House extensions in Southwark

Southwark received 889 householder applications in the last 12 months - about 17 a week. Rear extensions and dormers are the most common. Of the 700 decided so far, 648 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

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Showing 50 of 217 applications
Yesterday Under consideration/assessment 26/AP/3148

35 Stradella Road London Southwark SE24 9HN

Certificate of lawfulness (proposed) for the removal of the existing garage doors/screens and installation of a new external wall and full-width white...

Certificate of Lawful Dev. - Proposed Southwark
Yesterday Under consideration/assessment 26/AP/3127

7 Soames Street London Southwark SE15 4BZ

Single storey rear infill extension.

Householder Application Southwark
Yesterday Under consideration/assessment 26/AP/2918

2-68 And 70-136 Chilton Grove London Southwark SE8 5DY

New Rockpanel cladding system to replace the sections of timber cladding on both estates in addition to over cladding the soffits on the flats balconi...

Local Authority Development by Others Southwark
2 days ago Under consideration/assessment 26/AP/3145

Arch 92 And 93 Tiverton Street London Southwark SE1 6FX

Change of use to Use Class E (a, b, c, e, g (ii) and (iii)) together with external alterations including demolition and provision of replacement brick...

Minor application Southwark
2 days ago Under consideration/assessment 26/AP/3128

50 Crofton Road London Southwark SE5 8NB

Loft conversion involving raising the main roof ridge by up to 400mm, a tile-clad rear dormer set back from the eaves, two rooflights to the front roo...

Householder Application Southwark
2 days ago Under consideration/assessment 26/AP/3126

King And Queen Wharf 197 Rotherhithe Street London Southwark SE16 5QY

Replacement of existing timber frame doors and windows to uPVC

Minor application Southwark
2 days ago Under consideration/assessment 26/AP/3125

229 Upland Road London Southwark SE22 0DJ

Single storey rear extension and all associated works at 229 Upland Road, London SE22 0DJ.

Householder Application Southwark
2 days ago Under consideration/assessment 26/AP/2925

36 Clifton Crescent London Southwark SE15 2RX

Internal alterations and reconfiguration of the existing dwelling, including removal of internal chimney breasts and associated internal walls; remova...

Minor application Southwark
23 Oct 2026 Under consideration/assessment 26/AP/3130

56 Marcia Road London Southwark SE1 5XF

Construction of dormer extensions to the rear roof slope and outrigger roof, raising of the party wall, and installation of two rooflights to the fron...

Householder Application Southwark
23 Oct 2026 Under consideration/assessment 26/AP/3129

150 Cherry Garden Street London Southwark SE16 4PB

Construction of an L-shaped rear dormer roof extension with a Juliet balcony, installation of three roof windows to the front roof slope, and conversi...

Householder Application Southwark
23 Oct 2026 Under consideration/assessment 26/AP/3110

1 Porlock Street London Southwark SE1 3RY

Certificate of lawful development for the construction of a new rear extension, projecting 3m and being 3m in height.

Certificate of Lawful Dev. - Proposed Southwark
22 Oct 2026 Under consideration/assessment 26/AP/3087

5 Fenwick Grove London Southwark SE15 4HT

Erection of a glazed greenhouse to first floor.

Householder Application Southwark
22 Oct 2026 Under consideration/assessment 26/AP/3016

1 Austral Street London Southwark SE11 4SJ

Reinstatement of the property from three self-contained flats to a single dwellinghouse (Use Class C3), including removal of the existing rear extensi...

Change of Use Southwark
21 Oct 2026 Under consideration/assessment 26/AP/3091

Ontario Point 28 Surrey Quays Road London Southwark SE16 7EE

Certificate of lawfulness (proposed) for fire safety remediation works, including replacement of fire curtains/shutters, installation of fire-stopping...

Certificate of Lawful Dev. - Proposed Southwark
20 Oct 2026 Under consideration/assessment 26/AP/3080

3 Court Lane Gardens London Southwark SE21 7DZ

Construction of a single storey garden building.

Householder Application Southwark
20 Oct 2026 Under consideration/assessment 26/AP/3097

13 Sutherland Square London Southwark SE17 3EQ

Remove a pear tree. Tree is located at site of proposed studio to the rear of garden. Tree is not publicly visible.

