House extensions in Camden

Camden received 719 householder applications in the last 12 months - about 14 a week. Rear extensions and dormers are the most common. Of the 119 decided so far, 114 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 323 applications
2 days ago REGISTERED 2026/3888/P

Unit A, Ground Floor West 3-5 Bleeding Heart Yard London EC1N 8SJ

Replace solid metal ground floor entrance door with glazed entrance door (Retrospective).

Full Planning Permission Camden
2 days ago REGISTERED 2026/3836/P

13 Hampstead Hill Gardens London NW3 2PH

Erection of a single storey lower ground floor rear extension following demolition of existing orangery, installation of enlarged rooflight at rear ro...

Householder Application Camden
2 days ago REGISTERED 2026/3826/L

Belsize Park Firehouse, Flat 5 36 Lancaster Grove London NW3 4PB

External alterations to landscaping, including the replacement of timber garden shed with new, relocated brick enclosure, stepped garden levels and wa...

Listed Building Consent Camden
2 days ago REGISTERED 2026/3718/P

7, Allison Court 43 Parkhill Road London NW3 2YD

Installation of white external solar / heat reflective blinds to 2nd floor rear windows, fitted immediately below eaves soffit within window reveals.

Certificate of Lawfulness (Proposed) Camden
2 days ago REGISTERED 2026/3649/L

83 Highgate West Hill London N6 6LU

Proposed internal alterations including adding secondary glazing to windows internally and reconfigurations of floor layouts, erection of two rear dor...

Listed Building Consent Camden
2 days ago REGISTERED 2026/3627/P

83 Highgate West Hill London N6 6LU

Erection of two rear dormers replacing the existing rear dormer, removal of the existing triangular front dormer, replacement of existing handrails wi...

Householder Application Camden
2 days ago REGISTERED 2026/3206/P

Belsize Park Firehouse, Flat 5 36 Lancaster Grove London NW3 4PB

Alterations to landscaping, including the replacement of timber garden shed with new, relocated brick enclosure, stepped garden levels and water featu...

Full Planning Permission Camden
2 days ago REGISTERED 2026/3189/P

31A Camden Mews London NW1 9BY

Amendment to the position of the door at rear roof level and additional rooflight to roof extension approved under planning permission 2025/2116/P dat...

Non-Material Amendments Camden
2 days ago New application 2026/1614/P

3 Heath Villas Vale of health London NW3 1AW

M3 and BOPS - Single storey basement utility room extension measuring 4.5m x 3.2m below the middle third footprint of the Lower Ground Floor plan acce...

Certificate of Lawfulness (Existing) Camden
2 days ago Appeal Lodged 2026/0435/P

12 Park Village West London NW1 4AE

The construction of garden outbuildings and associated landscape works, including new retaining walls and garden gate

Householder Application Camden
8 Sept 2026 REGISTERED 2026/3886/P

27 Glenmore Road London NW3 4BY

Erection of an additional dormer to the rear roof, repositioning of two existing rooflights within the front roof and associated roof works.

Householder Application Camden
8 Sept 2026 REGISTERED 2026/3876/P

Blocks A, B & C Melrose Apartments 6 Winchester Road London NW3 3JJ

Removal of the majority of the existing external facing cladding and materials and installation of replacement cladding and materials to external elev...

Full Planning Permission Camden
8 Sept 2026 REGISTERED 2026/3853/P

45 Heath Hurst Road London NW3 2RU

Installation of 1 no. new additional timber framed double glazed window and replacement of 1 no. existing door with a new timber framed double glazed ...

Householder Application Camden
8 Sept 2026 REGISTERED 2026/3831/P

40 Leighton Grove London NW5 2QP

Replacement of existing timber single-glazed sliding sash windows to front and rear elevations with matching timber heritage-style double-glazed sash ...

Certificate of Lawfulness (Proposed) Camden
8 Sept 2026 REGISTERED 2026/3833/P

Flat 1st And 2nd Floor 326 Kentish Town Road London NW5 2TH

Erection of a replacement single storey rear infill extension and alterations to main roof.

Full Planning Permission Camden
8 Sept 2026 REGISTERED 2026/3827/P

36 Leighton Grove London NW5 2QP

Replacement of existing timber single-glazed sliding sash windows to front and rear elevations with matching timber heritage-style double-glazed sash ...

