74 Thurlow Hill London Lambeth SE21 8JN
Refused on 10 July 2026
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
Erection of a first floor single storey side extension, the replacement of the ground floor rear windows for french doors and the addition of a windos to the first floor side elevation.
- Submitted
- 15 May 2026
- Council
- London Borough of Lambeth
- ReceivedSubmitted15 May
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided10 Jul
Decided in 56 days
About this application
This is a planning application for a single storey side extension at 74 Thurlow Hill London Lambeth SE21 8JN. Lambeth has handled 15,936 applications of this type. This one was decided in 56 days. There have been 3 other applications at this address. We hold 1,059 applications in total for the SE21 postcode area.
Why it was refused
- The proposed development, by reason of its cumulative scale and massing and the unsympathetic roof form, would fail to constitute a subordinate addition to the host dwelling. It would result in an unduly bulky and dominant form that would harm the character and proportions of the host building and unbalance the pair of semi- detached properties, contrary to policies requiring extensions to be proportionate and sympathetic to the host dwelling. The proposal is therefore contrary to Policies Q5 and Q11 of the Local Plan (2021) and the guidance contained within the Supplementary Planning Document (2023).
From the council's decision notice.
Application details
- Postcode
- SE21 8JN
Site constraints
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.
Planning history at this site
4 other applications at this property, newest first.
- 202623 Jul
Erection of a single storey ground floor rear and front side infill extension and a first floor side…
RefusedApplication26/02151/FUL - 20262 Jan
Erection of a ground floor single storey rear extension, and excavation of basement to create a basement…
RefusedApplication26/00004/FUL - 202523 Dec
Erection of a first floor side extension, and alteration to the ground floor front elevation comprising…
RefusedFull Planning Permission25/04003/FUL - 202523 Dec
Application for a Certificate of Lawful Certificate (Proposed) for the erection of a hip-to-gable rear dormer…
ApprovedCertificate of Lawful Use proposed25/04002/LDCP
Source: Lambeth
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Around this site
Nearby applications
- 74 Thurlow Hill London Lambeth SE21 8JN25/04002/LDCP · OutlineApproved0.0 mi
- 74 Thurlow Hill London Lambeth SE21 8JN25/04003/FUL · FullRefused0.0 mi
- 66 Thurlow Hill London SE21 8JN24/02402/LDCP · OutlineRefused0.0 mi
- 82 Thurlow Hill London Lambeth SE21 8JN25/03355/PDE · OutlineRefused0.0 mi
- 14 Birkbeck Place London Lambeth SE21 8JU23/02805/FUL · FullApproved0.1 mi
For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering1.3 mi
- Bello Electrics LTDVerifiedElectrician3.3 mi
- Avent Roofing ServicesVerifiedWestminsterRoofing4.9 mi
- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman5.9 mi
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