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20 Compton Crescent, Chiswick, London, W4 3JA

P/2025/3736Lawful Development Certificate (Proposed)Approved
Outline / PiP

Approved on 24 February 2026

Council decision: GRANT

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 rear outrigger roof extension to the house

Received
17 December 2025
Ward
Chiswick Riverside
  1. Received17 Dec
  2. Validated22 Dec
  3. Consult.22 Dec
  4. Target
  5. Decided24 Feb

Decided in 64 days (council typically 56)

About this application

This is an outline application for an extension at 20 Compton Crescent, Chiswick, London, W4 3JA. Hounslow has handled 1,060 applications of this type. This one was decided in 69 days, 13 days longer than Hounslow's typical decision time. There has been 1 other application 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.

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.Planning something similar? See what gets approved on your street

Application details

Postcode
W4 3JA
Application type
Lawful Development Certificate (Proposed)
Scale / size
Small

Planning application dates

Date validated
22 December 2025
Consultation expiry
22 December 2025
Consultation end
22 December 2025
Application expires
16 February 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)
  • 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.

Associated applications

  1. 2025
    17 Dec

    Certificate of lawfulness for the proposed erection of a rear outrigger roof extension to the house

    This applicationApprovedOutlineP/2025/3736
  2. 2025
    17 Dec

    Erection of a single storey rear infill extension to the house

    ApprovedHouseholderFiled alongsideP/2025/3738

Source: Hounslow

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

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