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Details pursuant to the discharge of Condition 21(i) (Contaminated Land) of planning permission ref. 49261/APP/2024/2904 dated 12-03-2026 (Demolition of the existing building and structures on site, and all other associated site clearance works. Construction of a data centre building (Class B8) with plant at roof level with an emergency generator (1no.) and associated flue (provided within an external compound adjoining the data centre building), sprinkler tank and pumphouse, security guard house, and provision of one kiosk substation and MV Building. The development also comprises the construction of a new access and internal road and circulation areas, footpaths, provision of car and bicycle parking, hard and soft landscaping and other associated works and ancillary site infrastructure.)

UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

ApprovalReference: 49261/APP/2026/985London Borough of Hillingdon

Last published check: 13 Oct 2026, 10:57. Check the council record for more recent changes.

Application timeline

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  1. Received

    Published milestoneCouncil source

  2. Validated

    Published milestoneCouncil source

  3. Decided

    Published milestoneCouncil source

  4. Decision By

    Past published deadline

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    Council source

Application summary

Status
Approval
Application type
Not published
Received
20 Apr 2026
Validated
20 Apr 2026
Determination deadline
15 Jun 2026
Local authority
London Borough of Hillingdon

Application overview

Details pursuant to the discharge of Condition 21(i) (Contaminated Land) of planning permission ref. 49261/APP/2024/2904 dated 12-03-2026 (Demolition of the existing building and structures on site, and all other associated site clearance works. Construction of a data centre building (Class B8) with plant at roof level with an emergency generator (1no.) and associated flue (provided within an external compound adjoining the data centre building), sprinkler tank and pumphouse, security guard house, and provision of one kiosk substation and MV Building. The development also comprises the construction of a new access and internal road and circulation areas, footpaths, provision of car and bicycle parking, hard and soft landscaping and other associated works and ancillary site infrastructure.)

Proposal details

Reference
49261/APP/2026/985
Ward
HAYES TOWN 2022
Agent
Mr Harry Payne The Minster Building 21 Mincing Lane London EC3R 7AG

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Application location

UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

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Documents 4 of 4

DocumentPublishedAction
ApplicationFormRedacted Application Form - Without Personal DataAPPLICATION FORM22 Apr 2026View
Remediation Strategy Silverdale Additional plansSUPPORTING INFORMATION22 Apr 2026View
DECISION NOTICEDECISION NOTICE9 Jun 2026View
OFFICERS REPORTSOFFICERS REPORTS9 Jun 2026View

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Decision & conditions

Approval
DECISION NOTICE
Planning conditions

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