House extensions in Kensington and Chelsea

Kensington and Chelsea received 1,675 householder applications in the last 12 months - about 32 a week. Rear extensions and dormers are the most common. Of the 1,277 decided so far, 1,218 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 357 applications
22 Oct 2026 Consultation PP/26/05551

Flat 5, King's Mansions, Lawrence Street, London, SW3 5ND

Replacement of 9no timber windows at 2nd floor level

Planning Permission Kensington And Chelsea
22 Oct 2026 Consultation CL/26/05693

38 Dalgarno Gardens, London, W10 6AB

Provision of timber French door and alteration of window to door on rear elevation. (Certificate of Lawful Proposed Use or Development)

Certificates Lawful Proposed Use or Dev. Kensington And Chelsea
22 Oct 2026 Consultation PP/26/04543

Basement Flat, 24 Westgate Terrace, London, SW10 9BJ

Construction of single storey partial rear extension

Planning Permission Kensington And Chelsea
22 Oct 2026 Consultation PP/26/04544

First Floor Flat, 24 Westgate Terrace, London, SW10 9BJ

Construction of 3.5m first floor rear extension

Kensington And Chelsea
21 Oct 2026 Consultation PP/26/05682

65 Elgin Crescent, London, W11 2JE

Installation of pedestrian gate and entrance, and external platform lift to basement level, including associated works

Planning Permission Kensington And Chelsea
21 Oct 2026 Consultation PP/26/05715

51 St Mary Abbot's Terrace, London, W14 8NX

Formation of new loft extension; installation of new lift; formation of new front courtyard to basement; construction of new rear extension, new basem...

Planning Permission Kensington And Chelsea
21 Oct 2026 Consultation PP/26/05714

7 Redcliffe Road, London, SW10 9NR

Extension of second floor rear closet wing, to align with that of the floor below and to the rear building line of No. 8 Redcliffe Road

Planning Permission Kensington And Chelsea
21 Oct 2026 Consultation PP/26/05683

65-69 Pottery Lane, London, W11 4NA

Installation of retractable flat glass roof at roof level above main staircase, incorporating access hatch for maintenance purposes.

Planning Permission Kensington And Chelsea
21 Oct 2026 Consultation PP/26/05571

Flat B, 4 Sunningdale Gardens, London, W8 6PX

Installation of external rainwater gutters and downpipes on front fa?ade, on bay window of building

Planning Permission Kensington And Chelsea
21 Oct 2026 Consultation LB/26/05690

9 Cromwell Place, London

Boxing in of internal pipework

Listed Building Consent Kensington And Chelsea
21 Oct 2026 Consultation PP/26/05626

22-28 Basil Street, London, SW3 1AT

Replacement external entry doors, surround and steps at main entrance within No.22 Basil Street; replacement of entrances to Nos.24-28 Basil Street; r...

Planning Permission Kensington And Chelsea
21 Oct 2026 Consultation LB/26/05599

29 Cadogan Square, London, SW1X 0HU

Further to Fire Door Survey, upgrade to internal doors, frames and vault doors is necessary, to make them fire resistant to comply with with Fire Regu...

Listed Building Consent Kensington And Chelsea
21 Oct 2026 Consultation PP/26/05623

Excluding Flat A, 40 Gordon Place, London, W8 4JF

Demolition and replacement of single storey side extension, installation of replacement window

Planning Permission Kensington And Chelsea
21 Oct 2026 Consultation PP/26/05539

Ground Floor Flat, 22 Kelfield Gardens, London, W10 6NB

Erection of single storey side and rear extension to ground floor flat, together with internal refurbishment works

Planning Permission Kensington And Chelsea
21 Oct 2026 Consultation PP/26/05627

22 Astell Street, London, SW3 3RU

First and second floor rear extension and associated works

Planning Permission Kensington And Chelsea
21 Oct 2026 Consultation LB/26/05564

Flat A, 61 Stanhope Gardens, London, SW7 5RF

Internal alterations and remedial works, together with repair, restoration and refurbishment works to lower ground floor flat (Retrospective Applicati...

Listed Building Consent Kensington And Chelsea
20 Oct 2026 Consultation CL/26/05369

53 Elsham Road, London, W14 8HD

Internal alterations, to alter configuration of HMO rooms, to provide improvements to the living accommodation. (Certificate of Proposed Use/Developme...

