17 Hertford Street London W1J 7RS

26/02818/LBCListed Building Consent ApplicationWithdrawn

Listed building consent

Withdrawn on 23 July 2026

Site boundary (council red line)

Proposal

Replacement of non-original casement windows at Level 03 with timber sash windows; new structure for mansard extension, infill of existing lightwell and repositioning of skylight above stairwell. [Linked to 26/02817/FULL]

Received: 28 April 2026
Council: City of Westminster
Ward: West End

ReceivedReceived28 Apr
ValidatedValidated28 Apr
Consult.Consultation
TargetTarget Date23 Jun
DecidedDecided23 Jul

Decided in 86 days (council typically 49)

About this application

This is a heritage application for an extension at 17 Hertford Street London W1J 7RS. Westminster has handled 2,677 applications of this type. It was withdrawn 86 days after it was submitted, before a decision was made. The site is in the Mayfair conservation area, with 16 listed buildings nearby. There have been 8 other applications at this address. In the past year there have been 484 applications across West End. We hold 940 applications in total for the W1J 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.See what's approved near your address

Application details

Postcode: W1J 7RS
Application type: Listed Building Consent Application
Scale / size: Small

Planning application dates

Date validated: 28 April 2026
Target decision date: 23 June 2026

Applicant and agent

Agent: Arya Douge
Architect profile: ARYA DOUGE LTD
Agent address: Radiant House, 2nd Floor, 36-38 Mortimer Street London London W1W 7RG United Kingdom

Planning decision

Statutory period: 56 days

Additional information

Planning Portal ID: PP-14886003
Comments: 0
Documents: 1

Site constraints

Checking the site

2/3

Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Conservation area: Mayfair
Listed building: Grade II: 17, Hertford Street W1On this site · +3 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.

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

2026
28 Apr
Replacement of non-original casement windows at Level 03 with timber sash windows; new structure for mansard…
WithdrawnFull Planning Permission ApplicationPart of26/02817/FULL
2026
28 Apr
Replacement of non-original casement windows at Level 03 with timber sash windows; new structure for mansard…
This applicationWithdrawnListed building consent26/02818/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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