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7, Ambleside Crescent, EN3 7LZ

25/03480/HOUFull planning permissionRefused
Full

Refused on 20 February 2026

2 reasons for refusal

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

Part single, part 2 storey rear/side extension, front extension and front porch with conversion of garage into habitable room involving alterations to front fenestration together with rear dormer and front rooflights including extension to roof.

Submitted
13 January 2026
  1. Received13 Jan
  2. Validated
  3. Consult.
  4. Target
  5. Decided20 Feb

Decided in 38 days (council typically 49)

About this application

This is a planning application for a dormer extension at 7, Ambleside Crescent, EN3 7LZ. Enfield has handled 1,094 applications of this type. This one was decided in 38 days, 11 days quicker than Enfield's typical decision time. The site is in a conservation area. There has been 1 other application at this address. In the past year there have been 152 applications across Brimsdown. We hold 2,957 applications in total for the EN3 postcode area.

68% of full planning permission applications at London Borough of Enfield were approved. Across all application types, the council typically decides in about 7 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

  1. The proposed two storey side extension, by reason of its excessive width and the absence of a 1m set back from the common boundary with No. 9 Ambleside Crescent, would result in a visually incongruous and overly dominant form of development. The proposal would disrupt the established rhythm of spacing between properties, create the appearance of a continuous facade, and fail to respect the character and appearance of the host dwelling and the surrounding street scene. The proposal is therefore contrary to Policy CP30 of the Enfield Core Strategy (2010) and Policies DMD14 and DMD37 of the Enfield Development Management Document (2014).
  2. The proposed rear dormer, by reason of its overall size extending over the existing and extended roof plane, and failure to retain any insets from the roof ridge, eaves or sides, would represent an overly dominant form of development which would be detrimental to the appearance of the host dwelling and would be out of keeping with the character of the immediately surrounding area. The proposal is therefore contrary to Policy CP30 of the Enfield Core Strategy (2010) and Policies DMD13 and DMD37 of the Enfield Development Management Document (2014).

From the council's decision notice.

Application details

Postcode
EN3 7LZ
Application type
Full planning permission

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Article 4 direction: Borough wide
  • Flood zone 1: Low probability (rivers and sea)

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: Enfield

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

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