Certificates Lawful Proposed Use or Dev. Kensington And Chelsea
20 Oct 2026 Consultation PC/26/05656

244 Acklam Road, London, W10 5YG

Permission sought for a pavement crossover and general arrangement.

Pavement Crossover Kensington And Chelsea
20 Oct 2026 Consultation LB/26/05520

Flat 8, 75 Holland Park, London, W11 3SL

Replacement of kitchen, replacement of freestanding bookcases, replacement of modern square edged skirting to traditional torus skirting and door arch...

Listed Building Consent Kensington And Chelsea
20 Oct 2026 Consultation LB/26/05574

Flat 3, 67 Onslow Gardens, London, SW7 3QD

Internal refurbishment to first floor flat

Listed Building Consent Kensington And Chelsea
19 Oct 2026 Consultation PP/26/05654

Natural History Museum, Cromwell Road, London, SW7 5BD

Installation of new external condenser unit and pipework, replacement of non-original entrance door and overlight, external works to the North elevati...

Planning Permission Kensington And Chelsea
19 Oct 2026 Consultation PP/26/05652

26 Holland Villas Road, London, W14 8DH

Alterations to the roof to form an additional floor of accommodation to match adjacent houses

Planning Permission Kensington And Chelsea
19 Oct 2026 Consultation PP/26/05568

14 Sprimont Place, London, SW3 3HU

Installation of 22mm mild steel or iron railings finished black to match existing along left boundary of rear entrance path

Planning Permission Kensington And Chelsea
19 Oct 2026 Consultation PP/26/05537

The Terrace Flat, 8 Sloane Street, London, SW1X 9LE

Addition of rear extension, previously granted in August 2006 and in January 2020, retaining generous space for terrace. Replacement of terrace doors ...

Planning Permission Kensington And Chelsea
19 Oct 2026 Consultation PP/26/05538

66 Redcliffe Road, London, SW10 9NQ

Construction of single-storey rear extension at lower ground floor level; replacement conservatory; replacement external staircase; replacement garden...

Planning Permission Kensington And Chelsea
19 Oct 2026 Consultation PP/26/04048

30 Warwick Road, SW5 9UB and 58 Penywern Road, London, SW5 9SX

Retention of single-storey outbuilding with two rooflights in rear garden (Retrospective application)

Planning Permission Kensington And Chelsea
16 Oct 2026 Consultation PP/26/05450

Flat 2, 208 Ladbroke Grove, London, W10 5LU

Replacement of three single-glazed timber sash windows in front bay with matching slimline double glazing white-painted timber sashes, relocating boil...

Planning Permission Kensington And Chelsea
15 Oct 2026 Consultation PP/26/01786

42 Lowndes Square, London, SW1X 9JL

Installation of painted steel handrail to one side of external stair to front entrance

Planning Permission Kensington And Chelsea
14 Oct 2026 Consultation LB/26/05562

Glendower School, 87 Queen's Gate, London, SW7 5JX

External fabric investigation, conservation and repair works. Internal drainage investigation and repairs. Amendment of drainage outlet and additional...

Listed Building Consent Kensington And Chelsea
14 Oct 2026 Consultation PP/26/05600

50 Hans Crescent and 79 Brompton Road, London, SW1X / SW3

External alterations to the ground floor elevations fronting 50 Hans Crescent and 79 Brompton Road.

Planning Permission Kensington And Chelsea
14 Oct 2026 Consultation PP/26/05561

Glendower School, 87 Queen's Gate, London, SW7 5JX

External fabric investigation, conservation and repair works. Internal drainage investigation and repairs. Amendment of drainage outlet and additional...

Planning Permission Kensington And Chelsea
14 Oct 2026 Consultation LB/26/05560

44 Tite Street, London, SW3 4JA

Minor internal alterations and redecoration including: replacement of floor finishes; refitting of bathrooms and kitchens; and installation of interna...

Listed Building Consent Kensington And Chelsea
14 Oct 2026 Consultation PP/26/05559

44 Tite Street, London, SW3 4JA

Minor internal alterations and redecoration including: replacement of floor finishes; refitting of bathrooms and kitchens; and installation of interna...

Planning Permission Kensington And Chelsea
14 Oct 2026 Consultation PP/26/04888

10 Cadogan Square, London, SW1X 0JU

Works comprise recovering an existing lead finished flat roof with new lead. As part of works insulation and ventilation will be incorporated into bui...

