House extensions in Kensington and Chelsea

Kensington and Chelsea received 1,606 householder applications in the last 12 months - about 31 a week. Rear extensions and dormers are the most common. Of the 1,138 decided so far, 1,091 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 463 applications
2 days ago Consultation LB/26/04657

Fourth And Fifth Floor Flat, 50 Cadogan Square, London, SW1X 0JW

A fifth-floor rear extension including aluminium framed double glazed sliding doors with concealed external shutters; installation of air source heat ...

Kensington And Chelsea
2 days ago Consultation PP/26/04433

44 Pembridge Villas, London, W11 3EG

Construction of side dormer roof extension within the main roof slope to match neighbouring examples

Kensington And Chelsea
2 days ago Consultation LB/26/04773

St James's Lodge, St James's Gardens, London, W11 4RB

Minor works and variations from previously approved plans including retention of internal alterations and change to design of side window of garage/st...

Kensington And Chelsea
2 days ago Consultation PP/26/04656

Fourth And Fifth Floor Flat, 50 Cadogan Square, London, SW1X 0JW

A fifth-floor rear extension including aluminium framed double glazed sliding doors with concealed external shutters; installation of air source heat ...

Kensington And Chelsea
8 Sept 2026 Consultation LB/26/04857

42 Ovington Square, London, SW3 1LR

Urgent fabric protection works to address water ingress and associated decay, including targeted repairs to roof coverings, waterproofing, upstands, f...

Kensington And Chelsea
8 Sept 2026 Consultation LB/26/04597

Flat G, 4 Chelsea Embankment, London, SW3 4LF

Internal remodelling and modernisation of 4th floor apartment, including refurbishment works, electrical rewiring, heating and cooling systems, and al...

Kensington And Chelsea
8 Sept 2026 Consultation PP/26/04799

53 and 55 Campden Hill Road, London, W8 7DY

Formation of an opening through the front garden wall between 53 and 55 Campden Hill Road,and formation of steps to allow access between the front gar...

Kensington And Chelsea
8 Sept 2026 Consultation PP/26/04730

31 Burnsall Street, London, SW3 3SR

Excavation of a single-storey basement with associated front and rear lightwells; erection of ground and second floor rear extensions; replacement of ...

Kensington And Chelsea
8 Sept 2026 Consultation PP/26/04596

Flat G, 4 Chelsea Embankment, London, SW3 4LF

Internal remodelling and modernisation of 4th floor apartment, including refurbishment works, electrical rewiring, heating and cooling systems, and al...

Kensington And Chelsea
8 Sept 2026 Consultation PC/26/04840

80 Oxford Gardens, London, W10 5UW

Permission sought for a pavement crossover and general arrangement.

Kensington And Chelsea
8 Sept 2026 Consultation PP/26/04783

127 Abbotsbury Road, London, W14 8EP

Extending existing basement to front of the dwelling

Kensington And Chelsea
8 Sept 2026 Consultation LB/26/04694

40 Carlyle Square, London, SW3 6HA

Internal reconfiguration of existing basement accommodation to provide dedicated home gym, through reorganisation of existing cinema room and adjoinin...

Kensington And Chelsea
8 Sept 2026 Consultation PP/26/04752

12-14 Pottery Lane, London, W11 4LZ

Erection of metal railings boundary treatment to existing roof terrace

Kensington And Chelsea
7 Sept 2026 Consultation CL/26/04708

Flat 1, Durham House, Durham Place, London, SW3 4ET

Proposed enlargement of window to create doorway opening onto rear courtyard of property. Installation of associated landing, stair and balustrade to ...

Kensington And Chelsea
7 Sept 2026 Consultation LB/26/04821

123 Sloane Street, London, SW1X 9BW

Internal alterations at third floor, comprising removal of existing suspended plasterboard ceiling and supporting secondary timber joists to expose ex...

Kensington And Chelsea
7 Sept 2026 Consultation PP/26/04803

Queripel House, 1 Duke Of York Square, London, SW3 4LY

Refurbishment, remodelling and extension of Queripel House, comprising extensions to rear and at second floor level, a redesigned roof profile to acco...

