13 Mulgrave Road, Harrow, HA1 3UG
Refused on 21 September 2026
Council decision: Permission Refused3 reasons for refusal
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 part single part two storey side to rear extension with rear glazed canopy, part front extension, 1x side and 1x rear dormer extension with Juliet balcony and associated roof works, conversion of garage into habitable space with replacement of garage door with windows, 2x rooflights, installation of 2x windows to side elevation and removal of chimney stacks to the dwellinghouse.
- Received
- 13 July 2026
- Public comments
- 0 · last counted 3 November 2026
- Council
- London Borough of Brent
- Ward
- Northwick Park
- ReceivedReceived13 Jul
- ValidatedValidated27 Jul
- Consult.Consultation
- TargetTarget Date
- DecidedDecided21 Sep
Decided in 56 days
About this application
This is a planning application for a dormer extension at 13 Mulgrave Road, Harrow, HA1 3UG. Brent has handled 17,107 applications of this type. This one was decided in 56 days. 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 2,198 applications in total for the HA1 postcode area.
Why it was refused
- The front and porch extensions, by reason of their excessive combined bulk would be overbearing and detract from the original principal elevation of the dwelling, failing to be subservient. This is contrary to Policy DMP1 of the Brent’s Local Plan 2019-2041, and Brent’s Residential Extensions and Alterations SPD 2025.
- The proposed combined roof level extensions, by reason of the excessive addition of bulk and creation of a mansard roof, would appear as incongruous and out of character additions which would significantly alter the roof level of the dwellinghouse equating to overdevelopment, contrary to Policy DMP1 of the Brent’s Local Plan 2019-2041, and Brent’s Residential Extensions and Alterations SPD 2025.
- The proposed ground floor rear extension by reason of its excessive height on the boundary, would have an unacceptable impact on neighbouring amenity by means of an increased sense of enclosure and overbearing appearance, contrary to Policy DMP1 of the Brent’s Local Plan 2019-2041, and Brent’s Residential Extensions and Alterations SPD 2025.
From the council's decision notice.
Application details
- Postcode
- HA1 3UG
Planning application dates
- Date validated
- 27 July 2026
Applicant and agent
- Applicant
- Private applicant
Planning decision
- Case officer
- Brooke Storey-Vowles
Additional information
- Documents
- 12
Site constraints
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.
Planning history at this site
1 other application at this property, newest first.
Source: Brent
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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