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18A St Mary's Grove Chiswick London W4 3LL

P/2015/2472Full ApplicationsRefused
Full

Refused on 2 October 2015

Planning committee

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

Erection of a rear roof extension with front roof windows to the flat.

Received
5 June 2015
Decision level
Planning committee
Ward
Chiswick Riverside
  1. Received5 Jun
  2. Validated
  3. Consult.
  4. Target
  5. Decided2 Oct

Decided in 119 days (council typically 56)

About this application

This is a full planning application for an extension at 18A ST MARY'S GROVE CHISWICK LONDON W4 3LL. Hounslow has handled 2,372 applications of this type. This one was decided in 119 days, 9 weeks longer than Hounslow's typical decision time. There are no previous applications recorded at this address. In the past year there have been 153 applications across Chiswick Riverside. We hold 6,644 applications in total for the W4 postcode area.

76% of full applications at London Borough of Hounslow 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
W4 3LL
Application type
Full Applications
Scale / size
Small

Planning application dates

Validated
5 June 2015

Applicant and agent

Agent address
14 Devonshire Mews Chiswick London W4 2HA

Appeal

Appeal date
9 December 2015
Appeal result
Allowed
Appeal decision date
8 March 2016

Additional information

Documents
9

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Flood zone 3: High probability (rivers and sea)
  • Article 4 direction: Dwellinghouses (C3) to small HMOs (C4) - borough-wide Article 4 Direction

Possibly incomplete for this council: tree preservation orders.

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: Hounslow

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

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