Planning application
20 Harlescott Road London Southwark SE15 3BZ
Works: Extension 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
Construction of a single storey ground floor wraparound rear extension.
As published by the council, reference 26/AP/0394
Application record
- Reference
- 26/AP/0394
- Type
- Householder Application
- Status
- Granted
- Decision
- Granted As published: Householder - GRANTED
- Received
- 10 Feb 2026
- Validated
- 12 Feb 2026
- Decided
- 7 Apr 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.
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26/AP/0307 Granted
20 Harlescott Road London Southwark SE15 3BZ
Certificate of lawfulness (proposed) for conversion of Loft including formation of rear dormer and outrigger with skylights to front roof slope.
Timeline
Dates from the published record
-
10 Feb 2026
Received by Southwark
-
12 Feb 2026
Validated
Checked as complete and ready for consideration.
-
7 Apr 2026
Decision issued: Householder - 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
11 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 7 April 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 householder applications
Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
20 Harlescott Road London Southwark SE15 3BZ
Certificate of lawfulness (proposed) for conversion of Loft including formation of rear dormer and outrigger with skylights to front roof slope.
Granted Lawful development Extension Loft or dormer 9 docs -
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 householder applications
In Southwark
-
26/AP/2158 Granted
7 Alma Grove London Southwark SE1 5PY
Erection of a rear ground floor side extension with a framed glass roof and bi-folding rear doors. Replacement of windows and door. Alterations to external facade.
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26/AP/2601 Awaiting decision
49 Henshaw Street London Southwark SE17 1PE
Demolition of existing rear extension and construction of part single, part two storey rear extension and erection of roof terrace on main roof with balustrades and glazed access hatch.
-
26/AP/2545 Awaiting decision
76 Shenley Road London Southwark SE5 8NQ
Construction of a single storey side and rear extension to the rear; construction of a rear dormer roof extension over the main roofslope and the installation of 3x rooflights to the front roofslope.
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26/AP/2533 Awaiting decision
28 Tyrrell Road London Southwark SE22 9NE
Construction of rear extension.
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26/AP/2517 Awaiting decision
65 Calton Avenue London Southwark SE21 7DF
Construction of a ground-floor side-rear extension with terrace reinstated above; alterations to the rear outrigger, including raising the eaves and ridge, removal of the chimney stack, replacement windows, and installation of two rooflights; enlargement of the existing rear dormer; erection of bin and bike stores in the front garden, together with new landscaping and a front boundary wall; installation of an EV charger to front elevation and removal of existing front porch door; removal of existing garden buildings and erection of a shed, sauna and pergola in the rear garden, together with new landscaping and decking.