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8 Montagu Square London W1H 2LB

26/01123/LBCListed Building Consent ApplicationApproved
Listed building consent

Approved on 19 May 2026

Site boundary (council red line)

Proposal

Refurbishment works to the main roof including new roof slates, tapered lead valley gutters and new lead roof covering to existing dormer and refurbishment of lead box gutter on the rear elevation.

Received
23 February 2026
Ward
Marylebone
Agent
MDB Associates
  1. Received23 Feb
  2. Validated25 Mar
  3. Consult.
  4. Target20 May
  5. Decided19 May

Decided in 55 days (council typically 49)

About this application

This is a heritage application for a dormer extension at 8 Montagu Square London W1H 2LB. Westminster has handled 2,677 applications of this type. This one was decided in 85 days, 5 weeks longer than Westminster's typical decision time. The site is in the Portman Estate conservation area, with 17 listed buildings nearby. There are no previous applications recorded 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 2LB
Application type
Listed Building Consent Application
Scale / size
Small

Planning application dates

Date validated
25 March 2026
Consultation expiry
13 May 2026
Target decision date
20 May 2026

Applicant and agent

Agent
MDB Associates
Agent address
Ladysden Farm Winchet Hill Goudhurst Kent TN17 1JX

Planning decision

Statutory period
56 days

Publicity

Last advertised
22 April 2026
Advertisement expiry
13 May 2026
Site notice start
13 April 2026
Site notice end
4 May 2026

Additional information

Planning Portal ID
PP-14507607
Comments
0
Documents
22

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: 7-12, Montagu Square W1On this site · +2 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.

© 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.

Source: Westminster

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

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