UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

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/2026/1013 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/2026/985 Granted

  UNIT 4, SILVERDALE INDUSTRIAL ESTATE SILVERDALE ROAD HAYES

  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.)

  Decided 9 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

1. 10 Jun 2026

   Received by Hillingdon

2. 26 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 5 August 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Hillingdon took a median of 58 days over the applications it decided in the last year.

This application is with Hillingdon for determination, against a statutory target of eight weeks. Over the last year Hillingdon's median decision took 58 days. More in our guide to how long planning decisions take.

The published feed does not state which type of application this is; the register entry on Hillingdon's portal will say. Our guide explains the common types.