Kensington And Chelsea
7 Sept 2026 Consultation PP/26/04665

5 Upper Phillimore Gardens, London, W8 7HF

Extension of the side return extension (adjoining the boundary wall with No. 7 Upper Phillimore Gardens) towards the principal front elevation

Kensington And Chelsea
7 Sept 2026 Consultation PP/26/04579

4 Rawlings Street, London, SW3 2LS

Extensions and alterations at basement, ground floor and loft levels

Kensington And Chelsea
7 Sept 2026 Consultation PP/26/01625

Flat 3, 8 Melbury Road, London, W14 8LR

Construction of single storey, detached garden pavilion within curtilage of building, for use as a studio for production of art.

Kensington And Chelsea
7 Sept 2026 Consultation PP/26/04715

22 Cheyne Row, London, SW3 5HL

Landscaping works to rear garden comprising the removal of mosaic tiles and their replacement with yorkstone slabs and timber decking. Alterations to ...

Kensington And Chelsea
7 Sept 2026 Consultation PP/26/04646

22 Victoria Road, London, W8 5RG

Alterations to existing rear extension, including replacement of existing glazed roof with new flat roof finished in lead and incorporatin proposed ro...

Kensington And Chelsea
7 Sept 2026 Consultation LB/26/04716

22 Cheyne Row, London, SW3 5HL

Landscaping works to rear garden comprising the removal of mosaic tiles and their replacement with yorkstone slabs and timber decking. Alterations to ...

Kensington And Chelsea
7 Sept 2026 Consultation PP/26/04723

50 Peel Street, London, W8 7PD

Construction of ground floor side extension

Kensington And Chelsea
7 Sept 2026 Consultation LB/26/01626

Flat 3, 8 Melbury Road, London, W14 8LR

Construction of single storey, detached garden pavilion within curtilage of building, for use as a studio for production of art

Kensington And Chelsea
7 Sept 2026 Consultation PP/26/04794

22 Holland Villas Road, London, W14 8DH

Raise ridge of main roof and insert dormer windows on front and rear elevations. Erect single-storey rear extension at lower ground floor level, and e...

Kensington And Chelsea
4 Sept 2026 Consultation PP/26/04761

43 Oakley Street, London, SW3 5HA

Refurbishment & part replacement of existing outbuilding, retaining existing footprint and associated alterations.

Kensington And Chelsea
4 Sept 2026 Consultation PP/26/04778

3-5 Ives Street, London, SW3 2ND

Adoption of flat roof as external amenity space by installation of 1.8m high opaque glazed enclosure and lightweight timber decking.

Kensington And Chelsea
4 Sept 2026 Consultation PP/26/04509

Flat A, 69 Oxford Gardens, London, W10 5UJ

Installation of single-storey garden room(3.2m x 2.5m) with timber and cement-board cladding, aluminium-framed glazed doors and window, and a sedum li...

Kensington And Chelsea
4 Sept 2026 Consultation PP/26/03600

122 Old Brompton Road, London, SW7 3RA

Alteration to front boundary wall, increasing height of wall; extended using brickwork selected to match wall in colour, texture, bond and mortar; ex...

Kensington And Chelsea
3 Sept 2026 Consultation LB/26/04674

26 Cadogan Place & 6 Cadogan Lane, London, SW1X

DOCUMENTS AND DRAWINGS ARE NOT AVAILABLE ELECTRONICALLY FOR THIS APPLICATION. PLEASE CALL THE CASE OFFICER. Roof repairs and renovation works, includi...

Kensington And Chelsea
3 Sept 2026 Consultation LB/26/04809

Ground Floor Flat, 62 Cadogan Square, London, SW1X 0EA

Replacement of modern patio with decking and like for like replacement boundary treatment (part retrospective application)

Kensington And Chelsea
3 Sept 2026 Consultation PP/26/04672

5 Seymour Walk, London, SW10 9NE

Demolition and replacement of rear kitchen extension with replacement roof terrace above, reinstatement of rear elevation of Regency house, removal an...

Kensington And Chelsea
3 Sept 2026 Consultation PP/26/04673

26 Cadogan Place & 6 Cadogan Lane, London, SW1X

DOCUMENTS AND DRAWINGS ARE NOT AVAILABLE ELECTRONICALLY FOR THIS APPLICATION. PLEASE CALL THE CASE OFFICER. Roof repairs and renovation works, includi...

