House extensions in Southwark

Southwark received 695 householder applications in the last 12 months - about 13 a week. Rear extensions and dormers are the most common. Of the 487 decided so far, 456 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 249 applications
Yesterday Under consideration/assessment 26/AP/2645

30 Tresco Road London Southwark SE15 3PX

Single storey side infill extension

Householder Application Southwark
Yesterday Under consideration/assessment 26/AP/2680

45 Oxley Close London Southwark SE1 5HF

Single storey ground floor rear extension.

Householder Application Southwark
Yesterday Under consideration/assessment 26/AP/2682

45 Oxley Close London Southwark SE1 5HF

Single storey ground floor rear extension and 1st floor rear extension with new gable pitched roof.

Householder Application Southwark
Yesterday Under consideration/assessment 26/AP/2688

9 Marmora Road London Southwark SE22 0RX

Prior approval for a single storey rear extension to semi-detached house

Large Home Extensions Southwark
Yesterday Under consideration/assessment 26/AP/2689

55 Worlingham Road London Southwark SE22 9HD

Single storey rear extension

Householder Application Southwark
Yesterday Under consideration/assessment 26/AP/2695

24 Ryedale London Southwark SE22 0QW

Loft conversion involving roof alterations, comprising a rear mansard roof extension and three roof lights on the front roof slope, with extension of ...

Householder Application Southwark
2 days ago Pending 26/AP/2681

27 St Francis Road London Southwark SE22 8DE

Construction of an L shaped dormer roof extension, including raising of the ridge, and installing velux windows to the front slope

Householder Application Southwark
2 days ago Pending 26/AP/2678

First Floor And Second Floor Flat 45 Charleston Street London Southwark SE17 1NG

Loft conversion and dormer extension

Minor application Southwark
9 Sept 2026 Pending 26/AP/2668

41 Highshore Road London Southwark SE15 5AF

- Replacement of existing garage with single storey extension and connection to the main house - Lowering and widening of rear lower ground floor wind...

Listed Building Consent Southwark
9 Sept 2026 Pending 26/AP/2520

8 Kinsale Road London Southwark SE15 4HL

Construction of an L-shaped dormer, an increase in the ridge height by 0.3 metres, and the installation of 2 no. rooflights within the front roofslope...

Householder Application Southwark
9 Sept 2026 Pending 26/AP/2662

22 Rodwell Road London Southwark SE22 9LF

Renewal of all windows and rear door

Householder Application Southwark
9 Sept 2026 Pending 26/AP/2667

41 Highshore Road London Southwark SE15 5AF

- Replacement of existing garage with single storey extension and connection to the main house - Lowering and widening of rear lower ground floor wind...

Householder Application Southwark
9 Sept 2026 Pending 26/AP/2677

6 Porlock Street London Southwark SE1 3RY

Prior approval notification (Schedule 2, Part 1, Class A) for the construction of a single-storey rear extension projecting 4 metres from the original...

Large Home Extensions Southwark
8 Sept 2026 Pending 26/AP/2574

23 Alberta Street London Southwark SE17 3SF

Certificate of lawfulness (proposed) for construction of a rear dormer and the installation of 1x rooflight to the front roofslope.

Certificate of Lawful Dev. - Proposed Southwark
8 Sept 2026 Pending 26/AP/2659

23B Adys Road London Southwark SE15 4DX

Rear dormer with 2no. rooflights on front slope plus a roof terrace over part of rear addition roof

Minor application Southwark
8 Sept 2026 Pending 26/AP/2660

Vintage Yard 59 - 63 Bermondsey Street London Southwark SE1 3XF

Installation of replacement rooftop and replacement low level roof plant, elevation alterations to include the removal of existing entrance gate and r...

Minor application Southwark
8 Sept 2026 Pending 26/AP/2558

57 -61 Union Street London Southwark SE1 1SG

Alterations to the Grade II listed building at 59-61 Union Street comprising adaptation of the existing roof space to provide additional office accomm...

Minor application Southwark
7 Sept 2026 Pending 26/AP/2514

Flat E 2 Transom Close London Southwark SE16 7FH

Replacement of existing timber windows with uPVC windows.

