Planning application
11 Calton Avenue London Southwark SE21 7DE
Works: Extension
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Certificate of lawfulness (proposed) for removal of existing rear extension and construction of a new ground floor rear extension.
As published by the council, reference 26/AP/2014
Application record
- Reference
- 26/AP/2014
- Type
- Certificate of Lawful Dev. - Proposed
- Status
- Granted
- Decision
- Certificate of Lawfulness Prop- GRANTED
- Received
- 9 Jul 2026
- Validated
- 10 Jul 2026
- Decided
- 4 Aug 2026
- Ward
- Dulwich Village
- Parish
- Dulwich
- Decision by
- Delegated - GOLD
- Postcode
- SE21 7DE
Site history
Applications at this address on the Southwark register
This site has had 2 applications since 2026: 1 approved, 0 refused.
-
26/AP/2230 Decided
11 Calton Avenue London Southwark SE21 7DE
Erection of a single-storey side extension following demolition of the existing side extension.
Timeline
Dates from the published record
-
9 Jul 2026
Received by Southwark
-
10 Jul 2026
Validated
Checked as complete and ready for consideration.
-
25 Jul 2026
Added to PlanIndex
-
4 Aug 2026
Decision issued: Certificate of Lawfulness Prop- GRANTED
-
9 Aug 2026
Status changed to Granted
Previously Under consideration/assessment.
Who's behind it
Company information only, from the register and Companies House
Plus Rooms Agent, registered in London
Dissolved · incorporated 2004 · London
36 applications on PlanIndex · across 8 councils · 94% granted
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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.
Trade members open them from here.
Open the documentsWhat this grant of permission means
Southwark granted permission on 4 August 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 500 metres
-
11 Calton Avenue London Southwark SE21 7DE
95% historically approved · decision due ~24 Sep
Erection of a single-storey side extension following demolition of the existing side extension.
Decided Extension DemolitionSmall domestic -
Land At 2-20 Calton Avenue And Woodwarde Avenue London Southwark SE21 7DQ
T1 Horse chesnut crown lift by 1.2mT1-T7 Lime Woodwarde Road remove dead wood crown lift over road
Granted Trees 3 docs -
2-20 Calton Avenue London Southwark SE21 7DQ
T12- Ailanthus, Calton Avenue, Crown lift 2mT13 & T16 Box Elder Maple, remove deadwoodT14 & T15 Cherry Plum, remove dead wood,lateral reduction to provide 2m clear from the property.
Granted Trees 3 docs -
47 Gilkes Crescent And 49 Gilkes Crescent London Southwark SE21 7BP
Works to a tree in a conservation area: Tree ID 6381. 6m High Hazel. To reduce height to approx 1.5m from ground level to effectively coppice and encourage fresh growth.
Granted Trees 6 docs -
20 Calton Avenue London Southwark SE21 7DQ
95% historically approved · decision due ~2 Sep
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.
Decided -
29 Calton Avenue London Southwark SE21 7DE
Tree works: Lime Tree on front boundary of property approximately 7.5m in height: crown thin by 40% including the removal of small stems from the pollarding points, and the retention of selected stems in order to create a more open and natural appearance, together with the removal of dead wood and necessary re-shaping.
Granted Trees 6 docs
Other lawful development applications
In Southwark
-
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/1759 Granted
29 Dundas Road London Southwark SE15 2DR
Certificate of Lawful Development (Proposed) for loft conversion with rear dormer, installation of roof lights to front roof slope, construction of a rear outbuilding, fenestration changes including new and replacement windows and installation of soil vent pipe.
-
26/AP/1942 Granted
Peckham Rye Railway Station Station Way London Southwark SE15 4RX
Certificate of lawfulness (existing) to confirm that planning permission 22/AP/1006 was lawfully implemented within the prescribed time period
-
26/AP/1625 Granted
97 - 99 Borough High Street Southwark SE1 1NL
Certificate of Lawful development (proposed) for: Like for like replacement of the existing Zinc Cladding, for non combustible insulation, behind the cladding and replacement external like for like (new) zinc cladding; and like for like replacement of the penthouse terrace decking and the balcony decking to the rear.