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23 Sumner Place, London, SW7 3EG

LB/25/06077Listed Building ConsentApproved

Approved on 12 March 2026

Council decision: Grant Planning Permission/Consent5 conditions

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

Provision of condenser unit within acoustic enclosure at rear lower ground floor lightwell; replacement of 1x window with 1x timber French doors on the rear elevation at lower ground floor level; replacement of 1x casement window with 1x timber sash window at rear closet wing; provision of two extract vents behind air bricks at rear elevation; and internal alterations to improve layout with restoration of historic detailing

Received
6 October 2025
Ward
Courtfield
  1. Received6 Oct
  2. Validated
  3. Consult.14 Nov
  4. Target1 Dec
  5. Decided12 Mar

Decided in 157 days (council typically 56)

About this application

This is a heritage application for window replacement at 23 Sumner Place, London, SW7 3EG. Kensington has handled 1,418 applications of this type. This one was decided in 157 days, 14 weeks longer than Kensington's typical decision time. The site is in a conservation area, with 4 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 191 applications across Courtfield. We hold 1,522 applications in total for the SW7 postcode area.

93% of heritage applications at Royal Borough of Kensington and Chelsea were approved. Across all application types, the council typically decides in about 8 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
SW7 3EG
Application type
Listed Building Consent
Scale / size
Small
Parish
06
District
Thurloe and Smith's Charity

Planning application dates

Validated
6 October 2025
Consultation expiry
14 November 2025
Consultation end
14 November 2025
Target decision date
1 December 2025

Planning decision

Statutory period
56 days

Additional information

Documents
16

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Thurloe/Smith's Charity
  • Listed building: Grade II: Entrance Arch From Sumner PlaceOn or next to this site
  • Article 4 direction: Article 4 - No 100
  • Tree Preservation OrderCovers the site
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (20)

flood storage areas, 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: Kensington

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

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