51 Swan Lane London N20 0PR
Refused on 17 July 2026
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
First floor rear extension with juliette balcony
- Received
- 27 May 2026
- Council
- London Borough of Barnet
- Ward
- Whetstone
- ReceivedReceived27 May
- ValidatedValidated27 May
- Consult.Consultation
- TargetTarget Date22 Jul
- DecidedDecided17 Jul
Decided in 51 days (council typically 56)
About this application
This is a full planning application for a rear extension at 51 Swan Lane London N20 0PR. Barnet has handled 4,516 applications of this type. This one was decided in 51 days, 5 days quicker than Barnet's typical decision time. There has been 1 other application at this address. In the past year there have been 61 applications across Whetstone. We hold 929 applications in total for the N20 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
- The proposed first floor rear extension, by reason of its excessive width, scale, bulk, design and roof form would result in a visually obtrusive, disproportionate and incongruous addition to the host property which fails to respect the character and appearance of the original dwellinghouse and relates unsympathetically to the original building, to the detriment of the character and appearance of the host property and the wider locality. The proposed development would therefore be contrary to Policy D3 of the London Plan (2021), Policies CDH01 and CDH05 of the Barnet Local Plan (Adopted March 2025) and the LB Barnet Sustainable Design and Development Guidance SPD (2026).
From the council's decision notice.
Application details
- Postcode
- N20 0PR
- Application type
- Householder Application
- Scale / size
- Small
Planning application dates
- Date validated
- 27 May 2026
- Consultation expiry
- 25 June 2026
- Target decision date
- 22 July 2026
Applicant and agent
- Agent
- Unique Designers
- Agent address
- 23 Crown Road Borehamwood WD6 5JJ
Planning decision
- Statutory period
- 56 days
Publicity
- Site notice start
- 4 June 2026
- Site notice end
- 25 June 2026
Site 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 2026-11-03. 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.
Planning history at this site
3 other applications at this property, newest first.
- 20263 Aug
First floor rear extension
ApprovedHouseholder26/2867/HSE - 202510 Mar
New front hardstanding and vehicular access to provide off-street parking. Installation of an electrical…
ApprovedHouseholder25/0993/HSE - 202527 Jan
Single storey rear extension with a proposed depth of 4.50m, maximum height of 2.85 metres and eaves height…
Not RequiredPrior Approval: Larger Home Extension25/0279/PNH
Source: Barnet
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Find contractors for extensions near this site- Orient Construction Consultancy LimitedVerifiedLondon7.1 mi
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- Kabilo LimitedVerifiedLondonExtensionsLoft Conversions8.0 mi
- Avent Roofing ServicesVerifiedWestminsterRoofing8.2 mi
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