Kensington And Chelsea
3 Sept 2026 Consultation PP/26/04808

Ground Floor Flat, 62 Cadogan Square, London, SW1X 0EA

Replacement of modern patio with decking and like for like replacement boundary treatment (part retrospective application)

Kensington And Chelsea
2 Sept 2026 Consultation LB/26/04408

Flat 3, 61 Holland Park, London, W11 3SJ

Internal alterations to Flat 3, 2nd floor including: reconfiguration of layout, removal and construction of new internal partitions, formation and alt...

Kensington And Chelsea
2 Sept 2026 Consultation PP/26/04438

83 Addison Road, London, W14 8ED

Erection of a side extension expanding the raised ground floor accommodation within the pitched roof of the existing lower ground floor garage

Kensington And Chelsea
2 Sept 2026 Consultation CL/26/04647

22 Victoria Road, London, W8 5RG

Proposed single-storey ancillary timber pergola and associated garden storage unit - shed to rear of garden. (Certificate of Lawful Proposed Use or De...

Kensington And Chelsea
1 Sept 2026 Consultation PP/26/04720

265 Ladbroke Grove, London, W10 6HF

Wholesale replacement of windows and rear door: all windows are to be replaced with slimline heritage-style timber double-glazed units, to match exist...

Kensington And Chelsea
1 Sept 2026 Consultation PP/26/04714

6 Inkerman Terrace, Allen Street, London, W8 6QX

Erection of rear and side extensions at lower ground, ground, first and second floor levels. Replacement of windows with double glazed units to front ...

Kensington And Chelsea
1 Sept 2026 Consultation PP/26/04721

Ground Floor Flat, 63 Barlby Road, London, W10 6AW

Erection of side extension with 2no. roof lights and a rear extension with green planted roof and 1no.roof light; demolition and rebuilding of outbuil...

Kensington And Chelsea
1 Sept 2026 Consultation PP/26/04460

16 St Charles Square, London, W10 6EE

Replacement of timber sliding sash windows and external entrance doors with double glazed timber windows and doors, to match existing fenestration / d...

Kensington And Chelsea
1 Sept 2026 Consultation PP/26/00063

Flat 3, Cheyne House, 18 Chelsea Embankment, London, SW3 4LA

Alterations to basement lightwell

Kensington And Chelsea
1 Sept 2026 Consultation PP/26/04640

5 Eagle Place, London, SW7 3RG

Retention of timber pergola on roof terrace (Retrospective application)

Kensington And Chelsea
1 Sept 2026 Consultation LB/26/00064

Flat 3, Cheyne House, 18 Chelsea Embankment, London, SW3 4LA

Alterations to basement lightwell

Kensington And Chelsea
31 Aug 2026 Consultation PP/26/04713

137 Elgin Crescent, London, W11 2JH

Alterations to window apertures to extended front vault and front and rear elevations. Alterations to butterfly roof shape with an additional roofligh...

Kensington And Chelsea
28 Aug 2026 Consultation PP/26/04687

Second/third Floor Flat, 6 Wetherby Gardens, London, SW5 0JN

Replacement of windows with slimline double glazed timber sash units to match existing. Addition of 1no. dormer at third floor front. Proposed roof al...

Kensington And Chelsea
28 Aug 2026 Consultation LB/26/04690

Flat 2, 61 Holland Park, London, W11 3SJ

Replacement of existing single glazed timber sashes with new slim line double glazed sashes to front and rear bay, detailed to match existing, and rep...

Kensington And Chelsea
28 Aug 2026 Consultation PP/26/04692

62 Bedford Gardens, London, W8 7EH

Installation of heat pump within acoustic enclosure to side of property, alterations to reduce size of existing window on side elevation, installation...

Kensington And Chelsea
28 Aug 2026 Consultation PP/26/01885

7 Barlby Gardens, London, W10 5LW

Replacement of existing windows, front entrance, rear doors and sidelights; and renewal of chimney breast to match existing feature (Retrospective App...

Kensington And Chelsea
27 Aug 2026 Consultation PP/26/04591

42-60 Kensington High Street, London, W8 4PP

Installation of new security railings and exit gate to fire exit lobby adjacent to Old Court Place

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.