Certificate of Lawfulness (Proposed) Camden
8 Sept 2026 REGISTERED 2026/3785/P

15 Elliott Square London NW3 3SU

Erection of a single storey rear extension.

GPDO Prior Approval Class A Householder extensions set out by Schedule 2, Part 1, Class A of the Town and Country Planning (General Permitted Development) Order 2015 Camden
7 Sept 2026 REGISTERED 2026/3619/P

9 Rosecroft Avenue London NW3 7QA

Proposed garage conversion with associated elevational alterations, erection of first floor front extension and alterations to existing roof, and alte...

Householder Application Camden
7 Sept 2026 REGISTERED 2026/3556/L

Ground Floor Flat 19 Frognal Lane London NW3 7DB

Free standing bath in principal bedroom and associated alterations. Creation of a utility room to bathroom and associated alterations.

Listed Building Consent Camden
7 Sept 2026 REGISTERED 2026/3481/P

9 St Paul's Mews London NW1 9TZ

Repair and refurbish the five existing front-of-house sash windows, replacing the single glazing with double glazing.

Certificate of Lawfulness (Proposed) Camden
7 Sept 2026 REGISTERED 2026/3464/P

Flat 1st Floor 6 Hilltop Road London NW6 2PY

Use of external area on top of projecting angular rear bay as a balcony.

Certificate of Lawfulness (Existing) Camden
6 Sept 2026 REGISTERED 2026/3832/P

Flat 1 149 Broadhurst Gardens London NW6 3BE

Erection of ground floor single storey rear infill extension and replacement of existing window with an access door to side elevation.

Full Planning Permission Camden
6 Sept 2026 REGISTERED 2026/3818/P

8 Broadhurst Close London NW6 3QS

Erection of a single storey ground floor side extension

Householder Application Camden
6 Sept 2026 REGISTERED 2026/3809/P

2 Fellows Road London NW3 3LP

Amalgamation of existing two flats into one single dwellinghouse (Class C3); garage conversion to habitable space; infill extension at front lower gro...

Full Planning Permission Camden
6 Sept 2026 REGISTERED 2026/3802/L

Land Bounded by Maple Street, Cleveland Mews, Howland Street and Cleveland Street London W1T 4JZ

External refurbishment and restoration of the BT Tower including facade replacement and replacement of glazed units; new stair core; insertion of seco...

Listed Building Consent Camden
6 Sept 2026 REGISTERED 2026/3799/P

Land Bounded by Maple Street, Cleveland Mews, Howland Street and Cleveland Street London W1T 4JZ

Refurbishment including external alterations to the BT Tower; partial demolition, remodelling and extension of the Base (Podium, Howland Building and ...

Full Planning Permission Camden
6 Sept 2026 REGISTERED 2026/3790/L

90 Great Russell Street London Camden WC1B 3PS

Change of use from non-residential use (Class F1) to flexible use as offices (Class E) or non-residential use (Class F1), internal and external altera...

Listed Building Consent Camden
6 Sept 2026 REGISTERED 2026/3783/P

22 Gladys Road London Camden NW6 2PX

Replacement of roof and increase in roof and parapet height of up to 250 mm for the purposes of installing installation.

Full Planning Permission Camden
6 Sept 2026 REGISTERED 2026/3636/P

17 Lady Margaret Road London NW5 2NG

Erection of a timber garden room for use as home gym, sauna and garden store.

Householder Application Camden
6 Sept 2026 REGISTERED 2026/3300/P

90 Great Russell Street London Camden WC1B 3PS

Change of use from non-residential use (Class F1) to flexible use as offices (Class E) or non-residential use (Class F1), internal and external altera...

Full Planning Permission Camden
6 Sept 2026 Appeal Lodged 2026/2146/P

35 Willes Road London NW5 3DN

Installation of frameless glass three-dimensional skylight to the rear pitch of butterfly roof.

Householder Application Camden
3 Sept 2026 REGISTERED 2026/3635/P

9 Rosecroft Avenue London NW3 7QA

Proposed remodelling of the rear elevation to include ground floor raised terrace, replacement balustrades, new stairs from first floor to garden leve...