Minor application Southwark
7 Sept 2026 Pending 26/AP/2601

49 Henshaw Street London Southwark SE17 1PE

Demolition of existing rear extension and construction of part single, part two storey rear extension and erection of roof terrace on main roof with b...

Householder Application Southwark
7 Sept 2026 Pending 26/AP/1925

54 And 56 Peckham Rye London Southwark SE15 4JR

Construction of a mansard roof extension along with roof terrace area across the existing roof spaces of 54 and 56 Peckham Rye to create a new 1b2p se...

Minor application Southwark
4 Sept 2026 Pending 26/AP/2621

54 Goodrich Road London Southwark SE22 0EQ

Rear roof and ground floor extensions, together with minor amendments to existing upper-floor openings. Installation of two rooflights to the front ro...

Householder Application Southwark
3 Sept 2026 Pending 26/AP/2405

40 Strathnairn Street London Southwark SE1 5BL

Construction of a single-storey rear extension, rear dormer loft conversion with a Juliet balcony, and replacement of existing first-floor rear window...

Householder Application Southwark
3 Sept 2026 Pending 26/AP/2535

12 Buckstone Close London Southwark SE23 3QT

Construction of a two storey side extension

Householder Application Southwark
3 Sept 2026 Pending 26/AP/2545

76 Shenley Road London Southwark SE5 8NQ

The erection of a single story extension to the rear of the property and a dormer extension to the rear gable roof of the property. The single story L...

Householder Application Southwark
3 Sept 2026 Pending 26/AP/2607

7 Soames Street London Southwark SE15 4BZ

Certificate of lawfulness (proposed) for the construction of a single storey rear side infill extension.

Certificate of Lawful Dev. - Proposed Southwark
3 Sept 2026 Under consideration/assessment 26/AP/2337

Gaumont House 1 Staffordshire Street London Southwark SE15 5TS

Fire safety remediation works including the replacement of existing combustible timber decking with a non-combustible aluminium decking system, replac...

Minor application Southwark
3 Sept 2026 Pending 26/AP/2517

65 Calton Avenue London Southwark SE21 7DF

Construction of a ground-floor side-rear extension with terrace reinstated above; alterations to the rear outrigger, including raising the eaves and r...

Householder Application Southwark
2 Sept 2026 Approved 26/AP/2562

Flat 18 St Saviours Wharf 23 Mill Street London Southwark SE1 2BE

Removal of a non-loadbearing stud partition wall between the kitchen and hallway, with associated making good of adjoining floor, wall and ceiling fin...

Certificate of Lawfulness - Listed Bldng Southwark
2 Sept 2026 Pending 26/AP/2499

48 Keston Road London Southwark SE15 4JB

Construction of a single storey side infill and rear extension to form a 'L' shaped wrap around extension.

Householder Application Southwark
2 Sept 2026 Pending 26/AP/2575

11A Landcroft Road London Southwark SE22 9LQ

Construction of ground floor wrap-around extension and outbuilding to rear garden

Minor application Southwark
2 Sept 2026 Pending 26/AP/2600

3 Royal George Mews London Southwark SE5 8FD

Proposed single-storey side extension, internal reconfiguration and refurbishment, replacement windows and doors, roof refurbishment including solar p...

Householder Application Southwark
2 Sept 2026 Pending 26/AP/2436

7B Plough Way London Southwark SE16 2LS

Construction of a mansard roof extension, together with the raising the party parapet walls and chimney stack.

Minor application Southwark
2 Sept 2026 Pending 26/AP/2406

22 Forest Hill Road London Southwark SE22 0RR

Change of use of the rear of the ground floor from retail (Class E) to residential (Class C3) to create a 1 bedroom studio flat; and the retention of ...

Minor application Southwark
1 Sept 2026 Pending 26/AP/2453

54 Hanover Park London Southwark SE15 5HS

Proposed single storey front porch

Householder Application Southwark
1 Sept 2026 Pending 26/AP/2564

37 Stradella Road London Southwark SE24 9HN

Certificate of lawfulness (proposed) for ground floor front infill of existing recessed undercroft / former garage space, set back by 200mm from the p...

