Planning application
49 Thornton Road London SW12 0JX
Works: Extension Loft or dormer
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Application for Certificate of Lawfulness (Proposed) with respect to the erection of a rear dormer roof extension and installation of two front rooflights.
As published by the council, reference 26/00057/LDCP
Application record
- Reference
- 26/00057/LDCP
- Type
- Certificate of Lawful Use proposed
- Status
- Awaiting decision
- Received
- 8 Jan 2026
- Validated
- 8 Jan 2026
- Ward
- Streatham Hill West & Thornton
- Postcode
- SW12 0JX
Timeline
Dates from the published record
-
8 Jan 2026
Received by Lambeth
-
10 Aug 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 5 March 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Lambeth took a median of 56 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Agent on file, an architecture practice
32 applications on PlanIndex · across 8 councils · 79% 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
7 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 happens while it is decided
The process from here
This application is with Lambeth for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
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
-
47 Thornton Road London Lambeth SW12 0JX
85% historically approved · decision due ~15 Jun
Application for a Certificate of Lawful Certificate (Proposed) for the erection of a rear dormer roof extension and installation of two Rooflights on the Front Roof.
Awaiting decision Lawful development Extension Loft or dormer 14 docs -
2 Parkthorne Road London SW12 0JW
Erection of a 2 storey side extension. Erection of single storey ground floor rear extension.
Granted Full applications Extension 24 docsSmall domestic -
Land At No. 200-262 Hydethorpe Road And Bound By Thornton Road London SW12
Construction of a part 4 , part 5 storey building comprising 14 residential units, associated cycle parking, landscaping together with associated works.
Granted Other 67 docs -
Land At No. 200-262 Hydethorpe Road And Bound By Thornton Road London SW12
Approval of details pursuant to condition 21 (Arboricultural Method Statement) of planning permission 20/01264/RG3 (Construction of a part 4 , part 5 storey building comprising 14 residential units, associated cycle parking, landscaping together with associated works) granted on 23.07.2020.
Granted Conditions 6 docs -
Land At No. 200-262 Hydethorpe Road And Bound By Thornton Road London SW12
Approval of details pursuant to condition 22 (Landscaping) of planning permission 20/01264/RG3 (Construction of a part 4 , part 5 storey building comprising 14 residential units, associated cycle parking, landscaping together with associated works) granted on 23.07.2020.
Granted Conditions 31 docs -
3 Parkthorne Road London SW12 0JN
Application for a non-material amendment following a grant of planning permission ref: 19/02286/FUL (Erection of single storey ground floor front extension and single storey first floor side extension.) Granted on: 21.08.2019
Refused Amendments Extension 7 docsSmall domestic
Other lawful development applications
In Lambeth
-
26/01447/LDCP Granted
2 Stannary Street London SE11 4AA
Application for a Certificate of Lawful Development (Proposed) with respect to remedial works to fix selected sliding glazed door panels shut and associated alterations to the existing glazing system within the existing curtain wall openings of the penthouse flat.
-
26/01071/LDCP Withdrawn
36 Elms Road London Lambeth SW4 9EX
Certificate of Lawful Development (Proposed) with respect to the erection of side and rear 'box' roof extensions including a side roof light and removal of a chimney.
-
26/00455/LDCP Granted
129 Hydethorpe Road London SW12 0JF
Application for Certificate of Lawful Development (Proposed) with respect to the erection of a rear dormer roof extension and installation of new rooflights to the front roof slope.
-
26/01485/LDCP Granted
88 Ballater Road London SW2 5QP
Application for a Certificate of Lawful Development (Proposed) with respect to erection of a rear dormer roof extension and installation of 2 x rooflights to existing roof at front elevation and 1 x rooflight to existing rear outrigger roof
-
26/01478/LDCP Refused
142 Rosendale Road London SE21 8LG
Certificate of Lawful Development (Proposed) with respect to the deconversion of existing three self-contained flats into one single dwellinghouse.