12 Marlborough Avenue Edgware HA8 8UH
Proposal
Removal and alteration of existing roof above existing two storey side (Phase 1). Roof extension involving wraparound side and rear dormer windows (Phase 2). (Phase 2 to commence when phase 1 completed)
- Received
- 29 May 2026
- Decided
- 24 July 2026
- Council
- London Borough of Barnet
- Ward
- Edgwarebury
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.
- ReceivedSubmitted29 May
- ValidatedValidated29 May
- Consult.Consultation
- TargetTarget Date24 Jul
- DecidedDecided24 Jul
Decided in 56 days (council typically 49)
This is an outline application for a dormer extension at 12 Marlborough Avenue Edgware HA8 8UH. Barnet has handled 2,167 applications of this type and approves 74% of them, typically deciding them in 33 days. This one was decided in 56 days, 3 weeks longer than Barnet's median. There have been 2 other applications at this address. In the past year there have been 53 applications across Edgwarebury. We hold 1,319 applications in total for the HA8 postcode area.
Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
Source: Barnet
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 HA8
New planning applications delivered to your inbox weekly.
Planning history at this site
4 other applications at this property, newest first.
- 202619 Aug
Part single, part two storey rear extension. First floor side extension. Roof extension involving side and…
PendingHouseholder26/3039/HSE - 202618 Feb
Roof extension involving side/rear wraparound dormer
RefusedProposed Lawful Development Certificate26/0630/192 - 202524 Oct
Front porch extension including the relocation of the front door and new access steps. First floor side…
ApprovedHouseholder25/4255/HSE - 202524 Oct
Single storey rear extension with a proposed depth of 6.00m, maximum height of 3.00m and eaves height of 2.70m
ApprovedHouseholder25/4254/PNH
Planning constraints
Designations that overlap or adjoin the site outline.
- Article 4 direction: Article 4 Small Houses in Multiple Occupation (HMO) Area 1
- 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 2026-10-09. 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.
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.