: 27 November 2009
Site notice start: 26 October 2009
Site notice end: 16 November 2009

Additional information

Planning Portal ID: PP-00848998
Documents: 13

Site constraints

Checking the site

2/3

Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Conservation area: Portman EstatePart of the site
Listed building: Grade II: 78, Chiltern StreetOn this site
Article 4 direction: Article 4 Basement Development Permitted Rights Removed
Brownfield land register: Luxborough Towers, Luxborough Street, London, W1U 5BFRegister site at or near this address
Flood zone 1: Low probability (rivers and sea)

Also checked, none recorded (20)

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 and heritage coasts.

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.

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

2009
16 Oct
Alterations to openings on rear and side facades including installation of new timber windows.
This applicationApprovedFull09/08338/FULL
2009
16 Oct
Internal alterations at ground and second floor level. Reopening of rear elevation blocked up windows and…
ApprovedListed building consentFiled alongside09/08339/LBC

Planning history at this site

7 other applications 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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