9 Avondale Avenue Staines-upon-Thames TW18 2PT Data via plota.co.uk
Proposal
Certificate of Lawfulness for proposed development for a garage conversion to habitable accommodation facilitated by replacement of existing garage door with UPVC double glazed windows and replacement of existing garage roof and installation of x2 Velux roof windows in main house roof and installation of new window in rear gable wall and internal alterations Data via plota.co.uk
Application progress
Under consideration
No decision has been issued yet. Plota predicts a decision around 11 Nov 2026, from Spelthorne's recent extensions.
Documents 3
Application forms 1
Other documents 2
Site constraints 3
Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, the Planning Inspectorate 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.
Building
From the energy performance certificate lodged in September 2025, the latest held for this property. The building may have changed since. View the certificate
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Important details
- Council
- Spelthorne
- Application type
- Cert. of Lawful Proposed Use and Dev
- Postcode
- TW18 2PT
- Received
- 17 Sept 2026
- Validated
- 17 Sept 2026
- Ward
- Riverside And Laleham
- Parish
- Staines ED
- Case officer
- Show
- Target decision
- 12 Nov 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- Rkitek Design Ltd
Decision outlook
Day 22 of the 56-day target. Spelthorne usually decides extensions by day 55.
Plota live figures for extensions decided by Spelthorne in the last twelve months, from validation. Spelthorne decision record →
Public comments
No public comments yet.
Last counted 2 Oct 2026
Consultation & key dates
- Alt. reference
- PP-15231100
- Planning Portal ref
- PP-15231100
- Comments by
- 21 Oct 2026
- Site or press notice
- 30 Sept 2026
- Statutory expiry
- 12 Nov 2026
- Env. assessment
- No
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
Nearby activity
Spelthorne ranks #124 out of 296 councils for householder decision speed. Householder applications are slightly less likely to be approved here (88%) than the national average (90%).
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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9 Avondale Avenue Staines-upon-Thames TW18 2PT
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Comments are open until 21 Oct 2026