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100 Leicester Road Barnet EN5 5DB

26/2862/HSEHouseholder ApplicationRefused
Householder

Refused on 29 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

Mansard roof extension with front and side dormer windows to provide additional storey at second floor level

Received
3 August 2026
Ward
Barnet Vale
Agent
SM12 Architects
  1. Received3 Aug
  2. Validated4 Aug
  3. Consult.
  4. Target29 Sep
  5. Decided29 Sep

Decided in 56 days (council typically 56)

About this application

This is a full planning application for a dormer extension at 100 Leicester Road Barnet EN5 5DB. Barnet has handled 4,516 applications of this type. This one was decided in 57 days. There has been 1 other application at this address. In the past year there have been 71 applications across Barnet Vale. We hold 3,744 applications in total for the EN5 postcode area.

77% of full applications at London Borough of Barnet 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 proposed mansard roof extension, by reason of its design, steep pitch, size, scale and prominent box-like massing, would constitute an incongruous and unsympathetic addition to the host dwelling. It would fail to respect the original architectural style, profile, and roof form of the existing building, resulting in a jarring feature within the street scene which would fail to respect the original architectural style, profile, and roof form of the building. The proposal is contrary to Policy D3 of the London Plan (2021), Policies CDH01 and CDH05 of the LB Barnet Local Plan (2025) and the Sustainable Design and Development Guidance SPD (2026).

From the council's decision notice.

Application details

Postcode
EN5 5DB
Application type
Householder Application
Scale / size
Small

Planning application dates

Date validated
4 August 2026
Consultation expiry
3 September 2026
Target decision date
29 September 2026

Applicant and agent

Agent
SM12 Architects
Agent address
12 Maycross Avenue Morden Surrey SM4 4DA

Planning decision

Statutory period
56 days

Publicity

Site notice start
13 August 2026
Site notice end
3 September 2026

Additional information

Planning Portal ID
PP-15127511
Comments
0
Documents
12

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

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 2026-11-03. 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.

Associated applications

  1. 2026
    3 Aug

    Conversion of the existing dwelling into 2no. self-contained flats including single storey rear extension…

    RefusedFull ApplicationFiled alongside26/2861/FUL
  2. 2026
    3 Aug

    Mansard roof extension with front and side dormer windows to provide additional storey at second floor level

    This applicationRefusedFull26/2862/HSE

Source: Barnet

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

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