House extensions in Kensington and Chelsea

Kensington and Chelsea received 779 householder applications in the last 12 months - about 15 a week. Rear extensions and dormers are the most common. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

534 last 90 days
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145 last 30 days
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64 last 14 days

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Showing 50 of 534 applications
PP/26/03537 8 Jul 2026 Consultation

Flat A, 12 St Mark's Place, London, W11 1NT

Single storey conservatory extension

Kensington And Chelsea 8 Jul 2026
PP/26/02345 8 Jul 2026 Consultation

Flat 2, 75A Lower Sloane Street, London, SW1W 8DA

Proposal to erect timber roof with glass within perimeter of terrace with a timber privacy screen to be installed on left hand side of the terrace

Kensington And Chelsea 8 Jul 2026
LB/26/03370 7 Jul 2026 Consultation

85 Cornwall Gardens, London, SW7 4AY

Installation of Code 5 lead flashings to two courses of cornices on front elevation; the cornices are located to the portico and balcony at ground flo...

Kensington And Chelsea 7 Jul 2026
PP/26/03596 7 Jul 2026 Consultation

Flat B, 39 Hyde Park Gate, London, SW7 5DS

Change of use from one self-contained residential flat into two self-contained residential flats (Flat B1 and B2) including replacement windows at bas...

Kensington And Chelsea 7 Jul 2026
PP/26/03247 6 Jul 2026 Consultation

Ground Floor, 89 Golborne Road, London, W10 5NL

Installation of awning to front facade, installation of 3no air-conditioning units, 2no refrigerated condensation units and cold room in rear courtyar...

Kensington And Chelsea 6 Jul 2026
PP/26/03597 6 Jul 2026 Consultation

Basement Flat, 60 Stanhope Gardens, London, SW7 5RF

Internal alterations and external repair works including removal of non original inner wall in front room; relocation of door opening between corridor...

Kensington And Chelsea 6 Jul 2026
PP/25/03925 6 Jul 2026 Consultation

71 Golborne Road, London, W10 5NP

Maintenance works to building fabric. Replacement of single glazed timber sash windows on all elevations with double glazed timber sash units to match...

Kensington And Chelsea 6 Jul 2026
LB/26/03598 6 Jul 2026 Consultation

Basement Flat, 60 Stanhope Gardens, London, SW7 5RF

Internal alterations and external repair works including removal of non original inner wall in front room; relocation of door opening between corridor...

Kensington And Chelsea 6 Jul 2026
PP/26/02874 6 Jul 2026 Consultation

1-5 Chesterton Road, London, W10 5LY

Replacement windows with slim line double glazed timber sash units on front and rear elevations; renew rear door with hardwood timber door to match ex...

Kensington And Chelsea 6 Jul 2026
PP/25/03917 6 Jul 2026 Consultation

73 Golborne Road, London, W10 5NP

Maintenance works to building fabric. Replacement of single glazed timber sash windows on all elevations with double glazed timber sash units to match...

Kensington And Chelsea 6 Jul 2026
PP/26/03589 3 Jul 2026 Consultation

19A Princes Gate Mews, London, SW7 2PS

New roof raised to match No19, new skylights and roof alterations at rear; replacement of single glazed timber sash windows with new slimline double g...

Kensington And Chelsea 3 Jul 2026
PP/26/03588 3 Jul 2026 Consultation

19 Princes Gate Mews, London, SW7 2PS

Installation of new roof, skylights and roof alterations at rear; replacement of single glazed timber sash windows with slimline double glazed timber ...

Kensington And Chelsea 3 Jul 2026
LB/26/02753 3 Jul 2026 Consultation

Park Walk Primary School, Park Walk, London, SW10 0AY

Works to the external ancillary swimmimng pool building only: replacement of all existing windows and rooflights to uPVC; replacement of all external ...

Kensington And Chelsea 3 Jul 2026
PP/26/03587 3 Jul 2026 Consultation

38 Smith Terrace, London, SW3 4DH

Application for lowering of front door entrance steps to create level access; provision of a railing between no.38 and no.39; removal and replacement ...

Kensington And Chelsea 3 Jul 2026
PP/26/02752 3 Jul 2026 Consultation

Park Walk Primary School, Park Walk, London, SW10 0AY

Works to the external ancillary swimming pool building only: replacement of all existing windows and rooflights to uPVC; replacement of all external d...

Kensington And Chelsea 3 Jul 2026
CON/26/03593 3 Jul 2026 Consultation

12 Cathcart Road, London, SW10 9NN

Details required by condition 4 (protection of trees during construction) of planning permission PP/25/06731 (Proposed ground floor side and rear exte...

