House extensions in Lewisham

Lewisham received 1,167 householder applications in the last 12 months - about 22 a week. Rear extensions and dormers are the most common. Of the 856 decided so far, 741 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

Date received
Get alerts for Lewisham

Filter applications

Date receivedLast 90 days
Date receivedLast 90 days
Select one year, or two for a range.
Number of homesAny
StatusAny
Application routeAny
Application type1 selected
KeywordsNone
Match

Matches words or phrases in the application address and description.

Showing 50 of 338 applications
Yesterday Registered DC/26/145072

18 Horsmonden Road, London, SE4 1RG

Construction of roof extension in the rear roof slope, installation of 2 roof lights in the front roof slope, together with a single-storey rear exten...

Householder Application Lewisham
23 Oct 2026 Registered DC/26/145771

First Floor Flat, 163 Waller Road, London, SE14 5LX

Installation of replacement slimline timber sash double-glazed windows on the front elevation; installation of replacement uPVC sash windows on the re...

Full Planning Permission Lewisham
22 Oct 2026 Registered DC/26/145828

92 Tyrwhitt Road, London, SE4 1QB

Construction of a single storey extension and proposed glazing in the rear, together with the removal of 2 windows in the side/rear elevation at 1st f...

Householder Application Lewisham
21 Oct 2026 Registered DC/26/145696

152 Marvels Lane, London, SE12 9PG

Application for a vehicular crossover and associated landscaping works at 152 Marvels Lane, SE12.

Householder Application Lewisham
21 Oct 2026 Registered DC/26/145581

68 Wearside Road, London, SE13 7UL

Demolition of the existing conservatory at the rear and construction of a single-storey rear extension and timber pergola, together with alterations t...

Householder Application Lewisham
21 Oct 2026 Registered DC/26/145016

180 Keedonwood Road, Bromley, BR1 4QP

Application for a Lawful Development Certificate (proposed) submitted under Section 192 of the Town & Country Planning Act 1990 (as amended) under Cla...

Lawful Development Certificate proposed Lewisham
20 Oct 2026 Registered DC/26/145844

27 Chudleigh Road, London, SE4 1JX

Construction of a single-storey side infill extension and boundary alterations at the rear of 27 Chudleigh Road SE4.

Householder Application Lewisham
20 Oct 2026 Registered DC/26/145740

167 Dartmouth Road, London, SE26 4RQ

External alterations and the installation of replacement doors, removal of window with door, a lantern skylight and timber cladding and fascia to the ...

Full Planning Permission Lewisham
19 Oct 2026 Registered DC/26/145564

46 Torridon Road, London, SE6 1AQ

Installation of a vehicular crossover to the front of 46 Torridon Road SE6.

Householder Application Lewisham
16 Oct 2026 Registered DC/26/145793

29 Linchmere Road, London, SE12 0NB

Construction of a rear extension featuring a sloped coated metal edging to suit existing material and a set of 5 coated aluminum doors at 29 Linchmere...

Householder Prior Approval Lewisham
16 Oct 2026 Registered DC/26/145798

146 Salehurst Road, London, SE4 1AP

Application for a Lawful Development Certificate (proposed) submitted under Section 192 of the Town & Country Planning Act 1990 (as amended) and Class...

Lawful Development Certificate proposed Lewisham
16 Oct 2026 Registered DC/26/145806

137 Conisborough Crescent, London, SE6 2SQ

Construction of a single storey rear extension at 137 Conisborough Crescent SE6.

Householder Application Lewisham
16 Oct 2026 Registered DC/26/145781

67 Algiers Road, London, SE13 7JD

Construction of a timber bike shed and removal of the existing bin store in the front garden at 67 Algiers Road, SE13

Householder Application Lewisham
16 Oct 2026 Registered DC/26/145705

80 Dennetts Road, London, SE14 5LJ

Retrospective planning permission for the construction of part single/part double extension to the rear, together with the installation of replacement...

Householder Application Lewisham
16 Oct 2026 Registered DC/26/145707

83 Sevenoaks Road, London, SE4 1RF

Application for a Lawful Development Certificate (proposed) submitted under Section 192 of the Town & Country Planning Act 1990 (as amended) Classes B...

Lawful Development Certificate proposed Lewisham
15 Oct 2026 Registered DC/26/145786

46 Winn Road, London, SE12 9EX

Retrospective application for the construction of a rear outbuilding at 46 Winn Road, SE12.

