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Trehaven St Andrews Close London N12 8BA

25/4717/192Proposed Lawful Development CertificateApproved
Outline / PiP

Approved on 9 December 2025

Council decision: LawfulDelegated (officer decision)

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

Roof extension involving rear dormer window, 2no. front and 1no. rear and 1no. side facing rooflight

Received
25 November 2025
Decision level
Delegated (officer decision)
Ward
Totteridge & Woodside
  1. Received25 Nov
  2. Validated26 Nov
  3. Consult.
  4. Target21 Jan
  5. Decided9 Dec

Decided in 13 days (council typically 56)

About this application

This is an outline application for a dormer extension at Trehaven St Andrews Close London N12 8BA. Barnet has handled 2,167 applications of this type. This one was decided in 14 days, 6 weeks quicker than Barnet's typical decision time. There has been 1 other application at this address. In the past year there have been 139 applications across Totteridge & Woodside. We hold 795 applications in total for the N12 postcode area.

75% of outline 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
N12 8BA
Application type
Proposed Lawful Development Certificate
Scale / size
Small

Planning application dates

Date validated
26 November 2025
Target decision date
21 January 2026

Applicant and agent

Agent
The Loft Converter

Planning decision

Statutory period
56 days

Additional information

Planning Portal ID
PP-14516293
Comments
0
Documents
16

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/FI/15Part of the site · +1 more
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (22)

flood storage areas, conservation areas, listed buildings, 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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