Kensington And Chelsea 3 Jul 2026
PP/26/03479 2 Jul 2026 Consultation

65 Park Walk, London, SW10 0AZ

Single storey rear extension in brickwork with rear aluminium doors

Kensington And Chelsea 2 Jul 2026
PP/26/03568 2 Jul 2026 Consultation

66 Addison Road, London, W14 8JL

Erection of a single storey rear extension at lower ground floor level with terrace above and steps to garden level, addition and extension of bay win...

Kensington And Chelsea 2 Jul 2026
PP/26/03173 2 Jul 2026 Consultation

23 The Boltons, London, SW10 9SU

Alteration of window to form secondary access door at lower ground-floor level within non-original extension

Kensington And Chelsea 2 Jul 2026
LB/26/03422 2 Jul 2026 Consultation

Museum, Victoria and Albert Museum, Cromwell Road, London, SW7 2RL

Repair and refurbishment of asphalt roof covering over Ironwork Galleries, including associated rooflights, upstands, flashings and localised elements...

Kensington And Chelsea 2 Jul 2026
LB/26/03174 2 Jul 2026 Consultation

23 The Boltons, London, SW10 9SU

Alteration of window to form secondary access door at lower ground-floor level within non-original extension

Kensington And Chelsea 2 Jul 2026
PP/25/03912 2 Jul 2026 Consultation

85 Golborne Road, London, W10 5NL

Maintenance works to building fabric; replacement of single glazed timber sash windows with double-glazed timber sash units to match existing; and rep...

Kensington And Chelsea 2 Jul 2026
PP/26/03333 2 Jul 2026 Consultation

1A Victoria Gardens, London, W11 3PE

Addition to roof above single storey existing dwelling, with basement, to create living accommodation with replacement ASHP

Kensington And Chelsea 2 Jul 2026
PP/26/03584 2 Jul 2026 Consultation

Basement Flat and House excluding Basement, 40 Markham Square, London, SW3 4XA

Replacement of windows, installation of new downpipe to front elevation; removal of existing external staircase and installation of new steel staircas...

Kensington And Chelsea 2 Jul 2026
PP/25/03911 2 Jul 2026 Consultation

83 Golborne Road, London, W10 5NL

Maintenance works to building fabric; replacement of single glazed timber sash windows with double-glazed timber sash units to match existing; and rep...

Kensington And Chelsea 2 Jul 2026
LB/26/03573 2 Jul 2026 Consultation

297 King's Road, London, SW3 5UG

Internal refurbishment works including removal of existing partitions, tea point and lighting, installation of new partitioning, new tea point and new...

Kensington And Chelsea 2 Jul 2026
PP/26/03569 2 Jul 2026 Consultation

Park International Hotel, 117-129 Cromwell Road, London, SW7 4DS

External alterations of installation of new UKPN substation with independent external access from Gaspar Close; installation of two external dry riser...

Kensington And Chelsea 2 Jul 2026
LB/26/03443 1 Jul 2026 Consultation

31 Edwardes Square, London, W8 6HH

Internal alterations comprising of removal of partition walls, renovation of bathroom, reversal of opening direction of doors, roof repair and associa...

Kensington And Chelsea 1 Jul 2026
PP/26/03507 1 Jul 2026 Consultation

36 Markham Street, London, SW3 3NR

Widening of front entrance steps. Installation of ASHP on roof (invisible from Markham Street). Additional rainwater downpipe and hopper to rainwater ...

Kensington And Chelsea 1 Jul 2026
PP/26/03029 1 Jul 2026 Consultation

Flat A, 47 Redcliffe Road, London, SW10 9NJ

Construction of part single-storey, part two-storey rear extensions, including alteration of the tiered rear garden

Kensington And Chelsea 1 Jul 2026
PP/26/03512 1 Jul 2026 Consultation

Public House, 100 Holland Park Avenue, London, W11 4UA

Installation of traditional manually operated fabric awnings to the front elevation of the public house

Kensington And Chelsea 1 Jul 2026
LB/26/03428 1 Jul 2026 Consultation

1 and 2 The Boltons, London, SW10 9TB

Reversion of single dwellinghouse to 2no. semi-detached dwellings, associated internal alterations and regularisation of other alterations. Rear exten...

Kensington And Chelsea 1 Jul 2026
PP/26/03427 1 Jul 2026 Consultation

1 and 2 The Boltons, London, SW10 9TB

Reversion of single dwellinghouse to 2no. semi-detached dwellings, associated internal alterations and regularisation of other alterations. Rear exten...

