Skip to content

46 Sudbury Court Drive, Harrow, HA1 3TD

25/2959HouseholderRefused

Refused on 12 January 2026

Council decision: Permission RefusedDelegated (officer decision)4 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 erection of first floor rear extension, full width rear dormer, creation of a mansard roof with 9x rooflights and removal of 2x chimney stacks plus replacement of roof tiles, two storey front extension with full height glazing and split stone finish, conversion of existing garage into habitable room including replacement of garage door with a window, alterations to create pitched roof to single storey rear, reduction of ground floor bay and external alterations including replacement of all windows, introduction of render and insertion of new windows and doors to front, side and rear elevations and erection of a boundary and front wall, 1x pedestrian and 2x vehicle electric gates to forecourt, hard and soft landscaping and new dropped kerb to dwellinghouse.

Received
20 October 2025
Decision level
Delegated (officer decision)
Public comments
3
Ward
Northwick Park
Agent
Studio Casa
  1. Received20 Oct
  2. Validated17 Nov
  3. Consult.8 Dec
  4. Target
  5. Decided12 Jan

Decided in 56 days (council typically 56)

About this application

This is a full planning application for a dormer extension at 46 Sudbury Court Drive, Harrow, HA1 3TD. Brent has handled 4,396 applications of this type. This one was decided in 84 days, 4 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 128 applications across Northwick Park. We hold 2,197 applications in total for the HA1 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 first floor rear extension, mansard roof extension and front extensions by reason of their unacceptable design would appear as bulky and incongruous additions which would fail to respect the character of the original dwelling. The combined extensions appear out of context and an overdevelopment, especially at roof level. This is contrary to Policy DMP1 of the Brent Local Plan 2019-2041 and Brent’s Residential Extensions and Alterations SPD.
  2. The contemporary nature of the front extension, through the design and finishing details proposed would have a negative impact on the streetscene as it would be significantly out of keeping with the context. It would fail to comply with Policy BD1 of Brent’s Local Plan 2019-2041.
  3. The proposal would result in an excessive level of off-street car parking within the site, contrary to Policy BT2 of Brents Local Plan 2019-2041, resulting in increased car ownership and use to the detriment of traffic congestion, air pollution and climate change.
  4. The proposal would have a detrimental impact on the visual amenity of the site and its natural drainage through the loss of soft landscaping, loss of regulatory traffic signage and likely damage to a street tree, without providing any highway safety benefit in terms of allowing cars to turn more easily on the site, contrary to Brent Local Plan (2019-2041) Policies BT2, BT4 and BGI2, the Residential Extensions and Alterations SPD and Brent’s Domestic Vehicle Footway Crossover Policy.

From the council's decision notice.

Application details

Postcode
HA1 3TD
Application type
Householder
Scale / size
Small

Planning application dates

Date validated
17 November 2025
Consultation expiry
8 December 2025
Neighbour consultation end
8 December 2025
Last date for comments
12 January 2026

Applicant and agent

Agent
Studio Casa
Agent address
2 Oak Hill, Surbiton, KT6 6EH

Additional information

Planning Portal ID
PP-14419178
Documents
8

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
  • Flood zone 1: Low probability (rivers and sea)
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.

Track this application

Get email alerts when there is a planning decision or status change.

Get email alerts near HA1

New planning applications delivered to your inbox daily.

Around this site

Discuss this application on r/PlanningPermissionUK

For applicants and trades

What's been approved on your street?

See what the council approved and refused near this address for the project you have in mind, and the rules that apply here.

Get The Signal Report