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15, Parkside, Mill Hill, NW7 2LJ

26/1073/HSEHouseholder planning permissionRefused
Householder

Refused on 27 April 2026

2 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

Part single, part two storey rear and side extension with associated patio and access steps. Single storey front extension incorporating new front porch. Roof extension to include new hipped roof to side, 1 no. rear dormer window, 1no. side dormer window and 2 no. front facing rooflights. New front vehicular access and hardstanding to provide off-street parking

Submitted
20 March 2026
  1. Received20 Mar
  2. Validated
  3. Consult.
  4. Target
  5. Decided27 Apr

Decided in 38 days (council typically 56)

About this application

This is a planning application for a dormer extension at 15, Parkside, Mill Hill, NW7 2LJ. Barnet has handled 1,187 applications of this type. This one was decided in 38 days, 3 weeks quicker than Barnet's typical decision time. There are no previous applications recorded at this address. In the past year there have been 139 applications across MH22. We hold 1,045 applications in total for the NW7 postcode area.

82% of householder planning permission 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 development in particular the height of the single storey rear extension on a raised terrace plus the gable roof design to the first floor rear extension would result in substantial additions to the existing dwelling house which by virtue of their cumulative size, siting, design, scale, overall bulk would result in an overbearing impact and increased sense of enclosure to the detriment of neighbouring amenity of no.11 Parkside which would be exacerbated due to the level differences across the length of the sloping site. The proposal is therefore contrary to Policy CHD01 and CDH05 of the Local Plan (2025) and the LB Barnet Residential Design Guidance SPD (2016).
  2. The proposed single storey rear extension, rear gable extension to the roof and front facing rooflights by reason of their size, siting, height, design, scale and excessive projection to the rear would result in an insubordinate, disproportionate, and unsympathetic addition to the host property, detrimental to the character and appearance of the host property and the surrounding area, contrary to Policy D3 of the London Plan (2021);the NPPF (2023), Policy CDH01, CHD05 of the Barnet Local Plans (2025) and Sustainable Design and Construction SPD (2016) and Residential Design Guidance SPD (2016).

From the council's decision notice.

Application details

Postcode
NW7 2LJ
Application type
Householder planning permission

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.

Source: Barnet

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

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