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20 Kinnaird Avenue, Chiswick, London, W4 3SH

P/2026/0639Lawful Development Certificate (Proposed)Refused
Outline / PiP

Refused on 21 April 2026

Council decision: LAWFNOTGRANT

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

Certificate of lawfulness for the proposed erection of a single storey rear infill extension to the house.

Received
24 February 2026
Ward
Chiswick Homefields
  1. Received24 Feb
  2. Validated24 Feb
  3. Consult.24 Feb
  4. Target
  5. Decided21 Apr

Decided in 56 days (council typically 56)

About this application

This is an outline application for an extension at 20 Kinnaird Avenue, Chiswick, London, W4 3SH. Hounslow has handled 1,060 applications of this type. This one was decided in 56 days. The site is in the Grove Park conservation area. There has been 1 other application at this address. In the past year there have been 324 applications across Chiswick Homefields. We hold 6,639 applications in total for the W4 postcode area.

82% of outline 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 3SH
Application type
Lawful Development Certificate (Proposed)
Scale / size
Small

Planning application dates

Date validated
24 February 2026
Consultation expiry
24 February 2026
Consultation end
24 February 2026
Application expires
21 April 2026

Planning decision

Statutory period
56 days

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)
  • Conservation area: Grove Park
  • 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 (21)

flood storage 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.

Planning history at this site

1 other application at this property, newest first.

  1. 2026
    30 Apr

    Erection of a part single storey rear extension to the house

    ApprovedHouseholderP/2026/1318

Source: Hounslow

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

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