Planning application
11 Tanglyn Avenue Shepperton TW17 0AD
Works: Loft or dormer
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Certificate of Lawfulness for the proposed development of a loft conversion to include the installation of a rear facing dormer.
As published by the council, reference 25/01284/CPD
Application record
- Reference
- 25/01284/CPD
- Type
- Cert. of Lawful Proposed Use and Dev
- Status
- Decided
- Decision
- Grant Cert Lawful Prop Use/Dev
- Received
- 22 Oct 2025
- Validated
- 22 Oct 2025
- Decided
- 4 Dec 2025
- Ward
- Laleham And Shepperton Green
- Parish
- Laleham And Shepperton ED
- Decision by
- Delegated Decision
- Postcode
- TW17 0AD
Timeline
Dates from the published record
-
22 Oct 2025
Received by Spelthorne
-
4 Dec 2025
Decision issued: Grant Cert Lawful Prop Use/Dev
-
11 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Agent on file, a design practice registered in Sunbury-On-Thames
90 applications on PlanIndex · across 8 councils · 96% granted
Trade members see who it is, their full track record, and every application they have filed.
See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
9 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Trade members open them from here.
Open the documentsWhat a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
About lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
-
5 Tanglyn Avenue Shepperton TW17 0AD
Erection of a part two storey, part single storey side and rear extension
Granted Householder Extension 7 docsSmall domestic -
26 Tanglyn Avenue Shepperton TW17 0AE
Erection of a single storey rear extension (following demolition of existing conservatory)
Granted Householder Extension Demolition 10 docsSmall domestic -
Grassed Verge Of Southwest Side Of Laleham Road Shepperton Surrey TW17 0AH
86% historically approved · decision due ~22 Oct
The proposed works comprise the installation of a 20m monopole supporting 6 no. antennas, 2 no. 300mm transmission dishes and 3 no. equipment cabinets and ancillary development there to including 3 no. remote radio heads (RRHs).
Awaiting decision 20 docs -
11 Acacia Avenue Shepperton TW17 0AZ
Erection of double side extension and part single / part two storey rear extension and conversion into 2 flats
Granted Full applications New dwelling Extension 17 docsSeveral homes -
11 Acacia Avenue Shepperton TW17 0AZ
Certificate of Lawfulness for the proposed change of use from a C3 dwellinghouse to a 5 person (C4) HMO. Associated internal alterations.
Granted Lawful development 8 docsDomestic -
11 Acacia Avenue Shepperton TW17 0AZ
Erection of double side extension and single storey rear extension.
Granted Householder Extension 10 docsSmall domestic
Other lawful development applications
In Spelthorne
-
26/00452/CLD Granted
177A Feltham Road Ashford TW15 1BB
Certificate of Lawfulness for existing use of the ground floor flat as a small HMO (Use Class C4)
-
26/00200/CLD Granted
73 Nursery Gardens Staines-upon-Thames TW18 1EL
Certificate of Lawfulness to establish the lawful use of the property is as a House in Multiple Occupation (Use Class C4) for up to six occupants. As shown on site location plan and block plan no EX-1003 and Pre-Existing Floor Plans (Page 01 of 02) and Existing Floor Plans (Page 02 of 02) received 27.02.2026.
-
26/00383/CPD Refused
13 Meadow Road Ashford TW15 1PL
Certificate of lawfulness for proposed change of use from a 6 Person HMO (Class C4) to a 7 Person HMO (Sui-Generis)
-
26/00437/CLD Refused
4 Sunmead Road Sunbury-on-Thames TW16 6PE
Certificate of Existing Lawfulness for the conversion of a C3 dwellinghouse to a C4 small 6-person HMO.
-
26/00575/CLD Refused
96 Groveley Road Sunbury-on-Thames TW16 7LB
Certificate of Lawfulness for an existing development and use for a ground floor rear extension, roof alterations including a rear roof dormer and a hip to gable conversion with insertion of rooflights, and use as a small HMO (use class C4)