Householder Application Camden
3 Sept 2026 REGISTERED 2026/3568/P

41 & 43 King Henry's Road London NW3 3QR

Amalgamation of flat 41 A and B into single dwelling maisonette.

Certificate of Lawfulness (Proposed) Camden
3 Sept 2026 REGISTERED 2026/2946/L

Flat 1, 73 Eton Avenue London NW3 3EU

Replacement of existing defective rear lean-to conservatory with a new slimline powder-coated aluminium framed conservatory with clear double glazing,...

Listed Building Consent Camden
3 Sept 2026 REGISTERED 2026/2697/P

Flat 1, 73 Eton Avenue London NW3 3EU

Replacement of existing defective rear lean-to conservatory with a new slimline powder-coated aluminium framed conservatory with clear double glazing,...

Full Planning Permission Camden
3 Sept 2026 REGISTERED 2026/2492/P

28-30 Little Russell Street London Camden WC1A 2HN

Replacement of the roof finishes on 28-30 Little Russell Street; installation of a new perimeter guardrail on floors 4 and 5 and at roof level and oth...

Full Planning Permission Camden
2 Sept 2026 New application 2026/3782/P

The Old Hall Cottage 4B Kidderpore Avenue London NW3 7SP

Erection of a roof extension incorporating an enlarged roof addition above the front stairwell with a flush metal-framed rooflights, removal of pebble...

Full Planning Permission Camden
2 Sept 2026 New application 2026/3775/P

8 Tasker Road London NW3 2YB

Demolition of existing bin store and construction of a new part one/two storey front extension, addition of new fenestrations to the north, east and s...

Householder Application Camden
2 Sept 2026 New application 2026/3761/P

45 Ornan Road London NW3 4QD

Erection of a first floor rear extension above existing ground floor rear extension.

Householder Application Camden
2 Sept 2026 New application 2026/3562/P

55 Ornan Road London NW3 4QD

Construction of an additional storey to the principal part of the existing two-storey dwellinghouse.

GPDO Prior Approval Determination Camden
1 Sept 2026 New application 2026/3773/L

47 Kelly Street London NW1 8PG

Replacement of concrete roof tiles with slate roof tiles (Retrospective)

Listed Building Consent Camden
1 Sept 2026 New application 2026/3741/P

19 Bisham Gardens London N6 6DJ

Erectionof a single storey rear extension, replacement of existing side return extension roof with glazed roof and alteration to front boundary wall t...

Householder Application Camden
1 Sept 2026 New application 2026/3724/P

47 Kelly Street London NW1 8PG

Replacement of concrete roof tiles with slate roof tiles (Retrospective)

Householder Application Camden
1 Sept 2026 New application 2026/3606/P

29 Solent Road London NW6 1TP

BOPS & M3 - 26-00348-HRET - Retrospective application for the installation of a bicycle storage unit to the front elevation

Householder Application Camden
1 Sept 2026 New application 2026/3516/P

36 Estelle Road London NW3 2JY

Retile roof with grey slate, construct dormer at rear, replace windows, install 2 rooflights to front and 1 rooflight to rear elevations, install walk...

Full Planning Permission Camden
1 Sept 2026 New application 2026/3264/P

15 Edis Street London NW1 8LE

Conversion of x3 flats to a single family dwellinghouse, erection of roof extension and two storey rear extension, replacement brick piers to the fron...

Full Planning Permission Camden
31 Aug 2026 New application 2026/3729/P

153 King Henry's Road London NW3 3RD

Erection of a single storey rear extension, installation of a rear dormer and a side dormer and replacement of existing windows and doors with double ...

Householder Application Camden
31 Aug 2026 New application 2026/3613/P

Dragon Court 27-29 Macklin Street London WC2B 5LX

Installation of a metal gate and fence; and installation of 4 no. additional Sheffield bicycle stands

Full Planning Permission Camden
31 Aug 2026 New application 2026/3591/P

22 Ulysses Road London NW6 1EE

Erection of an outbuilding within rear garden.

Certificate of Lawfulness (Proposed) Camden
31 Aug 2026 Refused 2025/5234/P

14 Greenaway Gardens London NW3 7DH

Erection of a single storey glazed roof rear extension.

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

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