Householder Application Lewisham
15 Oct 2026 Registered DC/26/145773

266 Stanstead Road, London, SE23 1DE

Construction of a single storey side and rear extension at 266 Stanstead Road SE23.

Householder Application Lewisham
15 Oct 2026 Awaiting decision DC/26/145785

100 Merritt Road, London, SE4 1DX

Application for a Lawful Development Certificate (proposed) submitted under Section 192 of the Town & Country Planning Act 1990 (as amended) Classes A...

Lawful Development Certificate proposed Lewisham
14 Oct 2026 Registered DC/26/145778

77 De Frene Road, London, SE26 4AF

Construction of a single storey rear extension at 77 De Frene Road, SE6.

Householder Application Lewisham
14 Oct 2026 Registered DC/26/145769

47 Durham Hill, Bromley, BR1 5NF

Construction of a single-storey rear extension and rooflight on the rear elevation at 47 Durham Hill, BR1.

Householder Prior Approval Lewisham
14 Oct 2026 Registered DC/26/145766

32 Manor Lane Terrace, London, SE13 5QS

Construction of single-storey rear extension at 32 Manor Lane Terrace, SE13.

Householder Application Lewisham
14 Oct 2026 Registered DC/26/145770

20 Undercliff Road, London, SE13 7TT

Installation of replacement uPVC double-glazed windows on the front, rear and side elevations. Installation of two replacement composite doors on the ...

Full Planning Permission Lewisham
13 Oct 2026 Registered DC/26/145755

58 Newstead Road, London, SE12 0TB

Construction of a front porch and conversion of rear elevation door into window with floor plan resdesign at 58 Newstead Road, SE12.

Householder Application Lewisham
13 Oct 2026 Registered DC/26/145748

6 Hereford Gardens, Longhurst Road, London, SE13 5LU

Demolition of the existing lean-to and construction of a rear extension at 6 Hereford Gardens, SE13.

Householder Application Lewisham
13 Oct 2026 Registered DC/26/144624

10 Granville Park, London, SE13 7EA

Demolition and reconstruction of the front boundary wall, landscaping works to the rear patio including the construction of new retaining walls, repla...

Householder Application Lewisham
12 Oct 2026 Registered DC/26/145531

2 Algernon Road, London, SE13 7AT

Installation of replacement uPVC double-glazed windows on the front and rear elevations; installation of replacement composite door at the front eleva...

Full Planning Permission Lewisham
9 Oct 2026 Registered DC/26/145248

4 Tressillian Crescent, London, SE4 1QJ

Construction of an outbuilding in the rear garden and replacement of the existing rear extension doors with bi-fold doors and a picture window at 4 Tr...

Householder Application Lewisham
8 Oct 2026 Registered DC/26/145721

Blackheath Hospital - Outpatients Centre, Winchester House, Independents Road, London, SE3 9LF

Installation of six rooflights within the existing flat roof at Blackheath Hospital, Winchester House, Independents Road, SE3.

Full Planning Permission Lewisham
8 Oct 2026 Registered DC/26/145713

41 Bradgate Road, London, SE6 4TT

Application for a Lawful Development Certificate (proposed) submitted under Section 192 of the Town & Country Planning Act 1990 (as amended) Class A (...

Lawful Development Certificate proposed Lewisham
8 Oct 2026 Registered DC/26/145720

113 Jerningham Road, London, SE14 5NH

Installation of new entrance balustrade and railings, tilted path and steps, installation of replacement forecourt hardstanding, together with hard an...

Householder Application Lewisham
8 Oct 2026 Registered DC/26/145717

29 Hunsdon Road, London, SE14 5RD

Construction of a ground floor side extension to the rear at 29 Hunsdon Road, SE14 5RD.

Householder Application Lewisham
8 Oct 2026 Registered DC/26/145722

88 Longhurst Road, London, SE13 5LZ

Application for Prior Approval under Schedule 2, Part 1, Class A, Part (g) of the Town and Country Planning (General Permitted Development) Order 2015...

Householder Prior Approval Lewisham
8 Oct 2026 Awaiting decision DC/26/145723

88 Longhurst Road, London, SE13 5LZ

Application for a Lawful Development Certificate (proposed) submitted under Section 192 of the Town & Country Planning Act 1990 (as amended) Classes B...

Lawful Development Certificate proposed Lewisham
8 Oct 2026 Registered DC/26/145479

24a Tressillian Road, London, SE4 1YB

Construction of an outbuilding to the rear of the garden of Flat A, 24 Tressillian Road, SE4.

