Kitchen extension in Kensington and Chelsea

Where in Kensington and Chelsea does a kitchen extension actually get determined?

Every Kensington and Chelsea postcode district we draw in, the stock that dominates it and the authority that validates a kitchen extension there. Kensington and Chelsea fees below are the statutory England rates for 2026, not kitchen extension estimates.

How does a kitchen extension differ street by street across Kensington and Chelsea?

Roof pitch, wall build-up and plot depth change every few Kensington and Chelsea streets, and each one changes what a kitchen extension can achieve at that address.

• Holland Park (W11, W14) — kitchen extension work in Holland Park means victorian and edwardian villas. Holland Park is Victorian villas around the park. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage throughout W11. RBKC Planning decides the Holland Park application, and Holland Park anchors the Holland Park location plan.
• Earl's Court (SW5) — Victorian stucco terraces, mansion blocks defines Earl's Court, where stucco terraces, edwardian mansion blocks set what a kitchen extension can do. Edwardian plots here are wider across SW5. Any Earl's Court kitchen extension is validated by RBKC Planning, with Earl's Court station the usual Earl's Court reference point on the site plan.
• South Kensington (SW7) — Victorian and Edwardian stucco terraces defines South Kensington, where stucco terraces, mansion blocks, listed buildings set what a kitchen extension can do. Ground-floor mansion-block flats can extend into a rear light well across SW7. Any South Kensington kitchen extension is validated by RBKC Planning, with V&A the usual South Kensington reference point on the site plan.
• Knightsbridge (SW1X, SW7) — a kitchen extension in Knightsbridge starts from regency and victorian terraces, mansion blocks, and Knightsbridge reads as Regency and Victorian terraces, luxury. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage in SW1X. RBKC Planning assesses Knightsbridge kitchen extensions against its own Knightsbridge character guidance, and the location plan we draw for Knightsbridge references Harrods.
• North Kensington (W10) — kitchen extension work in North Kensington means victorian terraces, post-war estates. North Kensington is Victorian terraces, post-war estates. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage throughout W10. RBKC Planning decides the North Kensington application, and Golborne Road anchors the North Kensington location plan.
• Brompton (SW3) — a kitchen extension in Brompton starts from stucco terraces, edwardian mansion blocks, and Brompton reads as Victorian stucco terraces, mansion blocks. Edwardian plots here are wider in SW3. RBKC Planning assesses Brompton kitchen extensions against its own Brompton character guidance, and the location plan we draw for Brompton references Brompton Cross.
• Kensington (W8) — a kitchen extension in Kensington starts from stucco terraces, listed buildings, and Kensington reads as Georgian and Victorian stucco terraces. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage in W8. RBKC Planning assesses Kensington kitchen extensions against its own Kensington character guidance, and the location plan we draw for Kensington references Kensington Palace.

Does Kensington and Chelsea planning policy restrict a kitchen extension?

Kensington and Chelsea conservation designations: there are 38 across RBKC Planning, Notting Hill, Holland Park, Earls Court among them. Designation costs a Kensington and Chelsea owner the permitted-development route: a kitchen extension then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Earls Court is the Kensington and Chelsea designation that most often changes a kitchen extension design.

What Article 4 removes near Kensington and Chelsea: Article 4 Directions covering HMOs, office-to-residential, and basement developments — RBKC has some of the strictest basement policies in London. Before pricing a kitchen extension we check whether the SW3 address is inside the mapped area, because RBKC Planning draws the Kensington and Chelsea boundary street by street rather than across the whole of Kensington and Chelsea.

Digging below a Kensington and Chelsea property: RBKC's basement policy (post-2015) limits to single-storey under 50% of garden area; double-storey basements effectively prohibited in residential streets. Where a kitchen extension in Kensington and Chelsea involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a Kensington and Chelsea dig within 3 m of a neighbour, and RBKC Planning expects the SW3 ground conditions addressed in the application.

Kensington and Chelsea housing stock: Grand white stucco Regency and Victorian terraces; red-brick Queen Anne mansions in Kensington; Edwardian mansion blocks; almost no post-war housing stock. Internationally wealthy residents; extensive listed building coverage; heritage and streetscape prioritised in every decision. Read that before choosing a kitchen extension route in Kensington and Chelsea — construction, not postcode, sets what is achievable.

Who decides a kitchen extension on the edge of Kensington and Chelsea?

• Westminster — the Westminster boundary runs against Kensington and Chelsea, so a kitchen extension a street from Kensington and Chelsea is decided by Westminster City Council instead. Westminster runs 56 conservation areas across SW1 and its neighbours, which is why kitchen extensions priced for Kensington and Chelsea are re-checked against Westminster policy whenever the Kensington and Chelsea address sits on that edge.
• Hammersmith and Fulham — the Hammersmith and Fulham boundary runs against Kensington and Chelsea, so a kitchen extension a street from Kensington and Chelsea is decided by Hammersmith & Fulham Council instead. Hammersmith and Fulham runs 45 conservation areas across W6 and its neighbours, which is why kitchen extensions priced for Kensington and Chelsea are re-checked against Hammersmith and Fulham policy whenever the Kensington and Chelsea address sits on that edge.
• Brent — adjoining Kensington and Chelsea, with 22 conservation areas centred on NW2. A kitchen extension on the far side of the Kensington and Chelsea line is determined by Brent Council, so the Kensington and Chelsea quote for kitchen extensions is checked against Brent guidance before it is issued.

Sources for this Kensington and Chelsea kitchen extension page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.