Planning application
40 Hargwyne Street London Lambeth SW9 9RG
Works: Extension Loft or dormer
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Erection of a mansard roof extension and rear roof extension to the outrigger.
As published by the council, reference 26/00218/FUL
Application record
- Reference
- 26/00218/FUL
- Type
- Full Planning Permission
- Status
- Decided
- Decision
- Grant Permission
- Received
- 25 Jan 2026
- Validated
- 13 Feb 2026
- Decided
- 23 Apr 2026
- Ward
- Brixton North
- Decision by
- Delegated Decision
- Postcode
- SW9 9RG
Timeline
Dates from the published record
-
25 Jan 2026
Received by Lambeth
-
13 Feb 2026
Validated
Checked as complete and ready for consideration.
-
23 Apr 2026
Decision issued: Grant Permission
-
10 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Agent on file, registered in London
2 applications on PlanIndex
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
15 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 full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
-
23 Mordaunt Street London SW9 9RD
78% historically approved · decision due ~20 Aug
Erection of a single storey ground floor rear and side infill extension.
Awaiting decision Full applications Extension 10 docsSmall domestic -
51 Mordaunt Street London SW9 9RD
Certificate of Lawful Development (proposed) in respect of the erection of a rear/side dormer extension over the outrigger with the installation of two front rooflights and a rear rooflight and the installation of a first floor rear side window.
Granted Lawful development Extension Loft or dormer +1 11 docs -
45 Hargwyne Street London SW9 9RQ
Erection of single storey ground floor rear and side infill extensions, alterations to windows to the side elevation at first floor level, alterations to roof over the rear return involving replacement of a pitched roof with a flat roof incorporating a domed skylight (part retrospective).
Refused Full applications Extension Windows or glazing 11 docsSmall domestic -
39 Hargwyne Street London SW99RQ
Erection of a side and rear ground floor extension.
Refused Full applications Extension 10 docs -
39 Hargwyne Street London SW9 9RQ
Application for a Certificate of Lawful Development (Proposed) with respect to the erection of rear and side infill extensions together with the erection of a rear dormer and installation of 3 front rooflights and a second floor rear extension incorporating a Juliet balcony.
Refused Lawful development Extension Loft or dormer 16 docs -
45 Hargwyne Street London SW9 9RQ
Application for a Certificate of Lawful Development (proposed) with respect to the erection of a rear dormer roof extension and the installation of two front rooflights
Granted Lawful development Extension Loft or dormer 14 docs
Other full applications applications
In Lambeth
-
26/01004/FUL Granted
49 Lansdowne Gardens London Lambeth SW8 2EL
Erection of a single-storey side extension to replace the existing garage, together with associated external alterations and internal alterations to a Grade II listed dwelling. Including: replacement of uPVC windows with timber sash windows; installation of conservation rooflights; repair and upgrade of flat roofs including replacement of asphalt with lead and parapet upgrades; replacement of uPVC gutters and downpipes with cast iron; repointing in lime mortar; internal alterations including minor reconfiguration of layout; addition of an a/c unit and other associated external alterations. (Planning Permission and Listed Building Consent ref : 26/01395/LB applications received).
-
26/01390/FUL Granted
7 Valleyfield Road London SW16 2HS
Erection of a two-storey side extension, hip to gable roof extension, erection of a rear dormer and rooflights, demolition of the existing attached garage and all other associated works.
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26/02466/FUL Awaiting decision
30 Chatsworth Way London SE27 9HN
Erection of a single-storey ground-floor rear extension, together with façade alterations, replacement windows, installation of rooflights and associated works.
-
26/00184/FUL Granted
Garages Adjacent To 21 Leaf Grove Leaf Grove London SE27 0SF
Redevelopment of the site to provide six dwellinghouses and the provision of cycle parking, refuse storage, landscaping and associated works.
-
26/02430/FUL Awaiting decision
33 Bellefields Road London SW9 9UH
Erection of a single-storey ground floor rear wrap-around extension, including a balcony at upper ground floor level.