The American School In Switzerland Coldharbour Lane Thorpe Surrey TW20 8TE Data via plota.co.uk
RU.26/0279
Decided
Proposal
Listed Building Consent for internal alterations to the first floor of Thorpe House to provide additional boarding to the students. Data via plota.co.uk
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View original council record ↗Last checked
Application progress
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Received
9 Mar 2026
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Decided
Decided on · Last checked 17 Aug 2026
Associated applications 3
Site constraints 5
Flood zone 2, rivers and sea
Medium chance: between a 1 in 100 and 1 in 1,000 annual chance from rivers, or 1 in 200 to 1 in 1,000 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Thorpe conservation area
Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
Inside the Staines-upon-Thames built-up area; the 1970s provisional farmland map had this area as grade 2, but it predates the buildings here and the current map does not class it as farmland.
Not affected
Not green belt · No scheduled monument at the site
Checked on 11 September 2026. 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
9 Jun 2026Pending
Cemex House Coldharbour Lane Thorpe Surrey TW20 8TD
Details pursuant to discharge Conditions 11 (SUDS verification), 13 (Verificatio...
29 Apr 2026Pending
TASIS Coldharbour Lane Thorpe Surrey TW20 8TE
Deed of Variation to the S106 related to planning permission RU.07/1153 to modif...
Nearby new applications
14 Aug 2026Pending
Yew Trees Village Road Thorpe Surrey TW20 8TP
T1: Sycamore - To pollard approximately 1 metre below previous pollard points du...
15 Jul 2026Pending
The American School In Switzerland Coldharbour Lane Thorpe Surrey TW20 8TE
Details pursuant to Discharge Condition 3 (Listed Building (Relocated Services a...
8 Jul 2026Pending
The American School In Switzerland Coldharbour Lane Thorpe Surrey TW20 8TE
Details pursuant to Discharge Condition 3 (Secondary Glazing Details) of applica...
24 Jun 2026Pending
The American School In Switzerland Coldharbour Lane Thorpe Surrey TW20 8TE
01 - Sycamore - Reduce overall size of crown by 2.5m 01 - The works will reduce ...
24 Jun 2026Pending
The American School In Switzerland Coldharbour Lane Thorpe Surrey TW20 8TE
Listed Building Consent for internal maintenance and remedial works to Tudor Bar...
Historical activity at this location
50 previous applications on record - archival context, not part of the live application.
This property
Previous applications at this address
2025
Maintenance and remedial works to the external walls alongside Coldharbour Lane and facin…
2025
Maintenance and remedial works to the external walls alongside Coldharbour Lane and facin…
2025
Maintenance and remedial works to the external walls alongside Coldharbour Lane and facin…
2025
Maintenance and remedial works to the external walls alongside Coldharbour Lane and facin…
2025
Approved
Works to Trees in a Conservation Area: 148 - Hornbeam - cut back to clear play equipment…
2025
Approved
Works to Trees in a Conservation Area: 148 - Hornbeam - cut back to clear play equipment…
2025
Approved
Works to trees in a Conservation Area: Holm Oak - Reduce overall size of crown by 2m, rem…
2025
Approved
Works to trees in a Conservation Area: Holm Oak - Reduce overall size of crown by 2m, rem…
2024
Approved
Details pursuant to Discharge Conditions 5 (Tree Protection), 10 (Land Contamination) and…
2024
Approved
Details pursuant to Discharge Conditions 5 (Tree Protection), 10 (Land Contamination) and…
2024
Approved
481 - Sycamore - Remove the large stem nearest the building and reduce the rest of the la…
2024
Approved
481 - Sycamore - Remove the large stem nearest the building and reduce the rest of the la…
2024
Approved
Listed Building Consent for the removal of an existing window and reinstatement of a door…
2024
Approved
Full Planning for the removal of an existing window and reinstatement of a door into a hi…
2024
Approved
Listed Building Consent for the removal of an existing window and reinstatement of a door…
2024
Approved
Full Planning for the removal of an existing window and reinstatement of a door into a hi…
2024
Approved
02 Robinia - Carefully fell to near ground level. 02 - Due to a risk of failure over the…
2024
Approved
02 Robinia - Carefully fell to near ground level. 02 - Due to a risk of failure over the…
2024
Approved
01 - 3 x Magnolia - Reduce height to just below the black pipe, crown lift and cut back a…
2024
Approved
01 - 3 x Magnolia - Reduce height to just below the black pipe, crown lift and cut back a…
2022
Approved
Proposal for a glazed single storey extension to the Coach House at Thorpe House
2022
Approved
387 Holm Oak - Reduce overall size of crown by 2m
2022
Approved
387 Holm Oak - Reduce overall size of crown by 2m
2022
Approved
144 Aspen: - Fell remaining stem to near ground level. 146 Hornbeam - Remove east facing…
2022
Approved
144 Aspen: - Fell remaining stem to near ground level. 146 Hornbeam - Remove east facing…
Within ~100m
Nearby activity
2025
Approved
Blackhouse Coldharbour Lane Thorpe Surrey TW20 8TE
Trees T1, T3 and T4 - Ash reduce lateral branches by 1 to 2 metres to the boundary and re…
2025
Approved
Blackhouse Coldharbour Lane Thorpe Surrey TW20 8TE
Tree T1 - False Accacia reduce branches growing towards power line and property by 1 to 2…
2025
Approved
Blackhouse Coldharbour Lane Thorpe Surrey TW20 8TE
Trees T1, T3 and T4 - Ash reduce lateral branches by 1 to 2 metres to the boundary and re…
2025
Approved
Blackhouse Coldharbour Lane Thorpe Surrey TW20 8TE
Tree T1 - False Accacia reduce branches growing towards power line and property by 1 to 2…
2025
Approved
Manor Cottage Coldharbour Lane Thorpe TW20 8TE
Single storey extension following demolition of existing conservatory.
