6, Tonsley Hill, London, SW18 1BB
Approved on 24 March 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 mansard extension to main rear roof slope to create a self contained 2 bed flat across second and roof level, internal remodelling of existing flats
- Submitted
- 2 December 2025
- Council
- London Borough of Wandsworth
- ReceivedSubmitted2 Dec
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided24 Mar
Decided in 112 days (council typically 56)
About this application
This is a planning application for an extension at 6, Tonsley Hill, London, SW18 1BB. Wandsworth has handled 878 applications of this type. This one was decided in 112 days, 8 weeks longer than Wandsworth's typical decision time. The site is in 2 listed buildings nearby. There are no previous applications recorded at this address. In the past year there have been 143 applications across Wandsworth Town. We hold 2,266 applications in total for the SW18 postcode area.
88% of full planning permission applications at London Borough of Wandsworth 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
- SW18 1BB
- Application type
- Full planning permission
Site constraints
Designations that overlap or adjoin the site outline.
- Flood zone 1: Low probability (rivers and sea)
Not published by this council, so not checked: Article 4 directions. Ask the council if these matter.
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 2026-11-03. 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
2 other applications at this property, newest first.
Source: Wandsworth
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
For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering2.8 mi
- Avent Roofing ServicesVerifiedWestminsterRoofing4.1 mi
- Bello Electrics LTDVerifiedElectrician4.5 mi
- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman5.0 mi
Planning something similar?
See what the council approved and refused for loft conversions and dormers on your street. Pick your home and get the evidence before you pay for drawings.