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320B High Road, London, NW10 2EN

26/0047Full planning permissionRefused
Full

Refused on 19 March 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

Proposed rear dormer extension to rear outrigger of first-floor flat (Restrospective)

Submitted
22 January 2026
  1. Received22 Jan
  2. Validated
  3. Consult.
  4. Target
  5. Decided19 Mar

Decided in 56 days (council typically 56)

About this application

This is a planning application for a dormer extension at 320B High Road, London, NW10 2EN. Brent has handled 580 applications of this type. This one was decided in 56 days. The site is in a conservation area. There are no previous applications recorded at this address. In the past year there have been 99 applications across Roundwood. We hold 4,518 applications in total for the NW10 postcode area.

70% of full planning permission applications at London Borough of Brent 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

  1. The proposed roof extension over the outrigger to form an L shape dormer, by reason of its size and siting and in particular, the element of the dormer that would extend onto the whole roof of the outrigger of the applicant building is deemed to result in a bulky, over dominant structure that is harmful to the character and appearance of the host building and the established pattern of development of the surrounding area. The proposed development is therefore contrary to DMP1 of Brent's Local Plan (2019-2041) and the Residential Extensions & Alterations SPD (2025).
  2. The submitted plans have failed to accurately depict the existing and proposed scenarios at the subject site due to inconsistencies and inaccuracies in the submitted set of drawings. Therefore the application has failed to demonstrate the acceptability of the scheme and has failed to demonstrate compliance with policy DMP1 of Brent’s Local Plan (2019-41).

From the council's decision notice.

Application details

Postcode
NW10 2EN
Application type
Full planning permission

Applicant and agent

Architect profile
A DESIGN STUDIO LIMITED

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Article 4 direction: Article 4 for HMOs
  • Brownfield land register: 298-300 High Road, London, NW10 2ENRegister site at or near this address · +1 more
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (22)

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 and heritage coasts.

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: Brent

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

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