Planning application
20 Harlescott Road London Southwark SE15 3BZ
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 (proposed) for conversion of Loft including formation of rear dormer and outrigger with skylights to front roof slope.
As published by the council, reference 26/AP/0307
Application record
- Reference
- 26/AP/0307
- Type
- Certificate of Lawful Dev. - Proposed
- Status
- Granted
- Decision
- Granted As published: Certificate of Lawfulness Prop- GRANTED
- Received
- 3 Feb 2026
- Validated
- 3 Feb 2026
- Decided
- 25 Mar 2026
- Ward
- Peckham Rye
- Parish
- Peckham And Nunhead
- Decision by
- Delegated Panel - Simple
- Postcode
- SE15 3BZ
Site history
Applications at this address on the Southwark register
This site has had 2 applications since 2026: 2 approved, 0 refused.
-
26/AP/0394 Granted
20 Harlescott Road London Southwark SE15 3BZ
Construction of a single storey ground floor wraparound rear extension.
Timeline
Dates from the published record
-
3 Feb 2026
Received by Southwark
-
25 Mar 2026
Decision issued: Certificate of Lawfulness Prop- GRANTED
-
10 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
C4 Design Ltd Agent, a design practice registered in Dartford
Active · incorporated 2016 · Dartford
18 applications on PlanIndex · across 6 councils · 62% 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
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.
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Open the documentsWhat this grant of permission means
Southwark granted permission on 25 March 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 Harlescott Road London Southwark SE15 3BZ
Construction of a single storey ground floor wraparound rear extension.
Granted Householder Extension 11 docsSmall domestic -
22 Harlescott Road London Southwark SE15 3BZ
95% historically approved · decision due ~6 Jan
Certificate of lawful development (proposed) for a roof dormer over the main roof slope, a dormer over the existing rear projection and alterations to the existing ground floor outrigger. Please refer to supporting documents for details.
Awaiting decision Lawful development Extension Loft or dormer 11 docs -
22 Harlescott Road London Southwark SE15 3BZ
95% historically approved · decision due ~8 Jan
Construction of a roof dormer, over the rear pitch of the main roof, a dormer over the existing rear projection and alterations to the existing ground floor rear extension.
Awaiting decision Householder Extension Loft or dormer 18 docsDomestic -
26 Harlescott Road London Southwark SE15 3BZ
Construction of a 'L' shaped rear dormer extension with juliet balcony, increasing the roof ridge line by 400mm and the addition of two roof lights to the front roof slope.
Granted Householder Extension Loft or dormer 16 docsDomestic -
10 Harlescott Road London Southwark SE15 3BZ
Construction of single storey rear extension.
Granted Householder Extension 9 docsSmall domestic -
6 Harlescott Road London Southwark SE15 3BZ
Construction of a L-shaped dormer loft extension to the rear with a ridge line raise of 500mm and installation of 2no rooflights to the front roof slope.
Granted Householder Extension Loft or dormer 14 docsDomestic
Other lawful development applications
In Southwark
-
26/AP/2574 Awaiting decision
23 Alberta Street London Southwark SE17 3SF
Certificate of lawfulness (proposed) for construction of a rear dormer and the installation of 1x rooflight to the front roofslope.
-
26/AP/2509 Awaiting decision
Newington Gardens Harper Road London Southwark SE1
Certificate of Lawfulness (proposed) for improvement works to the playground at Newington Gardens to include the removal of current playground equipment and installation of new accessible equipment.
-
26/AP/1673 Granted
Flat 67 Benbow House 24 New Globe Walk London Southwark SE1 9DS
Certificate of Lawful Development to replace existing external doors with new thermally improved doors
-
26/AP/1909 Granted
6 Ethnard Road London Southwark SE15 1RU
Certificate of lawfulness (proposed) for a loft conversion with rear dormer
-
26/AP/2486 Awaiting decision
84 Croxted Road London Southwark SE21 8NP
Certificate of lawfulness (proposed) for the formation of a moveable structure (as defined under the Caravan Site Act) that can be separated into 2 sections and removed from the rear garden by crane. Refer to the following drawings: 318 SP 00 (PD) 318 SP 01 (PD) 318 SP 101 (PD) 318 GS 01 (PD) 318 GS 02 (PD)