2025
Approved
Manor Cottage Coldharbour Lane Thorpe TW20 8TE
Single storey extension following demolition of existing conservatory.
2024
Withdrawn
The American School In England Coldharbour lane Thorpe Egham Surrey TW20 8TE
5 Day Notice
2024
Withdrawn
The American School In England Coldharbour lane Thorpe Egham Surrey TW20 8TE
5 Day Notice
2024
Approved
The American school in England Coldharbour Lane Thorpe Egham Surrey TW20 8TE
5 Day notice - Fell Dead Tree To Near Ground Level
2024
Approved
The American school in England Coldharbour Lane Thorpe Egham Surrey TW20 8TE
5 Day notice - Fell Dead Tree To Near Ground Level
2023
Approved
Blackhouse Coldharbour Lane Thorpe Surrey TW20 8TE
Listed Building consent for alteration works to return the three existing dwellings back…
2023
Approved
Blackhouse Coldharbour Lane Thorpe Surrey TW20 8TE
Alteration works to return the three existing dwellings back into a single family dwellin…
2023
Approved
Blackhouse Coldharbour Lane Thorpe Surrey TW20 8TE
Listed Building consent for alteration works to return the three existing dwellings back…
2023
Approved
Blackhouse Coldharbour Lane Thorpe Surrey TW20 8TE
Alteration works to return the three existing dwellings back into a single family dwellin…
2023
Approved
The American School In Switzerland, Cloisters Dormitory Coldharbour Lane Thorpe Surrey TW20 8TE
Proposed extension to the existing Cloisters Dormitory building at TASIS England to provi…
2023
Approved
The American School In Switzerland, Cloisters Dormitory Coldharbour Lane Thorpe Surrey TW20 8TE
Proposed extension to the existing Cloisters Dormitory building at TASIS England to provi…
2022
Approved
Manor Cottages Coldharbour Lane Thorpe Surrey TW20 8TE
Proposed demolition of existing single storey outbuilding, existing single storey rear co…
2022
Approved
Manor Cottages Coldharbour Lane Thorpe Surrey TW20 8TE
Proposed demolition of existing single storey outbuilding, existing single storey rear co…
2022
Approved
The American School In Switzerland, Coldharbour Lane Thorpe TW20 8TE
Application seeking Full Planning Permission for a proposed glazed single storey extensio…
2022
Approved
The American School In Switzerland, Coldharbour Lane Thorpe TW20 8TE
Application seeking Listed Building Consent for a proposed new timber structured glazed s…
2016
Approved
Tasis England Coldharbour Lane Thorpe TW20 8TE
Listed Building Consent for proposed revisions to the existing modern internal partitioni…
2016
Approved
Tasis England Coldharbour Lane Thorpe Surrey TW20 8TE
Proposed conversion of an existing attic area within a C1 building from storage area to s…
2016
Approved
TASIS Coldharbour Lane Thorpe Egham Surrey TW20 8TE
Works to one Sycamore tree within grounds of school, tree protected by TPO No. 64
2016
Withdrawn
Tasis England Coldharbour Lane Thorpe TW20 8TE
Internal alterations to the first and second floors of Thorpe House (Grade II* Listed bui…
2016
Approved
Tasis Coldharbour Lane Thorpe Egham Surrey TW20 8TE
Works to trees within TASIS Coldharbour Lane Thorpe trees protected by TPO No. 64 and a C…
Runnymede
Planning Authority Score
5.2/10
Average
#140 of 296 councils
Relevant to this application:
Householder decisions
Runnymede ranks #108 out of 296 councils for householder decision speed. Householder applications are slightly less likely to be approved here (89%) than the national average (90%).
These figures are council-wide context, not a prediction for this application.
View full council performance
Runnymede decision statistics
Based on MHCLG data, the year to March 2026
83%
Overall approval rate
Below avg (87%) #242 of 296
89%
Householder approved
Below avg (90%) #208 of 296
72%
Decided in 8 weeks
Above avg (63%) #108 of 296
36%
Extended time limit
Below avg (41%) #113 of 296
66%
Minor dwellings approved
74 decided (1-9 homes)
82%
Major dwellings approved
11 decided (10+ homes)
55%
Change of use approved
11 decided
661
Total decisions
110 refused in the year to March 2026
Track this application
The American School In Switzerland Coldharbour Lane Thorpe Surrey TW20 8TE
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