Colne Valley Viaduct, Wetlands Ecological Mitigation Site Harvil Road Harefield
Approved on 11 March 2026
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
Request for approval of Plans and Specifications for reconfiguration of previously approved works within the Colne Valley Viaduct Groundworks South Area 1, on land predominantly alongside Dews Lane and contained between Harvill Road to the east, the Chiltern Railway line to the south and Harefield No.2 Lake to the west, in accordance with Paragraphs 2 and 3 of Schedule 17 to the High Speed Rail (London - West Midlands) Act 2017.
- Received
- 7 January 2026
- Council
- London Borough of Hillingdon
- Ward
- ICK/HAM & S HF/D 22
- ReceivedReceived7 Jan
- ValidatedValidated7 Jan
- Consult.Consultation
- TargetTarget Date11 Mar
- DecidedDecided11 Mar
Decided in 63 days (council typically 56)
About this application
This is a full planning application at COLNE VALLEY VIADUCT, WETLANDS ECOLOGICAL MITIGATION SITE HARVIL ROAD HAREFIELD. Hillingdon has handled 4,983 applications of this type. This one was decided in 63 days, 7 days longer than Hillingdon's typical decision time. There have been 3 other applications at this address. In the past year there have been 181 applications across ICK/HAM & S HF/D 22.
87% of full applications at London Borough of Hillingdon 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
- Application type
- Full
- Scale / size
- Medium
Planning application dates
- Date validated
- 7 January 2026
- Target decision date
- 11 March 2026
Applicant and agent
- Agent address
- Mr Ben Hampson South Portal Chalfont Lane Maple Cross WD3 9XN
Planning decision
- Statutory period
- 63 days
Additional information
- Documents
- 17
Site constraints
Designations that overlap or adjoin the site outline.
- Flood zone 3: High probability (rivers and sea)Part of the site
- Article 4 direction: Residential extensions
- Green belt: Hillingdon
Possibly incomplete for this council: tree preservation orders.
Also checked, none recorded (21)
flood storage areas, conservation areas, listed buildings, 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
3 other applications at this property, newest first.
- 202629 Jan
Request for agreement of a Site Restoration Scheme on land parcels to the south of Moorhall Road, in…
ApprovedFull73263/APP/2026/250 - 202629 Jan
Request for approval of Plans and Specifications for works within the Colne Valley Viaduct Groundworks South…
ApprovedFull73263/APP/2026/251 - 202321 Dec
Request for approval of plans and specifications secured under condition imposed by Schedule 17 to the High…
ApprovedFull73263/APP/2023/3694
Source: Hillingdon
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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