498-505, Ipswich Road, Slough, SL1 4EP

This site has had 6 applications since 2023: 2 approved, 1 refused.

• P/20401/005 Granted

  498-505, Ipswich Road, Slough, SL1 4EP

  Application under Section 73 of the Town and Country Planning Act 1990 (as amended) to vary condition no.2 (approved plans and drawings) and add condition 17 (boundary treatment) of planning application P/20401/000 dated 31/05/2024 for development of a new 132/33kv electrical substation including 2 no. Switchroom buildings and 4 no. Transformers, associated onsite cable-laying and groundworks

  Decided 29 May 2026 Full applications
• P/20401/003 Refused

  498-505, Ipswich Road, Slough, SL1 4EP

  Submission of details pursuant to condition 6 (Surface Water Drainage Scheme) and condition 7 (Surface Water Drainage System – Detailed Ownership and Maintenance Scheme (OMS)) of planning permission P/20401/000 dated 31/05/2024.

  Decided 23 Dec 2025 Conditions
• P/20401/002 Decided

  498-505, Ipswich Road, Slough, SL1 4EP

  Submission of details pursuant to condition 9 (Construction Environmental Management (CEMP)) of planning permission P/20401/000 dated 31/05/2024.

  Decided 14 Nov 2025 Conditions
• P/20401/001 Decided

  498-505, Ipswich Road, Slough, SL1 4EP

  Submission of details pursuant to conditions 3 (Intrusive Investigation Method Statement (IIMS) 4 (Quantitative Risk Assessment (QRA) of planning permission P/20401/000 dated 31/05/2024

  Decided 29 Aug 2025 Conditions
• P/20401/000 Granted

  498-505, Ipswich Road, Slough, SL1 4EP

  Development of a new 132/33KV electrical substation including 2 no. switchroom buildings and 4 no. transformers, associated onsite cable-laying and groundworks.

  Decided 31 May 2024 Full applications

1. 13 Nov 2025

   Received by Slough

2. 23 Jan 2026

   Decision issued: Conditions Complied With; Informatives

3. 25 Jul 2026

   Added to PlanIndex

Slough has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.

This application deals with conditions on an existing permission, supplying the details a condition requires or asking to vary or remove one, without reopening the permission itself. More in our guide to planning application types.

• SEGRO, 535-546 Ipswich Road, Slough, SL1 4EP

  t/131 Submitted 7 Feb 2018 50 yards away

  Detached data centre building (One 5,063.1 sqm building) for B1(B), B1(c), B2, B8 and/or Colocation/data centre (Sui Generis) uses.

  Granted

• Unit 2, 560 Ipswich Road, Slough Trading Estate, Slough, SL1 4EP

  P/01745/002 Submitted 15 Nov 2017 50 yards away

  Advertisement consent to display 6no. non-illuminated signs consisting of 2 no. fascias, 2 no. entrance architraves, and 2 no. directional signs.

  Granted Advertising 2 docs

• Street Record, Ipswich Road, Slough, SL1 4EP

  P/19720/001 Submitted 6 Apr 2022 50 yards away

  Submission of details pursuant to conditions 3 (measures to protect trees) & 4 (boundary treatment) of planning permission P/19720/000 dated 11/02/2022 for Change of Use to B8 Storage and Distribution with open storage (to provide a railway maintenance depot).

  Decided Conditions Trees 5 docs

• Electricity Sub Station, Ipswich Road, Slough, SL1 4EP

  P/20401/007 Submitted 13 Feb 2026 50 yards away

  Submission of details pursuant to condition 4 (Quantitative Risk Assessment) of planning permission P/20401/000 dated 31/05/2024

  Decided Conditions

• 498-505, Ipswich Road, Slough, SL1 4EP

  P/20401/002 Submitted 5 Sep 2025 50 yards away

  Submission of details pursuant to condition 9 (Construction Environmental Management (CEMP)) of planning permission P/20401/000 dated 31/05/2024.

  Decided Conditions 3 docs

• 498-505, Ipswich Road, Slough, SL1 4EP

  P/20401/003 Submitted 24 Oct 2025 50 yards away

  Submission of details pursuant to condition 6 (Surface Water Drainage Scheme) and condition 7 (Surface Water Drainage System – Detailed Ownership and Maintenance Scheme (OMS)) of planning permission P/20401/000 dated 31/05/2024.

  Refused Conditions 3 docs

• P/02114/030 Awaiting decision

  Powerleague Fives Ltd & Slough and Eton Church of England Business & Enterprise College, Ragstone Road, Slough, SL1 2PU

  Submission of details of condition 4 (Biodiversity Net Gain) pursuant to planning permission P/02114/028 dated 16/06/2026

  Received 7 Oct, published by the council 12 Oct 2026 Conditions
• P/02411/036 Split decision

  Thames Central, Hatfield Road, Slough, SL1 1QE

  Submission of details pursuant to condition 3 (New finishes to building works) & 5 (Construction Management Plan) of planning permission P/02411/022 dated 23/11/2022

  Received 14 Oct, published by the council 25 Jul 2026 Conditions
• P/20551/002 Awaiting decision

  160, Bath Road, Slough, SL1 3XE

  Submission of details pursuant to condition 4 (Boundary Treatment), 7 (Gates) and 8 (Secured By Design) of planning permission P/20551/000 dated 12/03/2026

  10 Sep 2026 Conditions
• P/00094/130 Awaiting decision

  Horlicks Factory, Stoke Poges Lane, Slough, SL1 3NW

  Submission of details pursuant to condition 25 (Managment & Maintenance of Surface Water) 36 (Foul Drainage) of planning permission P/00094/092 dated 08/08/2024

  10 Sep 2026 Conditions
• P/00094/129 Awaiting decision

  The Horlicks Factory, Stoke Poges Lane, Slough, SL1 3NW

  Submission of details pursuant to condition 14 (Architectural details outline components) of planning permission P/00094/092 dated 08/08/2024

  Received 9 Sep, published by the council 10 Sep 2026 Conditions