Planning application
26/AP/1326
12C Alleyn Road London Southwark SE21 8AL
Proposal
Construction of a rear extension, loft conversion, and the installation of a new window to side elevation, replacement windows and roof lights in rear extension
As published by the council, reference 26/AP/1326
Timeline
Dates from the published record
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8 May 2026
Received by Southwark
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2 Jul 2026
Decision issued: Householder - GRANTED
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25 Jul 2026
Added to PlanIndex
What 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
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26/AP/1793 Awaiting decision
1 Alleyn Road London Southwark SE21 8AB
Details to discharge Condition 4 'Landscaping Scheme' full planning application 23/AP/3087 dated 13/03/2024 for Enlargement of existing basement with 1no. Lightwell to the front and 1no. Lightwell to the south elevation, associated with new patio area in the rear garden and replacement of ground floor windows; - Construction of loft conversion with 2no. dormer windows and 2no. roof windows on northwest and southeast elevations, associated with removal of 1no. chimney to the front slope and change of roof top on garage; - Conversion of side conservatory to a bricked extension; - Enlargement of vehicular entrance to garage and blocking up of a side door, - blocking up of a rear window and door of the garage; - Installation of solar slates on front and rear roof slopes of both main house and garage; - Installation of 2nos. ASHP and 1no. AC unit on south elevation; - Proposed material railings and gates on the front boundary; Condition Number(s): 4 Conditions(s) Removal: Specifically on Point 4 of the attached it?s asking for this to be approved in advance. I?ve attached our landscaping plans. The specific planting schedule will be done closer to the time. In regards to tree protections we will protect the 5 lime trees along with their roots by having hoarding covering the existing grass area surrounding the trees. n/a
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26/AP/1143 Granted
7 Alleyn Crescent London Southwark SE21 8BN
Construction of a two-storey side extension; replacement of front boundary timber wall to brick; inclusion of bin store and installation of a ground floor side facing window
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22/AP/3866 Granted
3 Morkyns Walk Alleyn Park London Southwark SE21 8BG
Replacement of existing single and double glazed timber and PVC windows with triple glazed aluminium-timber composite windows and raising of main and rear roof in order to install additional insulation and a ventilation layer.
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22/AP/3968 Granted
3 Morkyns Walk Alleyn Park London Southwark SE21 8BG
Holly (T1, c.5m tall) and Conifer (T2, c.4m tall) are under 60cm apart on the front elevation - Fell as close to ground level as possible because they are growing too close to the building (under 65cm and under 55cm away)
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22/AP/3627 Granted
49 Alleyn Park London Southwark SE21 8AT
Works to a TPO tree: T1- Oak Tree, to lightly thin the crown trimming back from the neighbouring Koelreuteria tree.
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22/AP/4042 Granted
23 Alleyn Road London Southwark SE21 8AB
T1. Mature veteran Oak tree - some removal of dead wood plus a small amount of crown lifting by up to 1.5metres in places to improve the balance and look of the tree
Other householder applications
In Southwark
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26/AP/2269 Awaiting decision
88 Holmdene Avenue London Southwark SE24 9LE
Side extension and replacement rear extension, replacement roof dormer, rooflights to the main roof, removal of a small single-pot chimney, and alterations to window openings in the side elevation.
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26/AP/1459 Granted
422 Lordship Lane London Southwark SE22 8NE
Demolition of the existing lean-to outrigger to facilitate the erection of a single storey rear extension and a raised decked area.
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26/AP/2252 Awaiting decision
19 Crofton Road London Southwark SE5 8LY
Erection of a rear dormer extension, including a 350 mm increase to the main roof ridge, rear-facing timber casement windows and rooflights to the dormer roof, together with the conversion of the existing loft storage space to provide a study, guest bedroom and associated storage.
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26/AP/1476 Granted
2 Weald Close London Southwark SE16 3ET
Proposed ground floor rear extension, garage conversion, loft conversion with rear dormer and 2no. rooflights to the front roof slope, floor plan redesign and all associated works at 2 Weald Close, SE16 3ET
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26/AP/2230 Awaiting decision
11 Calton Avenue London Southwark SE21 7DE
Erection of a single-storey side extension following demolition of the existing side extension.