23, Sanderstead Avenue, Cricklewood, NW2 1SE
Refused on 11 February 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
Single storey side and rear extensions. Roof extension involving enlargement of the rear dormer window and 2no. front dormer windows
- Submitted
- 17 December 2025
- Council
- London Borough of Barnet
- ReceivedSubmitted17 Dec
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided11 Feb
Decided in 56 days (council typically 56)
About this application
This is a planning application for a dormer extension at 23, Sanderstead Avenue, Cricklewood, NW2 1SE. Barnet has handled 1,187 applications of this type. This one was decided in 56 days. There have been 2 other applications at this address. In the past year there have been 164 applications across CH22. We hold 2,756 applications in total for the NW2 postcode area.
82% of householder planning permission applications at London Borough of Barnet 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
Why it was refused
- The proposed rear dormer roof extension, together with the single storey rear extension by reason of their width, size, scale, design and siting would individually and cumulatively result in an unsympathetic and visually discordant form of development, appearing unduly bulky, incongruous additions to the host property, to the detriment of the character and appearance of the host property, the street scene and surrounding area, contrary to Policy D3 of the London Plan (2021), Policies CDH01 and CDH05 of the LB Barnet Local Plan (2025) and the Residential Design Guidance SPD (2016).
- The proposed single storey rear extension adjacent to the boundary with 25 Sanderstead Avenue, by reason of its excessive rearward projection, size and siting, would have an unacceptable adverse impact on the residential amenities of neighbouring occupiers, appearing overbearing, visually obtrusive and resulting in an undue loss of outlook and increased sense of enclosure, contrary to Policy D3 of the London Plan (2021), Policies CDH01 and CDH05 of the LB Barnet: Local Plan (2025) and the LB Barnet: Residential Design Guidance SPD (2016)
From the council's decision notice.
Application details
- Postcode
- NW2 1SE
- Application type
- Householder planning permission
Site constraints
Designations that overlap or adjoin the site outline.
- Article 4 direction: Article 4 Small Houses in Multiple Occupation (HMO) Area 1
- Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (23)
flood storage areas, conservation areas, listed buildings, tree preservation orders, 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
3 other applications at this property, newest first.
- 20266 May
Single storey side and rear extensions. Roof extension involving 2no. front dormer windows. Front Porch…
ApprovedHouseholder26/1701/HSE - 202513 Nov
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.00 metres and eaves…
ApprovedPrior Approval: Larger Home Extension25/4525/PNH - 20251 Oct
Single storey rear extension with a proposed depth of 6.00 metres, maximum height of 3.00 metres and eaves…
RefusedHouseholder25/3987/PNH
Source: Barnet
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Around this site
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For applicants and trades
Contractors near this project
Find contractors for extensions near this site- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman4.0 mi
- Avent Roofing ServicesVerifiedWestminsterRoofing4.8 mi
- Orient Construction Consultancy LimitedVerifiedLondon6.0 mi
- Building Services LondonVerifiedLondonExtensionsLoft Conversions8.6 mi
Planning something similar?
See what the council approved and refused for wrap-around (side and rear) extensions on your street. Pick your home and get the evidence before you pay for drawings.