Kensington And Chelsea 1 Jul 2026
CL/26/03558 1 Jul 2026 Consultation

25 Adam And Eve Mews, London, W8 6UG

Proposed insertion of rear window. (Certificate of Lawful Use/Development)

Kensington And Chelsea 1 Jul 2026
PP/26/03457 1 Jul 2026 Consultation

69 Highlever Road, London, W10 6PR

Demolition and replacement of front walls to Nos 69 and 71

Kensington And Chelsea 1 Jul 2026
LB/26/03516 1 Jul 2026 Consultation

Tabernacle Community Centre, Powis Square, London, W11 2AY

Work to repair cracks following subsidence.

Kensington And Chelsea 1 Jul 2026
PP/26/03559 1 Jul 2026 Consultation

Flat 8, 22 Elm Park Gardens, London, SW10 9NY

Replacement of existing rear elevation window and door, to triple-glazed bifold door.

Kensington And Chelsea 1 Jul 2026
PP/26/03484 30 Jun 2026 Consultation

5 Raddington Road, London, W10 5TF

Proposed is for a rear extension with bi-fold doors and internal remodelling.

Kensington And Chelsea 30 Jun 2026
PP/26/03288 30 Jun 2026 Consultation

18 Farm Place, London, W8 7SX

Upward extension and remodelling to re-introduce heritage features to two storey terraced house.

Kensington And Chelsea 30 Jun 2026
PP/26/03458 30 Jun 2026 Consultation

5 Chester Cottages, Bourne Street, London, SW1W 8HG

Alterations to rear elevation, including replacement rear doors with larger four-panel door sets and first floor windows, repositioning of rooflight, ...

Kensington And Chelsea 30 Jun 2026
PP/26/03485 30 Jun 2026 Consultation

47 Hyde Park Gate, London, SW7 5DU

Replacement of existing garage door with a new garage door.

Kensington And Chelsea 30 Jun 2026
PP/26/03390 30 Jun 2026 Consultation

Basement and Ground Floor, 222-224 Westbourne Grove, London, W11 2RH

Installation of new retractable awning to front elevation; display of non-illuminated advertisements as follows: one new non-illuminated fascia sign; ...

Kensington And Chelsea 30 Jun 2026
LB/26/01821 30 Jun 2026 Consultation

Flat 4, 39 Holland Park, London, W11 3RP

Internal alterations, including moving kitchen; creation of two en-suite bathrooms; dado panelling installed. SVP installed to side elevation. (Retros...

Kensington And Chelsea 30 Jun 2026
CA/26/03391 30 Jun 2026 Consultation

Basement and Ground Floor, 222-224 Westbourne Grove, London, W11 2RH

Installation of new retractable awning to front elevation; display of non-illuminated advertisements as follows: one new non-illuminated fascia sign; ...

Kensington And Chelsea 30 Jun 2026
PP/26/03532 30 Jun 2026 Consultation

46-47 Cadogan Place, London, SW1X 9RU

Excavation and provision of basement extension beneath part of dwelling.

Kensington And Chelsea 30 Jun 2026
LB/26/03533 30 Jun 2026 Consultation

46-47 Cadogan Place, London, SW1X 9RU

Excavation and provision of basement extension beneath part of dwelling.

Kensington And Chelsea 30 Jun 2026
LB/26/03500 30 Jun 2026 Consultation

Flat 8, 44 Stanhope Gardens, London, SW7 5QY

Installation and replacement of recessed LED downlights throughout flat, within the existing modern plasterboard ceilings, including the replacement o...

Kensington And Chelsea 30 Jun 2026
PP/26/02800 29 Jun 2026 Consultation

55 Cornwall Crescent, London, W11 1PJ

Existing ground floor window to rear elevation to be removed and opening enlarged and new window installed to match existing

Kensington And Chelsea 29 Jun 2026
LB/26/03441 29 Jun 2026 Consultation

Flat 4, 39 Lennox Gardens, London, SW1X 0DF

Internal alterations, including regularization of unconsented works. Reconfiguration of roof including removal of dormers ,roof lights and constructio...

Kensington And Chelsea 29 Jun 2026
LB/26/03393 29 Jun 2026 Consultation

23 Royal Avenue, London, SW3 4QE

Rendering and painting of existing garden walls along with new hardwood fencing.

Kensington And Chelsea 29 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 Kensington and Chelsea?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Kensington and Chelsea. You can also narrow the alert to a postcode, street, or drawn area.

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