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Partingdale Lane, Mill Hill, NW7 1NS

26/1374/S73Removal/Variation of a conditionRefused
Discharge / amendments

Refused on 21 May 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

Variation of condition 1 (Approved plans) of planning permission reference 23/3795/HSE dated 26/02/2024 for Roof replacement and refurbishment of existing outbuilding. Variation to include the addition of new windows to west elevation, 3no. small ventilation windows to east elevation. Removal of door from west elevation, approved skylights from roof, existing opaque window from north elevation, squaring off of south east corner, change of roof design, convert double door entrance to single at south elevation

Submitted
17 April 2026
  1. Received17 Apr
  2. Validated
  3. Consult.
  4. Target
  5. Decided21 May

Decided in 34 days (council typically 56)

About this application

This is a planning application for an outbuilding at Partingdale Lane, Mill Hill, NW7 1NS. Barnet has handled 116 applications of this type. This one was decided in 34 days, 3 weeks quicker than Barnet's typical decision time. The site is in 1 listed building nearby. There have been 2 other applications at this address. In the past year there have been 76 applications across TW22. We hold 1,044 applications in total for the NW7 postcode area.

80% of removal/variation of a condition 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 amendments would not fall within the scope of an application under Section 73 of the Town and Country Planning Act (1990) as amended, as the proposed amendments to the scheme, in particular the addition of new windows to west elevation and 3no. small ventilation windows to east elevation to the existing outbuilding, as well as the removal of door from west elevation, existing opaque window from north elevation, squaring off of south east corner and convert double door entrance to single at north elevation, would necessitate a change to the description of development in respect of the parent permission 23/3795/HSE, on the basis of which the application is refused in accordance with Section 73(2)(b).
  2. The proposed amendments, by reason of the introduction of an overhang roof canopy to the outbuilding, would result in a bulky and visually intrusive form of development, to the detriment of the character and appearance of the application site, the surrounding area and the green belt, contrary to Policy D3 of the London Plan (2021), Policies CDH01 and CDH05 of the LB Barnet Local Plan (2025) and the Residential Design Guidance SPD (2016).

From the council's decision notice.

Application details

Postcode
NW7 1NS
Application type
Removal/Variation of a condition

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
  • Tree Preservation Order: Ref TRE/HE/3Part of the site
  • Green belt: Barnet
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (21)

flood storage areas, conservation areas, listed buildings, 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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