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21 Colston Avenue Carshalton SM5 2PH

DM2026/00105PA Householder Rear ExtensionApproved
Householder

Approved on 5 March 2026

Council decision: Prior Approval Not RequiredDelegated (officer decision)

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

Prior Approval for a single storey rear extension projecting from the rear of the original house by 4m.

Received
30 January 2026
Decision level
Delegated (officer decision)
Ward
Carshalton Central
  1. Received30 Jan
  2. Validated30 Jan
  3. Consult.25 Feb
  4. Target13 Mar
  5. Decided5 Mar

Decided in 34 days (council typically 56)

About this application

This is an outline application for a single storey rear extension at 21 Colston Avenue Carshalton SM5 2PH. Sutton has handled 404 applications of this type. This one was decided in 34 days, 3 weeks quicker than Sutton's typical decision time. The site is in a conservation area. There are no previous applications recorded at this address. In the past year there have been 126 applications across Carshalton Central. We hold 645 applications in total for the SM5 postcode area.

82% of outline applications at London Borough of Sutton 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.See what's approved near your address

Application details

Postcode
SM5 2PH
Application type
PA Householder Rear Extension
Scale / size
Small

Planning application dates

Date validated
30 January 2026
Consultation expiry
25 February 2026
Neighbour consultation end
25 February 2026
Target decision date
13 March 2026

Planning decision

Statutory period
42 days

Additional information

Comments
0
Documents
6
Constraints
10

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)

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.

Source: Sutton

Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.

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