Westchase Sunning Avenue Sunningdale Ascot SL5 9PW Data via plota.co.uk
Proposal
Single storey rear extension, 1no. side dormer, raising of the existing terrace and 1no. detached outbuilding ancillary to the main dwelling following the removal of the existing elements. Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicted a decision around 10 Oct 2026; it is now day 68.
Documents 8
Statements & assessments 4
Application forms 2
Consultation & comments 1
Other documents 1
Site constraints 1
Checked on 6 October 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.
Sales history 2
Last sold for £1,250,000 in January 2007. Detached house, freehold.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
Building
From the energy performance certificate lodged in April 2009, the latest held for this property. The building may have changed since. View the certificate
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Important details
- Council
- Windsor and Maidenhead
- Application type
- Full
- Postcode
- SL5 9PW
- Received
- 21 Jul 2026
- Validated
- 3 Aug 2026
- Ward
- Sunningdale And Cheapside
- Parish
- Sunningdale Parish
- Case officer
- Show
- Target decision
- 12 Oct 2026
- Applicant
- Show
- Agent
- Show
Decision outlook
Day 68, past the statutory target. 95% of extensions in Windsor and Maidenhead are decided within thirteen weeks, which runs to 2 Nov 2026; extensions of time are common, and the council need not decide on the day. Last seen undecided on 8 Oct 2026.
Plota live figures for extensions decided by Windsor and Maidenhead in the last twelve months, from validation. Windsor and Maidenhead decision record →
Consultation & key dates
- Alt. reference
- PP-15099271
- Planning Portal ref
- PP-15099271
- Comments by
- 31 Aug 2026
- Statutory expiry
- 27 Sept 2026
- Env. assessment
- No
Historical activity at this location
22 nearby applications on record - archival context, not part of the live application.
Nearby activity
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.
Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use
Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.
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Westchase Sunning Avenue Sunningdale Ascot SL5 9PW
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The consultation period closed on 31 Aug 2026.