Planning application
33 Onslow Avenue Cheam SM2 7ED
Works: Extension Loft or dormer Small domestic
Read from the description, not a valuation. How we read the register
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Retention of a front entrance porch, installation of rooflights to the single storey flank extension, alteration to the single storey rear extension roof detail, installation of an air source heat pump and two air conditioning units to ground floor rear elevation, alterations to front boundary treatment/forecourt and rear terrace with steps leading up to rear garden land, alteration to front, side and rear fenstrations and alteration to external finishes.
As published by the council, reference DM2025/01417
Application record
- Reference
- DM2025/01417
- Type
- Householder Application
- Status
- Application Granted
- Decision
- Application Granted
- Received
- 14 Nov 2025
- Validated
- 6 Jan 2026
- Decided
- 2 Mar 2026
- Ward
- Cheam
- Decision by
- Delegated Decision
- Postcode
- SM2 7ED
Timeline
Dates from the published record
-
14 Nov 2025
Received by Sutton
-
6 Jan 2026
Validated
Checked as complete and ready for consideration.
-
2 Mar 2026
Decision issued: Application Granted
-
13 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Agent on file, an architecture practice registered in Heathrow
53 applications on PlanIndex · across 22 councils · 93% 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
17 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 householder applications
How this application type works
Householder applications cover work to an existing house and its garden: extensions, loft and garage conversions, porches, outbuildings and similar alterations within the boundary of the home. They cannot be used to create a separate dwelling or change what the building is used for. Councils aim to decide them within eight weeks, and immediate neighbours are usually notified and given a chance to comment.
Nearby applications
Within 500 metres
-
33 Onslow Avenue Cheam SM2 7ED
Non material amendment to approved application DM2024/00527 which allowed the 'Erection of a single storey rear extension,' to allow for alterations to rear extension roof eaves and verge and installation of two air conditioning units to rear elevation.
Refused Amendments Extension 6 docsSmall domestic -
33 Onslow Avenue Cheam SM2 7ED
Non material amendment to approved application DM2023/01555 which allowed the 'Erection of a two-storey rear extension and conversion of existing garage into a habitable room, formation of a front entrance canopy and alterations to fenestration to all elevations, conversion of loft space, involving alterations to the existing roof line, increase of the ridge height of the main roof, two dormers to rear roofslope and a rooflight to front roofslope' to allow the formation of a front entrance porch, alterations to the front entrance door detail, alterations to fenestrations and external finish, installation of an air source heat pump to rear and installation of rooflights to ground floor flank utility room together with roof alterations.
Refused Amendments Extension Loft or dormer +2 6 docsSmall domestic -
33 Onslow Avenue Cheam SM2 7ED
Erection of a single storey rear extension, conversion of garage into habitable room and a front entrance porch.
Granted Householder Extension 12 docsSmall domestic -
1 Scarborough Close Cheam Surrey SM2 7EA
Erection of a conservatory at rear.
Granted Householder ExtensionSmall domestic -
6 Scarborough Close Cheam SM2 7EA
Rebuilding of garage with extension over, erection of a two storey bay extension and enlargement of dormer extension at front.
Granted Householder Extension Loft or dormerDomestic -
9 Scarborough Close Cheam SM2 7EA
Erection of part one, part two storey front/side extensions including dormer extensions at front and the formation of a front entrance porch, erection of a single storey side/rear extension and provision of a new flank chimney breast and stack.
Refused Householder Extension Loft or dormer 12 docsSmall domestic
Other householder applications
In Sutton
-
DM2026/00825 Refused
4 Oakwood Wallington SM6 0RD
Prior Approval for a single storey upwards extension projecting from the original house by 2.81m.
-
DM2026/00600 Granted
5 Waterer Rise Wallington SM6 9DN
Erection of front boundary gates with walls, piers and railings.
-
DM2026/00544 Granted
18 Cheviot Close Sutton SM2 5SB
Erection of a single storey front, side and rear extension.
-
DM2026/00083 Granted
53 Oxford Road Carshalton SM5 3QZ
Erection of a part one, part two storey side and rear extension. Conversion of loft space involving alterations to existing roofline, a dormer extension at rear and rooflights to front roofslope.
-
DM2026/00644 Granted
37 Farm Way Worcester Park KT4 8RZ
Erection of a single storey rear extension and conversion of the garage to a habitable room with associated external works.