Planning permission in Kensington and Chelsea
Constraints: planning.data.gov.uk (ingested 2026-08-01) · Prices: HM Land Registry UK House Price Index, December 2025 · 104 sales in December 2025 · Open Government Licence
Planning in Kensington and Chelsea — the detail
The Royal Borough is one of the most planning-constrained places to build in Britain. Conservation areas blanket almost the entire borough — from the stucco terraces of The Boltons, Cheyne and Hans Town to the communal-garden squares of the Ladbroke estate and the artists' studios of Norland and Avondale in the north — and a large share of the stock is statutory-listed, so listed building consent runs alongside planning permission for even internal change across much of Chelsea, Brompton and Kensington.
Kensington and Chelsea is basement-policy territory, and its rules are among the strictest anywhere. Local Plan Policy CL7 and the 2016 Basements SPD limit excavation beneath a house or its garden to a single storey, require that no basement covers more than 50% of each garden or open part of the site (and often considerably less), and demand a structural method statement and a basement impact assessment covering hydrology and neighbouring stability. This is why basement refusals and appeals cluster in the borough.
On top of conservation-area controls, the borough carries scores of property-specific Article 4 directions removing permitted development rights, so the address-level check matters more here than almost anywhere. With values among the highest in the country, the economics support deep, high-specification schemes — but permitted development is rarely the route. Assume a full application, and budget for heritage and structural input from the outset.
Policy detail lives in the Kensington and Chelsea local plan and applications are submitted via the Kensington and Chelsea planning portal.
Conservation areas in Kensington and Chelsea
Real · planning.data.gov.ukEvery designated conservation area in Kensington and Chelsea from the official dataset — inside one, permitted development narrows and design scrutiny rises.
- Avondale
- Avondale Park Gardens
- Brompton
- Brompton Cemetery
- Chelsea
- Chelsea Estates
- Chelsea Park/Carlyle
- Cheyne
- Colville
- Cornwall
- Courtfield
- De Vere
- Earl's Court Square
- Earl's Court Village
- Edwards Square/Scarsdale & Abingdon
- Hans Town
- Holland Park
- Kensal Green Cemetery
- Kensington
- Kensington Court
- Kensington Palace
- Kensington Square
- Ladbroke
- Lexham
- Lots Village
- Nevern Square
- Norland
- Oxford Gardens
- Pembridge
- Philbeach
- Queen’s Gate
- Royal Hospital
- Sloane Square
- Sloane/Stanley
- Thames
- The Billings
- The Boltons
- The College of St Mark & St John
- Thurloe/Smith's Charity
Source: planning.data.gov.uk · Open Government Licence. Boundaries are checked at address level by the area report.
Article 4 directions in Kensington and Chelsea
Real · planning.data.gov.ukKensington and Chelsea records dozens of Article 4 directions, listed only by number in the national dataset. They remove permitted development rights on specific properties and estates across the borough, working alongside its conservation-area controls and its strict basement regime — Local Plan Policy CL7 and the 2016 Basements SPD (single storey under gardens, no more than 50% of each garden or open part of the site). Use the area report, or the council's Article 4 register, for the direction that applies at a given address.
Source: planning.data.gov.uk · Open Government Licence · 82 directions recorded. Checked at address level by the area report.
Key Kensington and Chelsea planning figures
| Conservation areas | 39 |
| Article 4 directions | 82 |
| Householder applications granted | 94.3% (541 of 574) |
| London average grant rate | 85.6% |
| Rank for lowest grant rate | 29 of 33 |
| Average house price | £1,275,007 |
| Annual price change | -4.3% |
Conservation areas and Article 4 directions: planning.data.gov.uk, ingested 2026-08-01 · Householder approval rates: MHCLG district planning application statistics (PS2), 2025 Q2 to 2026 Q1 · House prices: HM Land Registry UK House Price Index, December 2025 · Open Government Licence. Figures are as published on those dates; a designation missing from the national dataset is a gap in the dataset, not proof it does not exist.
What gets built in Kensington and Chelsea
Conservation coverage and Article 4 directions make a full householder application the default; matching stock brick and lime mortar are expected.
Rear extension in Kensington and Chelsea →Common on the borough's Victorian terraces, but conservation control on rear elevations is exacting.
Side return extension in Kensington and Chelsea →Roof-level change in the conservation areas faces intense control; mansard form and natural slate decide outcomes.
Loft conversion in Kensington and Chelsea →Policy CL7 caps excavation at a single storey and no more than 50% of each garden or open part of the site, with a basement impact assessment — among London's strictest.
Basement extension in Kensington and Chelsea →Class E rear placement can qualify for PD, but listed curtilage removes it entirely — and much of the borough is listed.
Garden room in Kensington and Chelsea →Kensington and Chelsea postcode by postcode
SW3 is the heart of old Chelsea — the Cheyne, Chelsea and Royal Hospital conservation areas run down to the river, with Hans Town …
SW3 planning report →SW7 covers the white-stucco terraces of the Brompton, Courtfield, Cornwall and Queen's Gate conservation areas and the museum quar…
SW7 planning report →W8 spans the Kensington, Kensington Palace and De Vere conservation areas and the grand villas around Holland Park. Heritage contr…
W8 planning report →W11 is the Ladbroke estate's communal-garden squares and the Norland and Pembridge conservation areas — some of London's most reco…
W11 planning report →W10 mixes the Oxford Gardens conservation area, the Kensal Green cemetery setting and Portobello's northern reach. Conservation co…
W10 planning report →SW5 is Earl's Court — mansion blocks, converted terraces and a high share of flats in Kensington and Chelsea. Conservation coverag…
SW5 planning report →SW10 covers West Brompton and the World's End area, with Kensington and Chelsea as the primary authority and a Hammersmith and Ful…
SW10 planning report →Kensington and Chelsea planning, asked straight
Do I need planning permission to build a basement in Kensington and Chelsea?
Is my Kensington and Chelsea home in a conservation area?
Will I need listed building consent in Kensington and Chelsea?
Can I extend under permitted development in Kensington and Chelsea?
How do I check Article 4 and conservation status for a K&C address?
Related reading
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Read the guide →Designated land edits the rulebook — here's the exact redline.
Read the guide →What applies at your address?
Borough-level rules only narrow it down. Enter a Kensington and Chelsea postcode for the live constraint check — conservation area, Article 4 and sold-price comparables, cited to source.
Need it in writing for one address? A planning permission report for a Kensington and Chelsea property — from £59, or surveyor-reviewed from £295.
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