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Planning application

UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

Granted Hillingdon 49261/APP/2026/985 Full

Works: Demolition

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

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.)

As published by the council, reference 49261/APP/2026/985

Application record

Reference
49261/APP/2026/985
Type
Full
Status
Approval
Decision
Permitted
Received
20 Apr 2026
Validated
20 Apr 2026
Decided
9 Jun 2026
Ward
HAYES TOWN 2022

Site history

Applications at this address on the Hillingdon register

This site has had 6 applications since 2026: 3 approved, 0 refused.

  • 49261/APP/2026/2094 Awaiting decision

    UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

    Details pursuant to the discharge of Condition 25 (Air Quality Assessment) 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.)

    Submitted 25 Aug 2026
  • 49261/APP/2026/1445 Awaiting decision

    UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

    Details pursuant to the discharge of Condition 19 (Detailed Landscape Scheme) 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.)

    Submitted 10 Jun 2026
  • 49261/APP/2026/1013 Granted

    UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

    Details pursuant to the discharge of Condition 20 (Flood Risk Assessment and Drainage Strategy) 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.)

    Decided 26 Jun 2026 Full applications
  • 49261/APP/2026/964 Awaiting decision

    UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

    Details pursuant to the discharge of Condition 17 (Materials) and Condition 18 (Living Walls) 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.)

    Submitted 16 Apr 2026
  • 49261/APP/2026/763 Granted

    UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

    Details pursuant to the discharge of Condition 15 (Low Emission Strategy) and Condition 16 (Construction and Demolition Management and Logistics Plan) 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.)

    Decided 15 May 2026 Full applications

Timeline

Dates from the published record

  1. 20 Apr 2026

    Received by Hillingdon

  2. 9 Jun 2026

    Decision issued: Permitted

  3. 12 Aug 2026

    Added to PlanIndex

Documents

Plans, drawings, consultee responses and the officer's report

4 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Trade members open them from here.

Open the documents

What this grant of permission means

Hillingdon granted permission on 9 June 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

In Hillingdon

  • 80149/APP/2026/1572 Granted

    14 LADYGATE LANE RUISLIP HA4 7QU

    Erection of single storey side and rear wraparound extension, a front porch, amendments to fenestration and roof lights to the front, side and rear sloped roof, following the removal of the rear chimney and garden shed. (Description Amended)

    24 Jun 2026 Full applications
  • 79879/APP/2026/1749 Granted

    21 NORTH AVENUE HAYES UB3 2JE

    Erection of part single storey, part double storey rear extension

    13 Jul 2026 Full applications
  • 74889/APP/2026/1363 Granted

    32 MANOR ROAD HAYES UB3 2DG

    Erection of a first-floor rear extension.

    1 Jun 2026 Full applications
  • 53073/APP/2026/1645 Granted

    50 MINET DRIVE HAYES UB3 3JW

    Erection of a part single storey, part two storey extension to the rear

    1 Jul 2026 Full applications
  • 80172/APP/2026/1717 Refused

    6 SQUIRRELS TRADING ESTATE VIVEASH CLOSE HAYES UB3 4RZ

    Change of use from Class B8 to Class E retail

    8 Jul 2026 Full applications