21 Upper Montagu Street London W1H 2PQ

25/04959/ADLBCApproval of Details (ADLBC)Approved

Discharge / amendments

Approved on 28 July 2025

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

Detailed drawings of roof, showing detail of natural slate which must be natural Welsh slate, dormer windows which must be double hung timber sash windows including details of glazing which must be slim line double glazing (14-16mm overall thickness) with integrated glazing bars, with no trickle vent and details of lead work pursuant to Condition 3 of listed building consent dated 27th June 2025 (RN:25/00195).

Received: 17 July 2025
Decision level: Delegated (officer decision)
Council: City of Westminster
Ward: Marylebone
Agent: Studio Hale

ReceivedReceived17 Jul
ValidatedValidated17 Jul
Consult.Consultation
TargetTarget Date11 Sep
DecidedDecided28 Jul

Decided in 11 days (council typically 49)

About this application

This is an application to discharge conditions at 21 Upper Montagu Street London W1H 2PQ. Westminster has handled 3,063 applications of this type. This one was decided in 11 days, 5 weeks quicker than Westminster's typical decision time. The site is in the Portman Estate conservation area, with 20 listed buildings nearby. There have been 6 other applications at this address. In the past year there have been 168 applications across Marylebone. We hold 896 applications in total for the W1H postcode area.

92% of conditions 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: W1H 2PQ
Application type: Approval of Details (ADLBC)
Scale / size: Small

Planning application dates

Date validated: 17 July 2025
Target decision date: 11 September 2025

Applicant and agent

Agent: Studio Hale
Architect profile: STUDIO HALE LIMITED
Agent address: 26 Princethorpe House London W2 5SU United Kingdom

Planning decision

Statutory period: 56 days

Additional information

Planning Portal ID: PP-14184085
Comments: 0
Documents: 10

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: 105A, CRAWFORD STREET W1 (See details for further address information)On this site · +1 more
Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
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

2025
17 Jul
Details of roof, showing detail of natural slate, dormer windows and details of lead work pursuant to…
ApprovedDischarge of conditionsFiled alongside25/04958/ADFULL
2025
17 Jul
Detailed drawings of roof, showing detail of natural slate which must be natural Welsh slate, dormer windows…
This applicationApprovedListed building consent25/04959/ADLBC

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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