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4 Greenhill Park, London, NW10 9AR

25/2617Full Planning PermissionRefused
Full

Refused on 18 February 2026

Council decision: Permission RefusedDelegated (officer decision)1 reason 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 extension to the ground floor flat.

Received
12 September 2025
Decision level
Delegated (officer decision)
Ward
Harlesden & Kensal Green
Agent
Keenan Project Designs Ltd
  1. Received12 Sep
  2. Validated22 Sep
  3. Consult.14 Oct
  4. Target
  5. Decided18 Feb

Decided in 149 days (council typically 56)

About this application

This is a full planning application for a single storey rear extension at 4 Greenhill Park, London, NW10 9AR. Brent has handled 4,396 applications of this type. This one was decided in 159 days, 15 weeks longer than Brent'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 148 applications across Harlesden & Kensal Green. We hold 4,516 applications in total for the NW10 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 side infill extension, due to its excessive cumulative depth, scale and eaves height, would result in an unduly overbearing form of development that causes an unacceptable impact on the amenity of neighbouring occupiers through increased enclosure and loss of outlook. The proposal substantially exceeds the design parameters set out in Section 3.5 of Brent’s Residential Extensions and Alterations SPD (2025). In addition, discrepancies within the submitted drawings regarding the separation distance fail to demonstrate fully the resultant relationships and therefore fail to demonstrate complaince with the guidance. The development is therefore contrary to Policy DMP1 of the Brent Local Plan 2019–2041.

From the council's decision notice.

Application details

Postcode
NW10 9AR
Application type
Full Planning Permission
Scale / size
Small

Planning application dates

Date validated
22 September 2025
Consultation expiry
14 October 2025
Neighbour consultation end
14 October 2025
Last date for comments
20 February 2026

Applicant and agent

Agent
Keenan Project Designs Ltd
Architect profile
KEENAN PROJECT DESIGNS LTD
Agent address
11A Dormer Place, Lemington Spa, CV32 5AA

Additional information

Planning Portal ID
PP-14218014
Comments
0
Documents
4
Constraints
1

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: 1A-D Greenhill Park, London, NW10 9AERegister site at or near this address
  • 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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