Certificate of Lawful Dev. - Proposed Southwark
28 Aug 2026 Pending 26/AP/2450

141 Friern Road London Southwark SE22 0AZ

Construction of an L-shaped dormer; installation of three rooflights to front roof slope and installation of a side facing window.

Householder Application Southwark
28 Aug 2026 Under consideration/assessment 26/AP/2500

27 Fellbrigg Road London Southwark SE22 9HQ

Construction of L-shaped dormer to the rear, together with raising the ridge by 400mm, installation of 2no. rooflights in front roof slope, and 1no. u...

Householder Application Southwark
28 Aug 2026 Pending 26/AP/2511

13 Hawkslade Road London Southwark SE15 3DQ

Construction of an L-shaped dormer loft extension witha a raised ridge of 0.4m and the construction of a roof terrace to the rear and the installation...

Householder Application Southwark
28 Aug 2026 Pending 26/AP/2550

4 Omeara Street London Southwark SE1 1TE

Facade and internal alterations to improve the theatre and office building, including new doors and windows, accessibility improvements, signage updat...

Minor application Southwark
28 Aug 2026 Under consideration/assessment 26/AP/2552

160 Upland Road London Southwark SE22 0DQ

Construction of a ground floor side infill extension: L-shaped dormer extension; Installation of a side facing window on dormer outrigger and refurbis...

Householder Application Southwark
28 Aug 2026 Under consideration/assessment 26/AP/2554

9 Oxonian Street London Southwark SE22 8HR

Certificate of lawfulness (proposed) for erection of a rear roof dormer and installation of two rooflights to the front roof slope to facilitate a lof...

Certificate of Lawful Dev. - Proposed Southwark
28 Aug 2026 Under consideration/assessment 26/AP/2553

Ground Floor Flat 67 Avondale Rise London Southwark SE15 4AJ

Construction of a single-storey rear extension and alterations to rear ground floor fenestration.

Minor application Southwark
27 Aug 2026 Decided 26/AP/2546

36 Chadwick Road London Southwark SE15 4RA

Replacement of the existing white single-glazed timber casement and sash windows with new white slimline double-glazed timber casement and sash window...

Minor application Southwark
26 Aug 2026 Pending 26/AP/2414

First Floor Flat 176 - 178 Old Kent Road London Southwark SE1 5TY

Proposed single storey first floor rear extension

Minor application Southwark
26 Aug 2026 Under consideration/assessment 26/AP/2533

28 Tyrrell Road London Southwark SE22 9NE

Demolition of outbuilding and construction of new rear extension and minor internal alterations

Householder Application Southwark
26 Aug 2026 Under consideration/assessment 26/AP/2534

1 Sartor Road And 62 Borland Road London Southwark SE15 3BB

Replacement of the existing double-glazed timber casement windows with new white double-glazed UPVC casement windows. Replacement of the existing timb...

Minor application Southwark
25 Aug 2026 Under consideration/assessment 26/AP/1963

224A Tower Bridge Road London Southwark SE1 2UP

Installation of a lightweight aluminum structure enclosure featuring a motorized glass fully retractable roof, sliding glass windows at the rear of th...

Minor application Southwark
25 Aug 2026 Under consideration/assessment 26/AP/2468

Crowne House 56 - 58 Southwark Street London Southwark SE1 1UN

Refurbishment of existing facade with an enlarged front entrance to provide enhanced arrival experience and DDA access.

Minor application Southwark
25 Aug 2026 Under consideration/assessment 26/AP/2518

3 Berryfield Road London Southwark SE17 3QE

Lawful Development Certificate (Proposed ) for Construction of a single-storey rear extension extending 3.0 metres beyond the original rear wall follo...

Certificate of Lawful Dev. - Proposed Southwark
24 Aug 2026 Under consideration/assessment 26/AP/2297

38-42 Snowsfields And 62 - 64 (Evens) Weston Street London Southwark SE1 3SU

Replacement of 5 main entrance doors and frames (including glazed panels above) with new timber doors and frames.

Minor application Southwark
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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.