Works to a Tree with a TPO Southwark
19 Oct 2026 Under consideration/assessment 26/AP/3074

First Floor Flat 61 Melbourne Grove London Southwark SE22 8RG

Roof extension and loft conversion to the first floor flat, including a 200mm ridge raise, hip-to-gable conversion with a lightweight slate-hung gable...

Minor application Southwark
19 Oct 2026 Under consideration/assessment 26/AP/3064

23 Scutari Road London Southwark SE22 0NN

Replacement of existing rear conservatory with a single storey rear extension; hip-to-gable roof extension with rear dormer and front rooflights; remo...

Householder Application Southwark
19 Oct 2026 Under consideration/assessment 26/AP/2823

17 Parkstone Road London Southwark SE15 4UQ

Erection of single-storey self-build studio unit attached to an existing property at No. 17 Parkstone road.

Minor application Southwark
16 Oct 2026 Under consideration/assessment 26/AP/3062

Ground Floor And First Floor Flat 109 John Ruskin Street London Southwark SE5 0PQ

Replacement timber effect PVCu windows and doors to ground and first floor flat.

Minor application Southwark
16 Oct 2026 Under consideration/assessment 26/AP/3051

37 Melbourne Grove London Southwark SE22 8RG

Certificate of Lawful Development (Proposed) for Creation of a vehicular crossover and the creation of an area of hardstanding (porous) to the front g...

Certificate of Lawful Dev. - Proposed Southwark
16 Oct 2026 Under consideration/assessment 26/AP/2985

Arch 190 And 15-17 Park Street London Southwark SE1 9AB

Installation of two air condenser units and the display of 2 externally illuminated painted signs and an externally illuminated hanging sign. Replacem...

Minor application Southwark
15 Oct 2026 Under consideration/assessment 26/AP/2988

50 Avondale Rise London Southwark SE15 4AL

Construction of a single-storey ground floor side and rear extension, together with the erection of a detached garden room for ancillary domestic use.

Householder Application Southwark
15 Oct 2026 Under consideration/assessment 26/AP/2987

31 Clements Road London Southwark SE16 4DW

Proposed side infill extension to the rear of the property

Householder Application Southwark
15 Oct 2026 Under consideration/assessment 26/AP/3045

57 Aylesbury Road London Southwark SE17 2EQ

Replacement windows

Minor application Southwark
15 Oct 2026 Under consideration/assessment 26/AP/3035

3 Farrow Place London Southwark SE16 6QE

Construction of a rear dormer extension with the installation of 3 x rooflights to front roof slope and to raise ridge line by 328mm.

Householder Application Southwark
15 Oct 2026 Under consideration/assessment 26/AP/2924

89 John Ruskin Street London Southwark SE5 0PQ

Ground floor side and rear extension, loft conversion and extension, two rooflights to front roof slope, subdivision of existing dwelling to create 2 ...

Minor application Southwark
14 Oct 2026 Under consideration/assessment 26/AP/3024

5 Henslowe Road London Southwark SE22 0AP

Construction of a single storey rear extension

Householder Application Southwark
13 Oct 2026 Under consideration/assessment 26/AP/3017

39 Burrow Road London Southwark SE22 8DU

Ground floor front extension

Householder Application Southwark
13 Oct 2026 Under consideration/assessment 26/AP/3005

11 Champion Grove London Southwark SE5 8BN

Demolition of the existing 1980s rear extension and erection of a replacement single-storey rear extension.

Householder Application Southwark
13 Oct 2026 Under consideration/assessment 26/AP/3004

55 Playfield Crescent London Southwark SE22 8QR

Erection of cycle and refuse store within the front garden following removal of front boundary fence, including minor associated landscaping.

Householder Application Southwark
13 Oct 2026 Under consideration/assessment 26/AP/3001

21 Bywater Place London Southwark SE16 5ND

Erection of a single-storey rear extension at ground floor level and the construction of a dormer roof extension

Householder Application Southwark
13 Oct 2026 Under consideration/assessment 26/AP/2968

121 Hollydale Road London Southwark SE15 2TF

Certificate of lawfulness (proposed) for construction of a single storey garden room across the rear of the garden, not taller than 2.5m within 2m of ...

Certificate of Lawful Dev. - Proposed Southwark
12 Oct 2026 Under consideration/assessment 26/AP/2954

3B Canning Cross London Southwark SE5 8BH

Construction of a roof terrace at upper roof level with decking and 1.7m high obscured glass privacy screening to the front set back from the street e...

