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237-239 High Street Acton W3 9BY

260048FULFull ApplicationRefused
Full

Refused on 4 August 2026

Delegated (officer decision)1 reason 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

Part two-storey rear/side extension at No. 239 High Street; construction of mansard roof extension at Nos. 237 and 239 High Street to accommodate two self-contained residential flat (Use Class C3) and conversion of existing first floor, office space (Use Class E(g)(i)) to create one self-contained residential flat (no.239); alterations to fenestration on side and rear elevations, including installation of two additional windows on side elevation; provision of cycle and refuse storage

Received
7 January 2026
Decision level
Delegated (officer decision)
Ward
South Acton
  1. Received7 Jan
  2. Validated7 Jan
  3. Consult.10 Feb
  4. Target4 Mar
  5. Decided4 Aug

Decided in 209 days (council typically 56)

About this application

This is a full planning application for a side extension at 237-239 High Street Acton W3 9BY. Ealing has handled 3,938 applications of this type. This one was decided in 209 days, 22 weeks longer than Ealing's typical decision time. The site is in the Acton Town Centre conservation area, with 2 listed buildings nearby. There are no previous applications recorded at this address. In the past year there have been 155 applications across South Acton. We hold 1,741 applications in total for the W3 postcode area.

82% of full applications at London Borough of Ealing 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. Proposed Flat 5, by reason of its insufficient gross internal floor area, would fail to provide the minimum 50sqm required for a one-bedroom two-person dwelling. The proposed unit would provide approximately 45sqm of gross internal floor area and would therefore result in cramped and substandard living accommodation, to the detriment of the residential amenity of future occupiers. The proposal would therefore be contrary to Policies D3 and D6 of the London Plan (2021), Policies 3.5 and 7B of the Ealing Development Management DPD (2013), Policy DAA of Ealing's Local Plan (Regulation 22), the London Plan Guidance: Housing Design Standards (2023), and the National Planning Policy Framework (2025).

From the council's decision notice.

Application details

Postcode
W3 9BY
Application type
Full Application
Scale / size
Small

Planning application dates

Date validated
7 January 2026
Consultation expiry
27 May 2026
Consultation start
20 January 2026
Consultation end
10 February 2026
Target decision date
4 March 2026

Applicant and agent

Agent address
Flat 2 33 Manor Park Gardens Edgware HA8 7NB

Planning decision

Statutory period
56 days

Publicity

Last advertised
6 May 2026
Advertisement expiry
27 May 2026

Additional information

Planning Portal ID
PP-14595634
Comments
0
Documents
48
Constraints
9

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Acton Town Centre
  • Heritage at Risk Register: Acton Town Centre, Acton
  • Flood zone 1: Low probability (rivers and sea)

Not published by this council, so not checked: Article 4 directions and tree preservation orders. Ask the council if these matter.

Also checked, none recorded (20)

flood storage areas, listed buildings, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, 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: Ealing

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

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