Planning application
26/AP/2230
11 Calton Avenue London Southwark SE21 7DE
Proposal
Erection of a single-storey side extension following demolition of the existing side extension.
As published by the council, reference 26/AP/2230
Timeline
Dates from the published record
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28 Jul 2026
Received by Southwark
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30 Jul 2026
Validated
Checked as complete and ready for consideration.
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1 Aug 2026
Added to PlanIndex
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Decision
Awaiting decision
The statutory target is eight weeks for most applications and thirteen for major development. Extensions of time are common.
What happens while it is decided
The process from here
This application is with Southwark 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 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/2014 Awaiting decision
11 Calton Avenue London Southwark SE21 7DE
Certificate of lawfulness (proposed) for removal of existing rear extension and construction of a new ground floor rear extension.
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26/AP/1965 Granted
20 Calton Avenue London Southwark SE21 7DQ
5 DAY NOTIFICATION: 3917 Tree of heaven Deadwood > 5cm Remove major deadwood 3926 Common lime Deadwood > 5cm Remove major deadwood. 3921 Common lime Deadwood > 5cm Remove deadwood over rear garden and footpath. Also Clear basal epicormic growth to allow for ground level to 1.5m inspection.
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26/AP/1312 Granted
10B Calton Avenue London Southwark SE21 7DQ
Works to tree with a TCA: T1- 3908 Smokebush (Crown Reduction - Reduce north eastern limb to 50cm away from stem, back to closest growth point and repollard). T2 - 3909 Smokebush (Crown Reduction - Reduce north eastern limb by 1m back to closest growth point. And repollard). T3 - 3907 Smokebush (Crown Reduction - Reduce limb at 1.2m above ground level back to stem (natural target prune). Also Repollard).
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22/AP/3949 Granted
Common Land Rear 55 And 56 Dekker Road London Southwark SE21 7DJ
Works to a tree in a conservation area: Works: Crown lift to 4m above rear garden + lateral reduce by up to 2m back to suitable growth points, retaining overall height and form. Reason: to abate nuisance.
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22/AP/3874 Decided
Land To Rear Of 25 Dulwich Village London Southwark SE21 7BN
Non material amendment of planning permission 19/AP/1788: Variation of Condition 1 - Approved Plans - as required by planning permission 14/AP/3104 (Redevelopment of the site to include the demolition of all existing buildings (Use Class B2) and the excavation and removal of fuel tanks and associated supply lines and the construction of 12 dwellings (Use Class C3), 1 x 2 bed and 2 x 1 bed affordable dwellings, 1 x 3 bed house (affordable, wheelchair accessible dwelling), 4 x 4 bed houses and 4 x 5 bed houses with ancillary living accommodation and car parking at basement level accessed from Gilkes Place and landscaping): Removal of Grade II listed Stocks Memorial Plaque.
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22/AP/3868 Granted
Land To Rear Of 25 Dulwich Village London Southwark SE21 7BN
Permanent relocation of Grade II Listed stone plaque from the garden adjoining 1d Calton Avenue, Dulwich, London SE21 7DE to the adjacent Dulwich College Burial Ground.
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/2211 Awaiting decision
27 Lanbury Road London Southwark SE15 3DB
Partial demolition and reconstruction of the existing ground floor rear extension.