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12 Grange Road Edgware HA8 0PP

26/2645/HSERefused

Refused on 9 September 2026

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

Single storey side/rear extension following demolition of the existing conservatory

Submitted
15 July 2026
  1. Received15 Jul
  2. Validated
  3. Consult.
  4. Target
  5. Decided9 Sep

Decided in 56 days

About this application

This is a planning application for demolition at 12 Grange Road Edgware HA8 0PP. Barnet has handled 16,931 applications of this type. This one was decided in 56 days. The site is in the Watling Estate conservation area. There has been 1 other application at this address. We hold 1,450 applications in total for the HA8 postcode area.

Why it was refused

  1. The proposed wrap-around single storey extension, by reason of combined depth and width, bulk, massing and siting, would result in a disproportionate and unsympathetic addition, appearing unduly dominant and incongruous, leading to less than substantial harm to the significance of a designated heritage asset, against which no public benefits such as to outweigh the harm have been identified and failing to preserve or enhance the character and appearance of the Watling Estate Conservation Area, contrary to Policies HE4, HE5, HE6 and HE9 of the National Planning Policy Framework (2026), Policies D3 and HC1 of the London Plan (2021), Policies CDH01, CDH05 and CDH08 of the LB Barnet Local Plan (2025), the Sustainable Design and Development Guidance SPD (2026) and the Watling Estate Conservation Area Character Appraisal (2007)

From the council's decision notice.

Application details

Postcode
HA8 0PP

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: The Watling Estate
  • 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 (22)

flood storage 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: Barnet

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

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