Rear Dormer Loft Conversion Drawings in Kensington and Chelsea

Which Kensington and Chelsea postcodes does this rear dormer service cover?

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

Which Kensington and Chelsea neighbourhoods suit a rear dormer best?

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

• Knightsbridge (SW1X, SW7) — rear dormer work in Knightsbridge means regency and victorian terraces, mansion blocks. Knightsbridge is Regency and Victorian terraces, luxury. Full-width rear dormers on Victorian terraces here are the default throughout SW1X. RBKC Planning decides the Knightsbridge application, and Harrods anchors the Knightsbridge location plan.
• North Kensington (W10) — rear dormer work in North Kensington means victorian terraces, post-war estates. North Kensington is Victorian terraces, post-war estates. Full-width rear dormers on Victorian terraces here are the default throughout W10. RBKC Planning decides the North Kensington application, and Golborne Road anchors the North Kensington location plan.
• Brompton (SW3) — rear dormer work in Brompton means stucco terraces, edwardian mansion blocks. Brompton is Victorian stucco terraces, mansion blocks. The deeper Edwardian rear slope takes a full-width dormer without breaching the 40 m³ or 50 m³ volume limits on most of these houses throughout SW3. RBKC Planning decides the Brompton application, and Brompton Cross anchors the Brompton location plan.
• Kensington (W8) — rear dormer work in Kensington means stucco terraces, listed buildings. Kensington is Georgian and Victorian stucco terraces. Full-width rear dormers on Victorian terraces here are the default throughout W8. RBKC Planning decides the Kensington application, and Kensington Palace anchors the Kensington location plan.
• Chelsea (SW3, SW10) — Georgian and Victorian terraces, riverside defines Chelsea, where georgian and victorian terraces, listed buildings set what a rear dormer can do. A dormer on a Georgian roof has to sit behind the parapet line to stand any chance of consent across SW3. Any Chelsea rear dormer is validated by RBKC Planning, with King's Road the usual Chelsea reference point on the site plan.
• Notting Hill (W11) — a rear dormer in Notting Hill starts from victorian stucco terraces, and Notting Hill reads as stucco terraces, painted facades. Full-width rear dormers on Victorian terraces here are the default in W11. RBKC Planning assesses Notting Hill rear dormers against its own Notting Hill character guidance, and the location plan we draw for Notting Hill references Portobello Road.
• Holland Park (W11, W14) — a rear dormer in Holland Park starts from victorian and edwardian villas, and Holland Park reads as Victorian villas around the park. Full-width rear dormers on Victorian terraces here are the default in W11. RBKC Planning assesses Holland Park rear dormers against its own Holland Park character guidance, and the location plan we draw for Holland Park references Holland Park.

Does Kensington and Chelsea planning policy restrict a rear dormer?

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

Kensington and Chelsea below-ground policy: RBKC's basement policy (post-2015) limits to single-storey under 50% of garden area; double-storey basements effectively prohibited in residential streets. Any rear dormer in Kensington and Chelsea that goes below existing foundations triggers two months notice under section 6 of the Party Wall etc. Act 1996, and RBKC Planning will want the SW3 ground and groundwater position set out.

The building fabric around Kensington and Chelsea: 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. A rear dormer in Kensington and Chelsea is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to RBKC Planning.

Who decides a rear dormer on the edge of Kensington and Chelsea?

• Westminster — the Westminster boundary runs against Kensington and Chelsea, so a rear dormer 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 rear dormers 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 rear dormer 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 rear dormers priced for Kensington and Chelsea are re-checked against Hammersmith and Fulham policy whenever the Kensington and Chelsea address sits on that edge.
• Brent — cross the Kensington and Chelsea boundary and Brent Council takes the rear dormer instead, applying 22 conservation areas of its own around NW2. We re-price rear dormers at the Kensington and Chelsea edge because Brent policy and Kensington and Chelsea policy rarely align on rear dormer depth.

Sources for this Kensington and Chelsea rear dormer 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.