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46 Birchen Grove, London, NW9 8SA

25/2255HouseholderRefused

Refused on 23 October 2025

Council decision: Permission RefusedDelegated (officer decision)5 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

Demolition of garage/side extension and erection of a single and two storey side and rear extension, basement extension, rear dormer window, roof extension and creation of front porch to dwellinghouse

Received
4 August 2025
Decision level
Delegated (officer decision)
Public comments
2
Ward
Welsh Harp
Agent
Mr. Planning Consultant
  1. Received4 Aug
  2. Validated26 Aug
  3. Consult.22 Sep
  4. Target
  5. Decided23 Oct

Decided in 58 days (council typically 56)

About this application

This is a full planning application for demolition at 46 Birchen Grove, London, NW9 8SA. Brent has handled 4,396 applications of this type. This one was decided in 80 days, 3 weeks longer than Brent's typical decision time. The site is in a conservation area, with 1 listed building nearby. There have been 4 other applications at this address. In the past year there have been 131 applications across Welsh Harp. We hold 1,900 applications in total for the NW9 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. Having regard to the inaccurate and inconsistent plans submitted, the Local Planning Authority is unable to make a full assessment on this application. This is contrary to policy DMP1 of Brent's Local Plan 2019-2041.
  2. The proposed basement extension by reason of its excessive width, depth and visibility above ground level would fail to form an acceptable relationship with the main dwelling. This is contrary to policy DMP1 of Brent's Local Plan 2019-2041 and the guidance in Brent's Basment SPD 2017.
  3. The proposed ground floor rear extension by reason of its excessive height and depth would fail to form an acceptable relationship with the main dwelling and its rear garden setting and would therefore be out of keeping and character. This is contrary to policy DMP1 of Brent's Local Plan 2019-2041 and the guidance in Brent's Residential Extensions and Alterations SPD 2025.
  4. The proposed ground floor rear extension by reason of its excessive height and depth, in combination with the ground level changes with the neighbouring properties, would have an unduly detrimental impact to the amenities of the neighbours at No.44 and No.48 Birchen Grove in terms of loss of light, outlook and overbearing nature. This is contrary to policy DMP1 of Brent's Local Plan 2019-2041 and the guidance in Brent's Residential Extensions and Alterations SPD 2025.
  5. The proposed development has failed to demonstrate that it would be resistant and resilient to surface, fluvial and tidal flooding. This is contrary to policies DMP1 and BSUI3 of Brent's Local Plan 2019-2041 and the guidance in Brent's Basement SPD 2017.

From the council's decision notice.

Application details

Postcode
NW9 8SA
Application type
Householder
Scale / size
Small

Planning application dates

Date validated
26 August 2025
Consultation expiry
22 September 2025
Neighbour consultation end
22 September 2025
Last date for comments
21 October 2025

Applicant and agent

Agent
Mr. Planning Consultant
Agent address
5th Floor, 167-169 Great Portland Street, London, W1W 5PF

Additional information

Planning Portal ID
PP-14227115
Documents
7
Constraints
3

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Flood zone 3: High probability (rivers and sea)Part of the site
  • Article 4 direction: Article 4 for HMOs
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.

Source: Brent

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

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