Header House Imperial College Silwood Park Buckhurst Road Ascot SL5 7PY Data via plota.co.uk

26/00131/CONDIT - Discharge of Condition Approved
Admin / proceduralCommercial & major worksDemolitionSolar & renewablesCommercial premises

Proposal

Details required by Condition 4 (Photovoltaic panels) and 7 (Biodiversity enhancements) of planning permission for the Erection of a new modular research facility with solar panels following demolition of existing building. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
19 Jan 2026
✓
Approved
12 Mar 2026

Approved on 12 Mar 2026 · Delegated · Last checked 7 Jul 2026

Documents 8

Decision & officer reports 1

PDF Conditions approval Councils Decision · 12 Mar 2026 View ↗

Statements & assessments 1

PDF Ecology comment Consultee - Comments · 11 Feb 2026 View ↗

Other documents 6

PDF History log Property History · 20 Jan 2026 View ↗ PDF Applicationformredacted Application Forms · 19 Jan 2026 View ↗ PDF Solis three phase inverters datasheet Supporting Information - General · 19 Jan 2026 View ↗ PDF Solar panel datasheet Supporting Information - General · 19 Jan 2026 View ↗ PDF Photovoltaic panel ongoing maintenance requirements Supporting Information - General · 19 Jan 2026 View ↗ PDF Condition 4 and 7 discharge - cover letter Correspondence - General · 19 Jan 2026 View ↗

All documents on the council site ↗

Associated applications 3

Site constraints 4

Green belt: London
Inappropriate development needs very special circumstances.
Green belt policy allows a short list of exceptions, such as limited extensions and replacement buildings. Anything else needs very special circumstances that clearly outweigh the harm. Some green belt land can count as grey belt, where it does not strongly serve the green belt's purposes. The council decides this in its green belt assessment or on each application, so we do not mark it here.
Read the government guidance ↗
Habitat network: Restorable Habitat
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
2 listed buildings within 150 m of the postcode pin; Inside the Ascot and Sunningdale built-up area.
Not affected
Outside flood zones 2 and 3 · No scheduled monument at the site

Checked on 6 October 2026. The pin for this application is the centre of its postcode rather than the building, so distances to nearby designations are measured from the postcode and can be out by the width of the postcode area. Historic England, the Environment Agency, Natural England and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

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Other new applications on this street

17 Jul 2026Pending

Imperial College Silwood Park Buckhurst Road Ascot SL5 7PY

Installation of photovoltaic panels on the Hamilton Building and Centre for Popu...

26/01758/FULL
22 Sept 2026Pending

Firs Croft Buckhurst Road Ascot SL5 7RS

Alterations to fenestration to include 3 No. Juliet balconies.

26/02324/FULL

Nearby new applications

21 Sept 2026Pending

Tittenhurst London Road Sunninghill Ascot SL5 0PN

Details required by Condition 3 (Materials) of planning permission 25/02956/FULL...

26/02307/CONDIT
21 Sept 2026Pending

Tittenhurst London Road Sunninghill Ascot SL5 0PN

Details required by Condition 4 (Doors) of listed building consent 25/02957/LBC ...

26/02309/CONDIT
21 Sept 2026Pending

Tittenhurst London Road Sunninghill Ascot SL5 0PN

Details required by Condition 3 (Materials) of listed building consent 25/02957/...

26/02308/CONDIT
11 Sept 2026Pending

Tittenhurst London Road Sunninghill Ascot SL5 0PN

Details required by condition 5 (photovoltaic panels) 6 (surface water drainage ...

26/02250/CONDIT
26 Aug 2026Pending

Welton London Road Sunninghill Ascot SL5 0PH

Variation (under Section 73) of Condition 5 (Sustainable Drainage); Condition 7 ...

26/02109/VAR
17 Jul 2026Pending

Imperial College Silwood Park Buckhurst Road Ascot SL5 7PY

Installation of photovoltaic panels on the Hamilton Building and Centre for Popu...

26/01758/FULL

Important details

Council
Windsor and Maidenhead
Application type
Discharge of Condition
Postcode
SL5 7PY
Received
19 Jan 2026
Validated
19 Jan 2026
Ward
Sunningdale And Cheapside
Parish
Sunninghill And Ascot Parish
Case officer
Show
Target decision
16 Mar 2026
Decision
Approve Discharge of Condition
Decision date
12 Mar 2026
Decision level
Delegated
Applicant
Show
Agent
Show

Consultation & key dates

Alt. reference
PP-14630339
Planning Portal ref
PP-14630339
Statutory expiry
16 Mar 2026
Env. assessment
No

Historical activity at this location

9 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2024 Approved
Erection of a new modular research facility with solar panels following demolition of exi…
24/01557/FULL
2024 Approved
Prior notification for the demolition of Header House.
24/01365/DEM
Within ~100m

Nearby activity

2025
Refectory Bungalow Imperial College Silwood Park London Road Sunninghill Ascot SL5 7PZ
Replacement refectory building with solar panels to the roof, central courtyard, pergola…
25/02315/FULL
2024 Approved
Imperial College Silwood Park Buckhurst Road Ascot SL5 7PY
Lees House - External lift shaft to south west elevation, alterations to fenestration and…
24/01158/FULL
2023 Approved
Munro Building Imperial College Silwood Park Buckhurst Road Ascot
The installation of 6no. external ducts to the existing roof 2no. louvres at first floor…
23/03179/FULL
2023 Approved
Imperial College Silwood Park Buckhurst Road Ascot SL5 7PY
Prior notification for the demolition of 4no. greenhouses.
23/02911/DEM
2020 Approved
Imperial College Silwood Park Buckhurst Road Ascot SL5 7PY
The installation of 2 no. electricity substations.
20/01377/FULL
2017 Approved
Research Laboratories Adjacent Greenhouses Imperial College Silwood Park Buckhurst Road Ascot
Non material amendment to planning permission (16/02245/FULL) for the replacement of a po…
17/00878/NMA
2016 Approved
Research Laboratories Adjacent Greenhouses Imperial College Silwood Park Buckhurst Road Ascot
Erection of additional research building and associated storage buildings
16/02245/FULL
Windsor and Maidenhead
Planning Authority Score
5.3/10
Average
#135 of 296 councils
Relevant to this application:
Householder decisions

Windsor and Maidenhead is faster than most councils at deciding householder applications, ranking #82 out of 296. Only 28% of applications have the time limit extended, well below the 41% national average - the council usually decides on time. Windsor and Maidenhead is also one of the strictest councils - it refuses more householder applications than almost any other, with only 74% approved vs 90% nationally.

One of the strictest councils
only 74% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Windsor and Maidenhead decision statistics
Based on MHCLG data, the year to March 2026
72%
Overall approval rate
Below avg (87%) #293 of 296
74%
Householder approved
Below avg (90%) #294 of 296
75%
Decided in 8 weeks
Above avg (63%) #82 of 296
28%
Extended time limit
Below avg (41%) #47 of 296
44%
Minor dwellings approved
156 decided (1-9 homes)
96%
Major dwellings approved
27 decided (10+ homes)
64%
Change of use approved
25 decided
1,530
Total decisions
434 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings