House extensions in Southwark

Southwark received 259 householder applications in the last 12 months - about 5 a week. Rear extensions and dormers are the most common. Of the 137 decided so far, 133 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

184 last 90 days
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58 last 30 days
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16 last 14 days

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Showing 50 of 184 applications
26/AP/1991 8 Jul 2026 Pending

Third Floor Flat 115 Camberwell Grove London Southwark SE5 8JH

Listed Building Consent Replacement of existing windows and installation of 2no conservation rooflights; internal works including partial removal of i...

Southwark 8 Jul 2026
26/AP/1979 8 Jul 2026 Pending

19 Casino Avenue London Southwark SE24 9PQ

Ground floor rear extension and internal reconfiguration

Southwark 8 Jul 2026
26/AP/1978 7 Jul 2026 Pending

47 Lyndhurst Way London Southwark SE15 5AG

Replacement of all front elevation windows with double glazed timber sliding sash style windows to match existing styles and sizes, and replacement of...

Southwark 7 Jul 2026
26/AP/1972 7 Jul 2026 Pending

21 Barforth Road London Southwark SE15 3PS

Construction of a single storey ground floor wraparound rear extension.

Southwark 7 Jul 2026
26/AP/1958 7 Jul 2026 Pending

38 Winterbrook Road London Southwark SE24 9JA

Demolition of the existing rear extension and erection of a single-storey wraparound rear and side extension, together with associated alterations to ...

Southwark 7 Jul 2026
26/AP/1948 6 Jul 2026 Under consideration/assessment

117A Dulwich Village London Southwark SE21 7BL

Refurbishment of the existing residential flat including the installation of an air source heat pump to the rear elevation, replacement external light...

Minor application Southwark 6 Jul 2026
26/AP/1926 3 Jul 2026 Pending

25 Frogley Road London Southwark SE22 9DF

Construction of a ground floor rear infill extension, and the constructionof a mansard loft conversion.

Householder Application Southwark 3 Jul 2026
26/AP/1943 3 Jul 2026 Under consideration/assessment

35 Carver Road London Southwark SE24 9LS

Construction of rear dormer, installation of rooflights on east and west facing roof slopes, installation of new bin and bike stores within front gard...

Southwark 3 Jul 2026
26/AP/1920 2 Jul 2026 Under consideration/assessment

Lower Ground Floor Flat 87 Camberwell Grove London Southwark SE5 8JEL

Details of Condition 4- A. Detailed drawings for the reinstatement of decorative joinery details to the building's interior. B. Detailed drawings (1:1...

Approval of Details Southwark 2 Jul 2026
26/AP/1914 2 Jul 2026 Under consideration/assessment

The Hop Exchange 24 Southwark Street London Southwark SE1 1TY

Replacement Gate to Park Street entrance

Southwark 2 Jul 2026
26/AP/1894 30 Jun 2026 Under consideration/assessment

10 - 18 Union Street London Southwark SE1 1SZ

Replacement windows and doors to Union Street (South elevation).

Minor application Southwark 30 Jun 2026
26/AP/1909 30 Jun 2026 Under consideration/assessment

6 Ethnard Road London Southwark SE15 1RU

Certificate of lawfulness (proposed) for a loft conversion with rear dormer

Certificate of Lawful Dev. - Proposed Southwark 30 Jun 2026
26/AP/1878 29 Jun 2026 Under consideration/assessment

Flat 3 170 - 172 Tower Bridge Road London Southwark SE1 3LS

Creation of a new north-facing dormer with rooflights; Remodelling of the existing south-facing dormer to enlarge the roof terrace, with installation ...

Minor application Southwark 29 Jun 2026
26/AP/1865 26 Jun 2026 Under consideration/assessment

22 Chesterfield Grove London Southwark SE22 8RW

Construction of an L-shaped dormer extension with Juliet balcony, together with raising ridge by 278mm, installation of 3no. rooflights to front roof ...

Householder Application Southwark 26 Jun 2026
26/AP/1852 25 Jun 2026 Under consideration/assessment

The Old Rectory Liverpool Grove London Southwark SE17 2HH

Details of Condition 7 - CEMP as required by full planning permission 24/AP/3430 dated 03/04/2025 for Two storey rear extension, including air source ...

Approval of Details Southwark 25 Jun 2026
26/AP/1841 25 Jun 2026 Under consideration/assessment

38 Camberwell Grove London Southwark SE5 8RE

Construction of a three storey building plus basement self-build family home following demolition of a curtilage listed garage structure; the erection...

Listed Building Consent Southwark 25 Jun 2026
26/AP/1840 25 Jun 2026 Under consideration/assessment

38 Camberwell Grove London Southwark SE5 8RE

Construction of a three storey building plus basement self-build family home following demolition of a curtilage listed garage structure; the erection...

Minor application Southwark 25 Jun 2026
26/AP/1831 24 Jun 2026 Under consideration/assessment

20 Homeleigh Road London Southwark SE15 3EE

Construction of an L-shape dormer loft conversion with 450mm ridge raise to provide two bedrooms and a shower room.

Householder Application Southwark 24 Jun 2026
26/AP/1832 24 Jun 2026 Under consideration/assessment

13 Boxall Road London Southwark SE21 7JS

Loft conversion with rear dormer and installation of roof lights, ground floor side return extension, internal alterations / refurbishment & rear exte...

Householder Application Southwark 24 Jun 2026
26/AP/1824 23 Jun 2026 Under consideration/assessment

166 Copleston Road London Southwark SE15 4AF

Proposed loft conversion with rear L shape dormer and introduction of new terrace with 1.8m high Glazedscreening and internal alterations

Minor application Southwark 23 Jun 2026
26/AP/1817 23 Jun 2026 Under consideration/assessment

8 Kinsale Road London Southwark SE15 4HL

Certificate of lawful development (proposed) for contruction of rear dormer.

Certificate of Lawful Dev. - Proposed Southwark 23 Jun 2026
26/AP/1811 22 Jun 2026 Under consideration/assessment

102 Benhill Road London Southwark SE5 7FU

Addition of single-storey vertical extension and relocation of the existing roof terrace above the proposed extension.

Householder Application Southwark 22 Jun 2026
26/AP/1796 22 Jun 2026 Pending

42 Grove Lane London Southwark SE5 8ST

External alterations including second floor closet wing extension, enlargement of the existing rear lightwell and new steps to the rear garden; altera...

Southwark 22 Jun 2026
26/AP/1801 22 Jun 2026 Under consideration/assessment

45 Achilles Close London Southwark SE1 5HE

Construction of a single-storey rear extension.

Householder Application Southwark 22 Jun 2026
26/AP/1798 22 Jun 2026 Under consideration/assessment

167 Barry Road London Southwark SE22 0JP

Construction of a double storey rear extension; one rooflight to flat roof and reducing size of glazing to the existing rear loft dormer.

Householder Application Southwark 22 Jun 2026
26/AP/1795 22 Jun 2026 Under consideration/assessment

50 Landcroft Road London Southwark SE22 9LD

Proposed single storey wraparound extension and all associated works at 50 Landcroft Road, London SE22 9LD.

Householder Application Southwark 22 Jun 2026
26/AP/1785 19 Jun 2026 Under consideration/assessment

65 Grove Hill Road London Southwark SE5 8DF

Prior approval for addition of a second-story extension to the existing terrace to match the same height as adjoining property

All other prior approval applications Southwark 19 Jun 2026
26/AP/1791 19 Jun 2026 Granted

Messenger Court 150 Spa Road London Southwark SE16 4AU

Certificate of lawfulness (proposed) for remediation of existing combustible facade materials and replacement with compliant alternatives. Works inclu...

Certificate of Lawful Dev. - Proposed Southwark 19 Jun 2026
26/AP/1771 18 Jun 2026 Under consideration/assessment

209 Hollydale Road London Southwark SE15 2AR

Construction of a ground floor side extension with a green roof and 2no. rooflights, 2no. rooflights to existing pitched outrigger roof, addition of a...

Householder Application Southwark 18 Jun 2026
26/AP/1764 18 Jun 2026 Under consideration/assessment

1 Smith Close London Southwark SE16 5PB

Proposed single-storey front extension measuring 2.1 metres in depth, merging with the existing dwelling, including associated doors and windows.

Householder Application Southwark 18 Jun 2026
26/AP/1768 18 Jun 2026 Under consideration/assessment

252 Barry Road London Southwark SE22 0JS

Addition of a roof terrace to the rear roof with access from an existing rear facing dormer window.

Householder Application Southwark 18 Jun 2026
26/AP/1765 18 Jun 2026 Pending

Flat 1 97 Camberwell Grove London Southwark SE5 8JH

Renewal of roof hatch and window frame to second floor rear window, because they need repairing

Southwark 18 Jun 2026
26/AP/1773 18 Jun 2026 Under consideration/assessment

5 Copleston Road London Southwark SE15 4AN

Replacement of all existing single-glazed timber windows with white double-glazed uPVC units (sash to front; casement to rear and sides), and replacem...

Minor application Southwark 18 Jun 2026
26/AP/1774 18 Jun 2026 Under consideration/assessment

2 Morocco Street London Southwark SE1 3HB

Replace window and doors facing the rear non-public accesible courtyard. The ground and first floors are not visible from any public space.

Minor application Southwark 18 Jun 2026
26/AP/1759 17 Jun 2026 Under consideration/assessment

29 Dundas Road London Southwark SE15 2DR

Certificate of Lawful Development (Proposed) for 1. The Main Operations (Building Works) Full planning application ref: 25/AP/3755 For loft conversion...

Certificate of Lawful Dev. - Proposed Southwark 17 Jun 2026
26/AP/1762 17 Jun 2026 Under consideration/assessment

19 Beckwith Road London Southwark SE24 9LH

Demolition of existing rear ground floor side extension and shed, and replacement with single storey rear ground floor side extension

Householder Application Southwark 17 Jun 2026
26/AP/1752 17 Jun 2026 Under consideration/assessment

29 Ruskin Walk London Southwark SE24 9NA

Construction of a single storey rear extension; installation of a single storey rear garden office; rendering of front and rear facades and alteration...

Householder Application Southwark 17 Jun 2026
26/AP/1750 17 Jun 2026 Under consideration/assessment

Flat 1 75 - 76 Blackfriars Road London Southwark SE1 8HA

Refurbishment of all existing windows and replacement of an existing rear casement window with a timber sash window.

Minor application Southwark 17 Jun 2026
26/AP/1734 16 Jun 2026 Under consideration/assessment

126 Kimberley Avenue London Southwark SE15 3XG

Construction of an L-shaped dormer, the addition of two rooflights to the front roof slope, alterations to the fenestration at ground floor level, alt...

Householder Application Southwark 16 Jun 2026
26/AP/1724 16 Jun 2026 Pending

13 Court Lane London Southwark SE21 7DH

Internal rearrangement, addition and replacement of windows, installation of heat pump and solar panels, landscaping to front and rear including remov...

Southwark 16 Jun 2026
26/AP/1737 16 Jun 2026 Under consideration/assessment

45 Achilles Close London Southwark SE1 5HE

Certificate of Lawfulness (proposed) for the development of a garage conversion to replace the garage door with a window.

Certificate of Lawful Dev. - Proposed Southwark 16 Jun 2026
26/AP/1726 16 Jun 2026 Under consideration/assessment

33 Highshore Road London Southwark SE15 5AF

Refurbishment of a semi-detatched family dwelling including waterproofing works at lower ground floor level, repairs to the existing front entrance st...

Householder Application Southwark 16 Jun 2026
26/AP/1729 16 Jun 2026 Under consideration/assessment

298 Old Kent Road London Southwark SE1 5UE

Construction of a single storey outbuilding at 298 98 OLD KENT ROAD SE1 5UE

Minor application Southwark 16 Jun 2026
26/AP/1725 16 Jun 2026 Under consideration/assessment

30 Sunray Avenue London Southwark SE24 9PX

Replacement of existing upvc windows with traditional timber double glazed units.

Householder Application Southwark 16 Jun 2026
26/AP/1745 16 Jun 2026 Under consideration/assessment

99 Hollydale Road London Southwark SE15 2TE

Demolition of the existing wrap-around ground floor extension and the erection of a new wrap-around rear extension incorporating a flat roof at 3.0 m ...

Householder Application Southwark 16 Jun 2026
26/AP/1744 16 Jun 2026 Under consideration/assessment

155 Chadwick Road London Southwark SE15 4PY

Refurbishing and extending the existing house to create a more practical, modern living space. The work includes single-storey side and rear extension...

Householder Application Southwark 16 Jun 2026
26/AP/1702 15 Jun 2026 Pending

63 Vestry Road London Southwark SE5 8PG

Rear ground floor extension including infill of side alley to form enlarged kitchen and dining area, and demolition of external toilet. Enlargement of...

Southwark 15 Jun 2026
26/AP/1722 15 Jun 2026 Under consideration/assessment

58A Waveney Avenue London Southwark SE15 3UE

Creating a wraparound extension to the rear of the property. The extension will fill in the side return with a sloped roof and extend to the rear of t...

Householder Application Southwark 15 Jun 2026
26/AP/1700 15 Jun 2026 Under consideration/assessment

258A And 258B Southwark Park Road London Southwark SE16 3RN

Construction of a third floor loft / roof conversion to house an additional bedroom, this application is to match that of 264-266 Southwark Park Road ...

Minor application Southwark 15 Jun 2026
26/AP/1692 12 Jun 2026 Granted

33 Carver Road London Southwark SE24 9LS

Certificate of Lawful devlopment (proposed) for the construction of a gable-roofed outbuilding with rooflight and glazing at the rear of the property'...

Certificate of Lawful Dev. - Proposed Southwark 12 Jun 2026
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Frequently asked questions

When do you need planning permission for a house extension?
Single-storey rear extensions up to 4m (detached) or 3m (semi-detached / terraced) are usually permitted development. Two-storey extensions, anything in a conservation area, or larger projects almost always need a planning application.
What's the difference between planning permission and permitted development?
Permitted development rights let you build certain things without applying for planning permission, subject to specified limits. Anything outside those limits — taller, larger, in a protected area — needs full planning permission.
How long does a householder application take?
The statutory target is 8 weeks from validation. Most simple householder extensions are decided within that window; complex or contested cases (especially with objections) can take longer.
Can I get email alerts for new extensions applications in Southwark?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Southwark. You can also narrow the alert to a postcode, street, or drawn area.

We check Southwark's planning portal daily. New extensions applications appear here within a day of being published.