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31 Sefton Avenue London NW7 3QB

25/3239/HSEHouseholder ApplicationApproved
Householder

Approved on 1 October 2025

Council decision: Approve subject to conditionsDelegated (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

First floor side extension. Roof extension involving hip to gable, rear dormer with glass balustrade for the juliette balcony and 3no. front facing rooflights. Changes to roof tiles and fenestration

Received
4 August 2025
Decision level
Delegated (officer decision)
Ward
Edgware
Agent
Greco + Rabin Architects
  1. Received4 Aug
  2. Validated4 Aug
  3. Consult.2 Sep
  4. Target29 Sep
  5. Decided1 Oct

Decided in 58 days (council typically 56)

About this application

This is a full planning application for a dormer extension at 31 Sefton Avenue London NW7 3QB. Barnet has handled 4,516 applications of this type. This one was decided in 58 days. There are no previous applications recorded at this address. In the past year there have been 94 applications across Edgware. We hold 1,044 applications in total for the NW7 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
NW7 3QB
Application type
Householder Application
Scale / size
Small

Planning application dates

Date validated
4 August 2025
Consultation expiry
2 September 2025
Neighbour consultation start
5 August 2025
Neighbour consultation end
2 September 2025
Target decision date
29 September 2025

Applicant and agent

Agent
Greco + Rabin Architects
Architect profile
GRECO + RABIN ARCHITECTS LIMITED
Agent address
1 Coxwell Boulevard London NW9 4AB

Planning decision

Statutory period
56 days

Additional information

Planning Portal ID
PP-14226068
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
  • 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.

Associated applications

  1. 2025
    19 Dec

    Non material amendment to planning permission 25/3239/HSE

    ApprovedNon-material amendmentAmendment25/5113/NMA
  2. 2025
    4 Aug

    First floor side extension. Roof extension involving hip to gable, rear dormer with glass balustrade for the…

    This applicationApprovedFull25/3239/HSE

Source: Barnet

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

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