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45 St Louis Road London SE27 9QJ

25/03379/FULFull Planning PermissionRefused
Full

Refused on 15 January 2026

Council decision: Refuse PermissionDelegated (officer decision)3 reasons for refusal

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

Conversion of existing single dwelling into two self-contained dwellings including the erection of a ground and first floor rear extension and associated works.

Received
28 October 2025
Decision level
Delegated (officer decision)
Public comments
4
Ward
Gipsy Hill
  1. Received28 Oct
  2. Validated28 Oct
  3. Consult.27 Nov
  4. Target23 Dec
  5. Decided15 Jan

Decided in 79 days (council typically 56)

About this application

This is a full planning application for a rear extension at 45 St Louis Road London SE27 9QJ. Lambeth has handled 398 applications of this type. This one was decided in 79 days, 3 weeks longer than Lambeth's typical decision time. There have been 2 other applications at this address. In the past year there have been 43 applications across Gipsy Hill. We hold 1,060 applications in total for the SE27 postcode area.

70% of full applications at London Borough of Lambeth 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.See what's approved near your address

Why it was refused

  1. The proposed extensions by reason of their scale, bulk and massing would result in an insubordinate addition to the host dwellinghouse that would fail to respond to the original architectural detailing and would be contrary to the objectives of adopted Lambeth Design Guide and policies Q5 and Q11 of the Lambeth Local Plan (2021). London planning@lambeth.gov.uk SW2 9QQ
  2. The proposed extensions by reason of their siting and depth would result in an unacceptable impact on the residential amenity of neighbouring occupiers especially in regard to an increased sense of enclosure contrary to the objectives of policy Q2 of the Lambeth Local Plan (2021).
  3. In the absence of a S106 agreement, the application fails to mitigate the impacts of the proposed development, as such, the proposal is contrary to the objectives of policy D4 of the Lambeth Local Plan (2021).

From the council's decision notice.

Application details

Postcode
SE27 9QJ
Application type
Full Planning Permission
Scale / size
Small

Planning application dates

Date validated
28 October 2025
Consultation expiry
15 January 2026
Consultation end
27 November 2025
Neighbour consultation end
15 January 2026
Target decision date
23 December 2025

Applicant and agent

Agent
Stantec
Agent address
3rd Floor Arthur Stanley House 40-50 Tottenham Street London W1T 4RN

Planning decision

Case officer
Mrs Ruth Brown
Statutory period
56 days

Additional information

Documents
26
Constraints
1

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (24)

flood storage areas, conservation areas, listed buildings, Article 4 directions, 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: Lambeth

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

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