Planning application
20 Marion Avenue Shepperton TW17 8AY
Works: Extension 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 loft conversion facilitated by a rear, partial hip-to-gable extension the insertion of 2 no. flank dormers and the insertion of 1 no. rooflight in flank roof slope and 1 no. rooflight in rear roof slope.
As published by the council, reference 25/01385/CPD
Application record
- Reference
- 25/01385/CPD
- Type
- Cert. of Lawful Proposed Use and Dev
- Status
- Decided
- Decision
- Granted As published: Grant Cert Lawful Prop Use/Dev
- Received
- 17 Nov 2025
- Validated
- 17 Nov 2025
- Decided
- 9 Jan 2026
- Ward
- Shepperton Town
- Parish
- Laleham And Shepperton ED
- Decision by
- Delegated Decision
- Postcode
- TW17 8AY
Site history
Applications at this address on the Spelthorne register
This site has had 2 applications since 2024: 2 approved, 0 refused.
-
24/01312/HOU Granted
20 Marion Avenue Shepperton TW17 8AY
Erection of a single storey side extension and single storey rear extension, following removal of existing conservatory.
Timeline
Dates from the published record
-
17 Nov 2025
Received by Spelthorne
-
9 Jan 2026
Decision issued: Grant Cert Lawful Prop Use/Dev
-
11 Aug 2026
Added to PlanIndex
Related applications
Cases linked to this one on the register
- Application: 24/01312/HOU (Decided (Approved))
Who's behind it
Company information only, from the register and Companies House
G B Services Agent, registered in Rickmansworth
Dissolved · incorporated 1994 · Rickmansworth
21 applications on PlanIndex · across 11 councils · 90% granted
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
14 documents on file for this application
- CPCPDZ CERT PROPOSED DEV
- DELEGATED REPORT UPDATED 24.6.20
- ACKCPD ACK LETTER CPD
- APPLICATIONFORMREDACTED
- FEECALCULATION
- ATTACHMENTSUMMARY
- EXISTING GROUND FLOOR PLAN
- EXISTING LOFT & ROOF PLAN
- PROPOSED LOFT & ROOF PLAN
- EXISTING ELEVATIONS
- PROPOSED ELEVATIONS
- PROPOSED BLOCK PLAN
- LOCATION PLAN
- FORM_1_CIL_ADDITIONAL_INFORMATION
Watch members (£5 a month) open the document list from here.
Open the documentsWhat this grant of permission means
Spelthorne granted permission on 9 January 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About lawful development applications
A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
20 Marion Avenue Shepperton TW17 8AY
Erection of a single storey side extension and single storey rear extension, following removal of existing conservatory.
Granted Householder Extension 20 docsSmall domestic -
11 Marion Avenue Shepperton TW17 8AY
Certificate of Lawfulness for the proposed development for a hip to gable conversion and a side roof dormer (As shown on plans: MARR1 SMART 00 ZZ DR A 3601 rev P01; MARR1 SMART 00 ZZ DR A 3001 rev P01; MARR1 SMART 00 ZZ DR A 0001 rev P01 received 26.11.2024)
Granted Lawful development Loft or dormer 9 docs -
11 Marion Avenue Shepperton TW17 8AY
Prior Approval Notification for a single storey rear extension extending 4.6 metres beyond the rear wall of the original house, with a maximum height of 3.6 metres and a height of 2.9 metres to the eaves (As shown on plans: MARR1-SMART-00-ZZ-DR-A-0001 rev P01; MARR1-SMART-00-ZZ-DR-A-3001 rev P01; MARR1-SMART-00-ZZ-DR-A-3601 rev P01 received 26.11.2024)
Granted Prior approval Extension 9 docsSmall domestic -
31 Lois Drive Shepperton TW17 8BD
The erection of single storey rear extension following the demolition of existing conservatory, a single storey infill extension, and loft conversion and extension including rear facing dormer and the incorporation of roof lights (amendment to previously approved application 22/01015/HOU)
Granted Householder Extension Loft or dormer +1 10 docsSmall domestic -
33 Laleham Road Shepperton TW17 8EQ
Roof extension comprising hipped to gable roof alterations to front and rear, installation of side dormer erection of single storey side extension.
Granted Householder Extension Loft or dormer +1 25 docsSmall domestic -
11 Old Charlton Road Shepperton TW17 8AX
Certificate of Lawfulness for the proposed loft conversion facilitated by a hip to gable extension and installation of rear dormer. 2 no. rooflights on front roof slope and 1 no. flank window in roof.
Granted Lawful development Extension Loft or dormer +1 10 docs
Other lawful development applications
In Spelthorne
-
26/00916/CPD Awaiting decision
9 Alexandra Road Ashford TW15 1TW
Certificate of Lawfulness for proposed conversion of roof space into habitable room, to include a rear dormer and conversion of roof from hip to gable end and 2 no roof lights on front of roof.
-
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.