Basement And Ground Floor 38 Montagu Square London W1H 2LL

26/01422/LBCListed Building Consent ApplicationApproved

Discharge / amendments

Approved on 19 June 2026

Site boundary (council red line)

Proposal

Variation of condition 4(b) of listed building consent dated 28 December 2023 (RN 23/07347/LBC) for the demolition of existing roof and erection of a mansard roof extension at first floor level and alterations to the front and rear of the portion of the building fronting onto Bryanston Mews East. Subdivision and reconfiguration of existing ground and lower ground floor levels of the building and together with the new first floor extension to the mews portion of the building, create two self-contained residential units (Class C3) and associated external alterations. Lowering of front pavement vault [Site includes 22 Bryanston Mews East] (Linked with 23/07346/FULL) NAMELY, to replace the wording of "conservation rooflights" with "low profile horizontal rooflights". (Linked to 26/00837/FULL)

Received: 10 February 2026
Council: City of Westminster
Ward: Marylebone
Agent: Peek Architecture Ltd

ReceivedReceived10 Feb
ValidatedValidated10 Feb
Consult.Consultation
TargetTarget Date7 Apr
DecidedDecided19 Jun

Decided in 129 days (council typically 49)

About this application

This is a heritage application for demolition at Basement And Ground Floor 38 Montagu Square London W1H 2LL. Westminster has handled 2,677 applications of this type. This one was decided in 129 days, 11 weeks longer than Westminster's typical decision time. The site is in the Portman Estate conservation area, with 20 listed buildings nearby. There have been 8 other applications at this address. In the past year there have been 171 applications across Marylebone. We hold 896 applications in total for the W1H 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: W1H 2LL
Application type: Listed Building Consent Application
Scale / size: Small

Planning application dates

Date validated: 10 February 2026
Consultation expiry: 29 April 2026
Target decision date: 7 April 2026

Applicant and agent

Agent: Peek Architecture Ltd
Agent address: 9 Lauderdale Parade Maida Vale London W9 1LU

Planning decision

Statutory period: 56 days

Publicity

Last advertised: 8 April 2026
Advertisement expiry: 29 April 2026
Site notice start: 30 March 2026
Site notice end: 20 April 2026

Additional information

Comments: 0
Documents: 6

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: 37-39, Montagu Square W1On this site · +4 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
11 Feb
Variation of Condition 1 and alteration to the wording of Conditions 3 and 4 of planning permission dated 24…
ApprovedVariation of conditions (s73)Part of26/00837/FULL
2026
10 Feb
Variation of condition 4(b) of listed building consent dated 28 December 2023 (RN 23/07347/LBC
This applicationApprovedListed building consent26/01422/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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