12 Garthorne Road, London, SE23 1EW
Proposal
Lawful Development Certificate (proposed) for construction of one dormer at the rear sloped roof of the main building and one dormer at the top of the original outrigger (L Shape loft extension) with installation of a Juliet Balcony to the rear and two rooflights at the front at 12 GARTHORNE ROAD, SE23, together with replacement of the ground floor rear door, and extending the flue pipe.
- Received
- 15 July 2020
- Decided
- 12 August 2020 · Granted
- Decision level
- Delegated (officer decision)
- Council
- London Borough of Lewisham
- Ward
- Crofton Park
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.
- ReceivedSubmitted15 Jul
- ValidatedValidated17 Jul
- Consult.Consultation11 Sep
- TargetTarget Date11 Sep
- DecidedDecided12 Aug
Decided in 26 days (council typically 56)
This is an outline application for a dormer extension at 12 GARTHORNE ROAD, LONDON, SE23 1EW. Lewisham has handled 1,023 applications of this type and approves 80% of them, typically deciding them in 54 days. This one was decided in 28 days, 4 weeks quicker than Lewisham's median. There are no previous applications recorded at this address. In the past year there have been 140 applications across Crofton Park. We hold 2,594 applications in total for the SE23 postcode area.
Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
Source: Lewisham
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Planning constraints
Designations that overlap or adjoin the site outline.
- Article 4 direction: Small HMO Northern Extension
- Flood zone 1: Low probability (rivers and sea)
Possibly incomplete for this council: tree preservation orders.
Also checked, none recorded (22)
flood storage areas, conservation areas, listed buildings, 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 2026-10-09. 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.
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