Basement And Ground Floor 38 Montagu Square London W1H 2LL

25/00478/ADLBCApproval of Details (ADLBC)Approved

Discharge / amendments

Approved on 11 February 2025

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

Details of new external doors sections and elevations, new rooflights demonstrating that these are conservation rooflights, new windows, including the new windows and panelled stallriser to mews, mansard construction details demonstrating that the external height and extent of the mansard does not exceed that shown on the submitted application drawings and a revised more traditional detailed design for the mews entrance door and additional details of the fire suppression system proposed in the mews building, including revised drawings showing proposed locations for fixtures and fittings and indicative services routes and their relationship to retained fabric and details of any new service routes and/or connections for the system in the main house pursuant to Conditions 4 and 5 of listed building dated 28th December 2023 (RN:23/07347/LBC)

Received: 24 January 2025
Council: City of Westminster
Ward: Marylebone
Agent: Peek Architecture Ltd

ReceivedReceived24 Jan
ValidatedValidated24 Jan
Consult.Consultation
TargetTarget Date21 Mar
DecidedDecided11 Feb

Decided in 18 days (council typically 49)

About this application

This is an application to discharge conditions at Basement And Ground Floor 38 Montagu Square London W1H 2LL. Westminster has handled 3,063 applications of this type. This one was decided in 18 days, 4 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 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.

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.See what's approved near your address

Application details

Postcode: W1H 2LL
Application type: Approval of Details (ADLBC)
Scale / size: Small

Planning application dates

Date validated: 24 January 2025
Target decision date: 21 March 2025

Applicant and agent

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

Planning decision

Statutory period: 56 days

Additional information

Planning Portal ID: PP-13722305
Comments: 0
Documents: 15

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

2025
24 Jan
Details of the new external doors (sections and elevations at 1:5 and 1:10), new rooflight/s (1:5, 1:10, 1:20…
ApprovedDischarge of conditionsFiled alongside25/00477/ADFULL
2025
24 Jan
Details of new external doors sections and elevations, new rooflights demonstrating that these are…
This applicationApprovedDischarge of conditions25/00478/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.

Track this application

Get email alerts when there is a planning decision or status change.

Get email alerts near W1H

New planning applications delivered to your inbox daily.

Around this site

Nearby applications

Discuss this application on r/PlanningPermissionUK

For applicants and trades

Contractors near this project

Find contractors for loft conversions near this site

View all contractors

What's been approved on your street?

See what the council approved and refused near this address for the project you have in mind, and the rules that apply here.

Get The Signal Report