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45 St Louis Road London Lambeth SE27 9QJ

26/00693/FULRefused

Refused on 29 May 2026

4 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 with associated works including the erection of 2 ground floor, single storey rear infill extensions and rear dormer roof extension. (RECONSULTATION DUE TO CORRECTION TO THE OS MAP)

Submitted
16 March 2026
  1. Received16 Mar
  2. Validated16 Mar
  3. Consult.
  4. Target
  5. Decided29 May

Decided in 74 days

About this application

This is a planning application for a dormer extension at 45 St Louis Road London Lambeth SE27 9QJ. Lambeth has handled 15,924 applications of this type. This one was decided in 74 days, 3 weeks longer than Lambeth's typical decision time. There are no previous applications recorded at this address. We hold 1,060 applications in total for the SE27 postcode area.

Why it was refused

  1. The proposed roof extension, by reason of its location, design, bulk, and cumulative impact with the proposed rear extensions, would be an over-dominant addition which would have a detrimental impact on the character and appearance of the host building and wider terrace, 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 proposal is for under-sized dwellings which fail to provide the minimum floor area required by the Nationally Described Space Standards for three-storey, three-bedroom, five-person homes. As such the proposal is contrary to Policy D6 of the London Plan (2021) and H5 of the Lambeth Local Plan (2021).
  3. The proposed ground floor extensions, by reason of their siting and dimensions, would have 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).
  4. In the absence of a S106 agreement to secure the additional home as parking permit free with cycle hire and car share scheme memberships for all occupiers for the first three years, the application fails to mitigate the adverse transport impacts of the proposed development. As such, the proposal is contrary to the objectives of Policies D4, T3 and T6 of the Lambeth Local Plan (2021).

From the council's decision notice.

Application details

Postcode
SE27 9QJ

Planning application dates

Date validated
16 March 2026

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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