20 Trinity Road SW17 7RE
Approved on 23 July 2026
Council decision: Approve with Conditions CIL Liable
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
INFILL OF EXISTING REAR COURTYARD / STORAGE AREA AT GROUND FLOOR. TWO STOREY REAR EXTENSION AT FIRST AND SECOND FLOOR, ERECTION OF MANSARD ROOF EXTENSION TO MAIN ROOF IN RELATION TO REDEVELOPMENT OF EXISTING FIRST FLOOR FLAT 2-BED/3-PERS FLAT TO IMPROVE ACCESS & IMPROVE INTERNAL SIZE/LAYOUT. CREATION OF 2-BED/3-PERSON FLAT AT ROOF LEVEL. ASSOCIATED BALCONY WITH 1.7M HIGH OBSCURED GLAZED BALUSTRADE AT FIRST FLOOR & COVERED/SECURE COMMUNAL REFUSE/CYCLE STORAGE AT GROUND FLOOR. NEW COMMUNAL ACCESS & STAIRS TO FLATS TO AVOID WALKING THROUGH COMMERCIAL UNIT & REMOVAL OF EXISTING REAR ACCESS STAIRS ON BOUNDARY WITH NO.22 TRINITY ROAD
- Received
- 28 May 2026
- Council
- London Borough of Wandsworth
- ReceivedReceived28 May
- ValidatedValidated28 May
- Consult.Consultation
- TargetTarget Date
- DecidedDecided23 Jul
Decided in 56 days (council typically 56)
About this application
This is a full planning application for a two storey rear extension at 20 Trinity Road SW17 7RE. Wandsworth has handled 3,005 applications of this type. This one was decided in 56 days. The site is in 1 listed building nearby. There has been 1 other application at this address. We hold 1,578 applications in total for the SW17 postcode area.
91% of full 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
- SW17 7RE
- Application type
- Application for Full Permission
- Scale / size
- Small
Planning application dates
- Date validated
- 28 May 2026
- Application expires
- 23 July 2026
Planning decision
- Statutory period
- 56 days
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
- 20 Trinity Road SW17 7RE2026/3119 · OutlineApproved0.0 mi
- 26 Trinity Road SW17 7RE2023/4854 · AmendmentApproved0.0 mi
- Ground Floor 36 Trinity Road SW17 7RE2025/1016 · FullWithdrawn0.0 mi
- 57-59 Trinity Road Wandsworth London Wandsworth SW17 7SD2026/2390 · FullAwaiting decision0.0 mi
- Pavement o/s 330 Balham High Rd SW17 7AA2026/2191 · AdvertisingRefused0.0 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 LTDVerifiedElectrician2.6 mi
- Avent Roofing ServicesVerifiedWestminsterRoofing5.1 mi
- Lambert Heating & Renewables LtdVerified5.6 mi
Planning something similar?
See what the council approved and refused for two-storey and first-floor extensions on your street. Pick your home and get the evidence before you pay for drawings.