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33, Onslow Avenue, SM2 7ED

DM2025/01179Non-Material AmendmentRefused
Discharge / amendments

Refused on 7 October 2025

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

Non material amendment to approved application DM2024/00527 which allowed the 'Erection of a single storey rear extension,' to allow for alterations to rear extension roof eaves and verge and installation of two air conditioning units to rear elevation.

Submitted
15 September 2025
  1. Received15 Sep
  2. Validated
  3. Consult.
  4. Target
  5. Decided7 Oct

Decided in 22 days (council typically 56)

About this application

This is a planning application for a single storey rear extension at 33, Onslow Avenue, SM2 7ED. Sutton has handled 64 applications of this type. This one was decided in 22 days, 5 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 124 applications across Cheam. We hold 537 applications in total for the SM2 postcode area.

87% of non-material amendment 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
SM2 7ED
Application type
Non-Material Amendment

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.

Associated applications

  1. 2025
    15 Sep

    Non material amendment to approved application DM2024/00527

    This applicationRefusedNon-material amendmentDM2025/01179
  2. 2024
    17 Apr

    Erection of a single storey rear extension.

    ApprovedHouseholderPart ofDM2024/00527

Source: Sutton

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

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