Householder Application Southwark
12 Oct 2026 Under consideration/assessment 26/AP/2790

Gedling Court Jamaica Road London Southwark SE1 2RN

Replacement of existing combustible external materials, including brickwork, metal spandrel panels, high-pressure laminate (HPL) cladding panels, timb...

Minor application Southwark
8 Oct 2026 Under consideration/assessment 26/AP/2965

13 Gowlett Road London Southwark SE15 4HX

Single storey rear extension, installation of rooflights to the front roof slope, reinstating the front door to its original position and installing s...

Householder Application Southwark
8 Oct 2026 Under consideration/assessment 26/AP/2957

160 Bellenden Road London Southwark SE15 4QY

Demolition of an existing single-storey rear extension, replacement of uPVC windows with double-glazed timber windows, installation of double-glazed t...

Householder Application Southwark
8 Oct 2026 Under consideration/assessment 26/AP/2953

1 Nairne Grove London Southwark SE24 9PU

Ground floor rear extension and removal of existing conservatory

Householder Application Southwark
8 Oct 2026 Under consideration/assessment 26/AP/2843

67A East Dulwich Grove London Southwark SE22 8PR

Construction of a single-storey side/rear extension, removal of a side-facing window at ground floor level, relocation of a side-facing window at grou...

Minor application Southwark
7 Oct 2026 Under consideration/assessment 26/AP/2949

Parkside Dulwich Common London Southwark SE21 7EU

Certificate of lawfulness (proposed) to install a new Air Source Heat Pump (ASHP) to service the existing semi-detached dwelling and this ASHP is to b...

Certificate of Lawful Dev. - Proposed Southwark
7 Oct 2026 Under consideration/assessment 26/AP/2947

80 Shenley Road London Southwark SE5 8NQ

Construction of a single-storey side extension at ground floor level, with glazing alterations to the side of the rear outrigger at first floor level,...

Householder Application Southwark
6 Oct 2026 Under consideration/assessment 26/AP/1382

361 - 367 Upland Road London Southwark SE22 0DR

Conversion of the existing hostel to residential use comprising 10 flats, including part single and two-storey rear extensions, internal alterations a...

Major application Southwark
6 Oct 2026 Under consideration/assessment 26/AP/2945

183 Rye Lane London Southwark SE15 4TP

Conversion of ancillary space at first floor into a self-contained residential dwelling and associated extension

Minor application Southwark
6 Oct 2026 Under consideration/assessment 26/AP/2942

25 Frogley Road London Southwark SE22 9DF

Construction of a ground floor side infill extension and façade alterations

Householder Application Southwark
6 Oct 2026 Under consideration/assessment 26/AP/2911

54 Lorrimore Road London Southwark SE17 3LZ

Construction of a single-storey, ground-floor side and rear extension, addition of a bathroom on first floor level, refurbishment of original windows,...

Householder Application Southwark
5 Oct 2026 Under consideration/assessment 26/AP/2923

9 Hambledon Place London Southwark SE21 7EY

Construction of a first floor rear extension and installation of a window.

Householder Application Southwark
5 Oct 2026 Withdrawn 23 Oct 26/AP/2922

7 Colwell Road London Southwark SE22 8QP

Certificate of lawfulness (proposed) for a single-storey, rear side extension.

Certificate of Lawful Dev. - Proposed Southwark
2 Oct 2026 Under consideration/assessment 26/AP/2905

29 Woodhall Drive London Southwark SE21 7HJ

Internal and external refurbishment of an existing detached dwelling including elevational alterations, replacement windows and doors, replacement of ...

Householder Application Southwark
2 Oct 2026 Under consideration/assessment 26/AP/2762

Maudsley Hospital Denmark Hill London Southwark SE5 8AZ

Renewal of the existing slate roof covering, replacing natural slate with compatible natural slate, also replacing lead flat roof areas with new lead ...

Minor application Southwark
2 Oct 2026 Under consideration/assessment 26/AP/2904

245B Peckham Rye London Southwark SE15 3AB

Proposed second floor rear extension, loft rear and front dormers, roof alterations.

Minor application Southwark
Recency
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1-2 months
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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, whether taller, larger or 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 those drawing a lot of comments, 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.