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102B Dartmouth Road, London, NW2 4HB

26/0726Full Planning PermissionRefused
Full

Refused on 12 June 2026

Council decision: Permission RefusedDelegated (officer decision)3 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 single storey rear and rear infill extensions with green roof, rear lightwell, alterations to fenestration and new timber decking in rear garden of the flat.

Received
23 March 2026
Decision level
Delegated (officer decision)
Public comments
11
Ward
Cricklewood & Mapesbury
Agent
AGA Associates
  1. Received23 Mar
  2. Validated16 Apr
  3. Consult.27 May
  4. Target
  5. Decided12 Jun

Decided in 57 days (council typically 56)

About this application

This is a full planning application for an extension at 102B Dartmouth Road, London, NW2 4HB. Brent has handled 4,396 applications of this type. This one was decided in 81 days, 4 weeks longer than Brent's typical decision time. The site is in a conservation area. There have been 2 other applications at this address. In the past year there have been 121 applications across Cricklewood & Mapesbury. We hold 2,752 applications in total for the NW2 postcode area.

77% of full 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.See what's approved near your address

Why it was refused

  1. The proposed rear extension, patio and associated works by virtue of their scale and design would materially harm the character of the house and the conservation area in terms of excessive depth and height contrary to Policy DMP1 and BHC1 of Brent’s Local Plan 2019-2041 and the provisions of Mapesbury Conservation Area Design Guide (2018).
  2. The proposed rear extension and rear patio and associated works by virtue of scale and design would materially harm neighbouring amenity in terms of excessive scale and inappropriate design which would lead to excessive overlooking and overshadowing of neighbouring properties contrary to Policy DMP1 and BHC1 of Brent’s Local Plan 2019-2041 and the provisions of Mapesbury Conservation Area Design Guide (2018).
  3. The proposal has failed to provide sufficient information to establish a 10% uplift in on-site biodiversity as required by national Biodiversity Net Gain requirements in line with the Environment Act 2021.

From the council's decision notice.

Application details

Postcode
NW2 4HB
Application type
Full Planning Permission
Scale / size
Small

Planning application dates

Date validated
16 April 2026
Consultation expiry
27 May 2026
Neighbour consultation end
27 May 2026
Last date for comments
11 June 2026

Applicant and agent

Applicant
Private applicant
Agent
AGA Associates
Architect profile
AGA ASSOCIATES LTD
Agent address
13 Hanover Square, London, W1S 1HN

Planning decision

Case officer
Desmond Lam

Additional information

Planning Portal ID
PP-14798109
Documents
52
Constraints
2

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Mapesbury
  • Article 4 direction: Article 4 for HMOs+1 more
  • Tree Preservation Order: Ref 25/00012Protected tree on or next to this site
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (21)

flood storage 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: Brent

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

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