Full Planning Permission Lewisham
7 Oct 2026 Registered DC/26/145719

50 Beckenham Hill Road, Bromley, SE6 3NX

Construction of single-storey rear extension with rooflight at 50 Beckenham Hill Road, SE6.

Householder Application Lewisham
7 Oct 2026 Registered DC/26/145263

Units 1-11 and Units 221a. 221b & 221c Gateway House SE14 5JQ & 1a Lanchester Way, London, SE14 5HQ

Replacement of combustible materials to the external wall with non combustible alternatives to match existing appearance at Units 1-11 and Units 221a,...

Full Planning Permission Lewisham
6 Oct 2026 Registered DC/26/145688

9 Radford Road, London, SE13 6SB

Installation of replacement windows with double-glazed uPVC windows in the front, side and rear elevations, a composite door in the front elevation an...

Full Planning Permission Lewisham
6 Oct 2026 Registered DC/26/145686

18 Sydenham Park, London, SE26 4EQ

Installation of replacement windows with double-glazed timber windows in the front and rear elevations, and a timber door in the rear elevation to Fla...

Full Planning Permission Lewisham
6 Oct 2026 Registered DC/26/145694

43a Halesworth Road, London, SE13 7TJ

Construction of a single-storey rear extension at 43A Halesworth Road, SE13

Full Planning Permission Lewisham
6 Oct 2026 Registered DC/26/145684

William Wood House, Shrublands Close, London, SE26 4EG

Installation of replacement windows with double-glazed timber windows in the front, side and rear elevations and aluminium doors in the rear elevation...

Full Planning Permission Lewisham
6 Oct 2026 Registered DC/26/145678

19 Sydenham Park, London, SE26 4EE

Installation of replacement windows with double-glazed timber windows in the front and side elevations, and double-glazed UPVC windows and door in the...

Full Planning Permission Lewisham
6 Oct 2026 Registered DC/26/145690

53 Tyrwhitt Road, London, SE4 1QD

Installation of replacement uPVC double-glazed windows and a uPVC door to the rear elevation and timber windows to the front elevation at Flats A-D, 5...

Full Planning Permission Lewisham
6 Oct 2026 Registered DC/26/145680

53 Algiers Road, London, SE13 7JD

Installation of replacement uPVC windows, timber windows and uPVC doors to all elevations at 53 Algiers Road, SE13 7JD.

Full Planning Permission Lewisham
6 Oct 2026 Registered DC/26/145540

Unit 1, Deptford Trading Estate, Blackhorse Road, London, SE8 5HY

The installation of roof replacement at Unit 1, Deptford Trading Estate, Blackhorse Road, SE8

Full Planning Permission Lewisham
6 Oct 2026 Registered DC/26/145091

76 Oldstead Road, Bromley, BR1 5RJ

Demolition of the existing store building and construction of a single storey detached building for the use as an office/gymnasium in the rear garden ...

Full Planning Permission Lewisham
5 Oct 2026 Registered DC/26/145671

20 Canonbie Road, London, SE23 3AP

The installation of a roof light in the rear roof slope, together with alterations to the doors in the rear elevation and all associated works at 20 C...

Householder Application Lewisham
5 Oct 2026 Registered DC/26/145670

105 Arngask Road, London, SE6 1XZ

Conversion of existing window on the rear elevation into a door and convesion of existing door on rear elevation into window at 105 Arngask Road, SE6.

Lawful Development Certificate proposed Lewisham
5 Oct 2026 Registered DC/26/145676

28 Bargery Road, London, SE6 2LN

Construction of a single storey rear extension and attic conversion with rear dormer and installation of rooflights, and all associated works at 28 Ba...

Householder Application Lewisham
5 Oct 2026 Registered DC/26/145668

39 Farmstead Road, London, SE6 3EE

Construction of single-story rear extension with two rooflights on a sloped roof at 39 Farmstead Road, SE6.

Householder Prior Approval Lewisham
5 Oct 2026 Registered DC/26/145677

104 Algernon Road, London, SE13 7AW

Installation of replacement timber double-glazed windows on the front and side elevations and uPVC windows on the rear elevation; installation of repl...

Full Planning Permission Lewisham
Recency
Last 2 weeks
2-4 weeks
1-2 months
Older

Get free email alerts for new extensions applications in Lewisham

Set up alerts

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 Lewisham?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Lewisham. You can also narrow the alert to a postcode, street, or drawn area.

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