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39 Cornwall Avenue London N3 1LG

25/3818/HSEHouseholder ApplicationApproved
Householder

Approved on 12 November 2025

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 rear extension. Conversion of the existing garage into habitable room, insertion of window to replace the garage door

Received
17 September 2025
Ward
West Finchley
Agent
Mehra Design Services
  1. Received17 Sep
  2. Validated17 Sep
  3. Consult.17 Oct
  4. Target12 Nov
  5. Decided12 Nov

Decided in 56 days (council typically 56)

About this application

This is a full planning application for a single storey rear extension at 39 Cornwall Avenue London N3 1LG. Barnet has handled 4,516 applications of this type. This one was decided in 56 days. There have been 2 other applications at this address. In the past year there have been 103 applications across West Finchley. We hold 1,017 applications in total for the N3 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

Application details

Postcode
N3 1LG
Application type
Householder Application
Scale / size
Small

Planning application dates

Date validated
17 September 2025
Consultation expiry
17 October 2025
Neighbour consultation start
19 September 2025
Neighbour consultation end
17 October 2025
Target decision date
12 November 2025

Applicant and agent

Agent
Mehra Design Services
Agent address
41 Summit Avenue London NW9 0TH

Planning decision

Statutory period
56 days

Additional information

Planning Portal ID
PP-14338367
Comments
0
Documents
9

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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