Planning Permission Kensington And Chelsea
14 Oct 2026 Consultation PP/26/05517

Golborne Medical Centre, 12-16 Golborne Road, London, W10 5PE

Alterations to rear elevation and installation of rear external plant housing

Planning Permission Kensington And Chelsea
13 Oct 2026 Consultation PP/26/05610

1 Cheyne Gardens, London, SW3 5QU

Removal of existing enclosure housing mechanical air-conditioning equipment serving the dwelling and its replacement with a purpose-designed acoustic ...

Planning Permission Kensington And Chelsea
13 Oct 2026 Consultation PP/26/05550

137 Old Church Street, London, SW3 6EB

Installation of a garden gazebo in the rear of the garden

Planning Permission Kensington And Chelsea
13 Oct 2026 Consultation LB/26/05313

26A Cadogan Square, London, SW1X 0JP

Internal alterations at ground and basement level comprising a new glazed partition to the front basement space, a new fireplace to the basement, new ...

Listed Building Consent Kensington And Chelsea
13 Oct 2026 Consultation CL/26/05532

Flat 3, 65 Holland Park, London, W11 3SJ

Internal alterations to flat on raised ground floor and boiler cupboard located on the 1st floor (Certificate of Lawful Proposed Works to a Listed Bui...

Certificate of Lawfulness LB only Kensington And Chelsea
13 Oct 2026 Consultation PP/26/05448

1 Kelso Place, London, W8 5QD

Construction of single storey side infill extension; construction of single storey addition at second floor/roof level to replace the existing accessi...

Planning Permission Kensington And Chelsea
12 Oct 2026 Consultation PP/26/05535

17 Hillsleigh Road, London, W8 7LE

Erection of mansard roof extension over single-storey section of north-eastern wing, facing Campden Hill Gardens

Planning Permission Kensington And Chelsea
12 Oct 2026 Consultation LB/26/05493

31 Edwardes Square, London, W8 6HH

Installation of 1no. conservation rooflight to south-east facing roof slope of rear wing at second floor level; formation of door opening between prin...

Listed Building Consent Kensington And Chelsea
12 Oct 2026 Consultation PP/26/05492

31 Edwardes Square, London, W8 6HH

Installation of 1no. conservation rooflight to south-east facing roof slope of rear wing at second floor level; formation of door opening between prin...

Planning Permission Kensington And Chelsea
12 Oct 2026 Consultation PP/26/05377

25B Upper Cheyne Row, London, SW3 5JL

Replacement of roof structure, coverings, atelier studio windows, and rooflights

Planning Permission Kensington And Chelsea
12 Oct 2026 Consultation CL/26/00466

Flat 5, Boston House, 31 Collingham Road, London, SW5 0NS

Removal of single-glazed timber sash windows and replacement with new purpose-made timber sash windows incorporating slimline double glazing; the repl...

Certificates Lawful Proposed Use or Dev. Kensington And Chelsea
9 Oct 2026 Consultation PP/26/05442

32A & 32 Mallord Street, London, SW3 6DU

Construction of a single-storey front infill extension on the western side of the property and associated works

Planning Permission Kensington And Chelsea
9 Oct 2026 Consultation PP/26/05344

Christ Church, Victoria Road, London, W8 5RQ

External landscaping works to provide sloped access to doors, paved area with cycle parking, handrail, bin store, and widened footpath

Planning Permission Kensington And Chelsea
8 Oct 2026 Consultation PP/26/05468

26 Gloucester Road, London, SW7 4RB

Replacement of front entrance slab servicing Flat 26A and replacement of rear suspended slab and associated steps.

Planning Permission Kensington And Chelsea
8 Oct 2026 Consultation LB/26/05462

Garden Flat, 40 Holland Park, London, W11 3RP

Creation of basement under footprint of house and part of rear garden to form a lower ground level; installation of air source heat pump within new lo...

Listed Building Consent Kensington And Chelsea
8 Oct 2026 Consultation PP/26/05461

Garden Flat, 40 Holland Park, London, W11 3RP

Creation of basement under footprint of house and part of rear garden to form a lower ground level; installation of air source heat pump within new lo...

Planning Permission Kensington And Chelsea
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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 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.