Planning application
15 Colnbrook Street London Southwark SE1 6EZ
Works: Extension Windows or glazing Domestic
Read from the description, not a valuation. How we read the register
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
First-floor rear extension to existing outrigger; lowering & reinstatement of front parapet entablature; repair and re-glazing of existing windows; replacement of rear basement window with French doors; new front lightwell staircase; installation of Air Source Heat Pump/Air Conditioning and building services upgrades; associated internal alterations, repairs, and landscaping.
As published by the council, reference 26/AP/1114
Application record
- Reference
- 26/AP/1114
- Type
- Householder Application
- Status
- Under consideration/assessment
- Received
- 20 Apr 2026
- Validated
- 7 May 2026
- Ward
- St Georges
- Parish
- Borough, Bankside And Walworth
- Postcode
- SE1 6EZ
Site history
Applications at this address on the Southwark register
This site has had 4 applications since 2022: 0 approved, 2 refused.
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26/AP/1115 Awaiting decision
15 Colnbrook Street London Southwark SE1 6EZ
Listed building consent for the first-floor rear extension to existing outrigger; lowering & reinstatement of front parapet entablature; repair and re-glazing of existing windows; replacement of rear basement window with French doors; new front lightwell staircase; installation of Air Source Heat Pump/Air Conditioning and building services upgrades; associated internal alterations, repairs, and landscaping.
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22/AP/1032 Refused
15 Colnbrook Street London Southwark SE1 6EZ
Construction of extension on rear outrigger, restoration of front facade and removal of chimney breast at lower ground floor
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22/AP/0881 Refused
15 Colnbrook Street London Southwark SE1 6EZ
Construction of rear extension on outrigger
Timeline
Dates from the published record
-
20 Apr 2026
Received by Southwark
-
7 May 2026
Validated
Checked as complete and ready for consideration.
-
10 Aug 2026
Added to PlanIndex
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Decision
Awaiting decision
Decision expected by 2 July 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Southwark took a median of 52 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Agent on file, an architecture practice registered in London
68 applications on PlanIndex · across 18 councils · 72% granted
Trade members see who it is, their full track record, and every application they have filed.
See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
55 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 happens while it is decided
This application is with Southwark for determination, against a statutory target of eight weeks. Over the last year Southwark decided householder applications in a median of 56 days. More in our guide to how long planning decisions take.
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 500 metres
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15 Colnbrook Street London Southwark SE1 6EZ
Construction of extension on rear outrigger, restoration of front facade and removal of chimney breast at lower ground floor
Refused Heritage and listed buildings Extension 30 docs -
15 Colnbrook Street London Southwark SE1 6EZ
Construction of rear extension on outrigger
Refused Householder Extension 29 docsDomestic -
15 Colnbrook Street London Southwark SE1 6EZ
93% historically approved · decision due ~30 Jun
Listed building consent for the first-floor rear extension to existing outrigger; lowering & reinstatement of front parapet entablature; repair and re-glazing of existing windows; replacement of rear basement window with French doors; new front lightwell staircase; installation of Air Source Heat Pump/Air Conditioning and building services upgrades; associated internal alterations, repairs, and landscaping.
Awaiting decision Heritage and listed buildings Extension Windows or glazing 42 docs -
13 Colnbrook Street London Southwark SE1 6EZ
Details of Condition 3 Specification and method statements of waterproofing to basement walls and floor as required 21/AP/0188 dated 11/03/2021 for Internal refurbishment of the building on all floors including repair of historic fabric, damp proof works, new openings and wider openings at Lower Ground Floor, removal of modern bathroom fittings First Floor rear room rmoval of modern partitions at Second Floor level and installation of bathroom. External alterations including widening of the outrigger at Ground Floor level and replacement of the existing window with a new sash window in a wider opening. Widening of opening in rear wall and installation of new timber French doors and replacement of uPVC window with a timber sash. Removal of existing door to the outrigger and filling in of opening with new brickwork to match existing. Installation of a rooflight. Replacement of the mansard windows with doors on the front elevation.
Granted Conditions Extension Loft or dormer +1 12 docs -
The Garages Land To Rear Of 108 St Georges Road London Southwark SE1 6EZ
95% historically approved · decision due ~1 Oct
Non-material amendment of planning permission ref: 21/AP/2433 dated 21.01.2022 for 'Demolition of an existing garage and construction of a two-storey, 1 bedroom dwelling house.' Amendments include: 1. The position of the internal staircase is to be revised to create a more open and functional layout at both ground floor and basement levels. 2. The bathroom layout is to be reconfigured to provide a more generous entrance hall. 3. The approved front window is proposed to be replaced with a double-glazed sliding door incorporating a 100mm opening restrictor on the ground floor. 4. The high-level rear window is proposed to be repositioned slightly to align with the revised internal layout. 5. New slot windows are proposed to the side elevation to augment daylight in the entrance hall. 6. Storage repositioned.
Awaiting decision Demolition Windows or glazingDomestic -
42 Gladstone Street London Southwark SE1 6EY
Proposal to provide rooflight access to existing roof and extension of internal stairs to roof to provide roof access. Removal of existing steel access ladder from front balcony and mansard roof.
Withdrawn Heritage and listed buildings Extension Loft or dormer 18 docs
Other householder applications
In Southwark
-
26/AP/0707 Granted
33 Abbotswood Road London Southwark SE22 8DJ
Construction of a rear dormer extension and ground floor rear extension.
-
26/AP/0784 Granted
60 Grove Park London Southwark SE5 8LF
Refurbishment of the property including replacement of glazing with thermally efficient conservation windows templated after originals, construction of a single-storey rear extension, a loft extension, minor internal partition alterations, and removal of external soil vent pipes.
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26/AP/1488 Granted
15 Canon Beck Road London Southwark SE16 7DJ
Loft conversion including the insertion of 2 no. rooflights to the front roof slope; conversion of the existing garage to a habitable room with an associated window to replace the existing garage door on the front elevation, installation of an Air Source Heat Pump and other alterations to the rear elevation fenestration at ground floor level.
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26/AP/0971 Granted
86 Henslowe Road London Southwark SE22 0AS
Retrospective planning permission for alterations to front garden layout including a front porch with projecting canopy, alterations to window apertures and fenestration, provision of cycle and refuses stores, along with hard and soft landscaping. new bin store and raised porch roof and revisions to front elevation fenestration.
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26/AP/1519 Granted
61 Tyrrell Road London Southwark SE22 9NE
Construction for a rear and side wrap around ground floor extension