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78 Chiltern Street London W1U 5AE

07/08291/LBCListed Building Consent ApplicationApproved
Listed building consent

Approved on 31 October 2007

Council decision: Application PermittedDelegated (officer decision)

Approximate location: the centre of the postcode, not the exact property.

Proposal

Alterations during the course of construction for a scheme dated 02.05.2006 (RN: 06/00352) Extension to existing flats at 1st and 2nd floor level and erection of new 3rd and 4th floor to create 3 bed maisonette with rear terrace. Internal alterations to facilitate installation of lift and alterations to staircase; namely the erection of a wall to both basement flats to provide half hour protected escape route from the basement.

Received
20 September 2007
Decision level
Delegated (officer decision)
Ward
Marylebone High Street
  1. Received20 Sep
  2. Validated20 Sep
  3. Consult.
  4. Target14 Nov
  5. Decided31 Oct

Decided in 41 days (council typically 49)

About this application

This is a heritage application for an extension at 78 Chiltern Street London W1U 5AE. Westminster has handled 2,677 applications of this type. This one was decided in 41 days, 8 days quicker 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.

93% of heritage 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
Listed Building Consent Application
Scale / size
Small

Planning application dates

Date validated
20 September 2007
Target decision date
14 November 2007
Committee meeting
31 October 2007

Applicant and agent

Agent address
Unit 15 Grand Union Centre West Row London W10 5AS

Planning decision

Statutory period
55 days

Additional information

Planning Portal ID
PP-00289151
Comments
0
Documents
5

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations at the address point. Ones next to the site may also apply.

  • Conservation area: Portman Estate
  • Listed building: Grade II: 78, Chiltern StreetOn or next to this site
  • 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.

Planning history at this site

6 other applications at this property, newest first.

  1. 2010
    4 Jun

    Approval of details pursuant to Conditions 2 and 3 of listed building consent dated 09 December 2009 (RN…

    ApprovedDischarge of conditions10/04933/ADLBC
  2. 2010
    4 Jun

    Approval of details pursuant to Conditions 2 and 3 of planning permission dated 09 December 2009 (RN: 09/08338

    ApprovedDischarge of conditions10/04687/ADFULL
  3. 2009
    16 Oct

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

    ApprovedApplication for full Planning Permission09/08338/FULL
  4. 2009
    16 Oct

    Internal alterations at ground and second floor level. Reopening of rear elevation blocked up windows and…

    ApprovedListed building consent09/08339/LBC
  5. 2004
    11 Nov

    External alterations including the installation of a new access ramp leading from the ground floor courtyard…

    RefusedApplication for full Planning Permission04/08906/FULL
  6. 2004
    11 Nov

    Internal and external alterations including the installation of a new access ramp leading from the ground…

    ApprovedListed building consent04/08907/LBC

Source: Westminster

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

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