A rear extension in Notting Hill usually starts with the original rear building line and the depth of garden behind it. The council looks closely at how far a proposal projects beyond that line and how much of the garden would be built on, because both affect the openness of the block and the amenity of neighbouring houses. On the area's terraces, gardens are often shallower than they appear once the original closet-wing or outrigger is accounted for. We measure the real available depth first, then test how much single-storey projection the plot can sensibly carry before the design is fixed.
Whether an extension can rise above single storey is one of the first questions we resolve. A single-storey rear addition is generally easier to accommodate; a double-storey or full-height rear extension has to be tested much more carefully against neighbouring windows, daylight and outlook. We assess likely daylight and right-to-light effects early, since a design that overshadows an adjoining kitchen or blocks a key window is likely to draw objections. Getting the height, roof pitch and set-back right at concept stage is usually what keeps a two-storey rear extension credible in a closely-built terrace.
Side extensions and side-return infills suit Notting Hill's end-of-terrace, corner and wider-plot houses. A side-return infill captures the narrow strip beside the original rear wing, squaring off a kitchen without extending far into the garden — often the most efficient way to add ground-floor space on a constrained plot. On corner and end-of-terrace houses, a side addition has to respect the return elevation the street sees, so its width, height and roof form are handled as carefully as a front alteration. We check whether the side flank is visible in public views before settling the massing.
Roof form and materials carry a rear or side extension in a conservation setting. A flat roof, a shallow mono-pitch, a glazed link or a pitched roof each read very differently against a period house, and the right choice depends on the host building and what neighbours will see. On stucco terraces, render profiles, parapet and cornice lines and window proportions should follow the original; on brick houses, brick type, bond and mortar colour need to match. We specify these details on the drawings rather than leaving them to site, because they are frequently what an officer scrutinises most.
Many Notting Hill houses back onto private communal garden squares, and that shared setting changes how a rear extension is judged. The rear elevation is effectively a public face onto the garden, so glazing, materials and the proportion of garden retained matter more than on an enclosed private plot. Garden-committee or freeholder approval may be needed alongside planning, and the two do not always ask for the same thing. Where a house opens onto a communal garden, we design the rear elevation as a considered composition and confirm the committee's expectations early so the consent tracks stay aligned.
We begin a Notting Hill extension with a measured survey and an honest read of the constraints — building line, garden depth, neighbouring windows, conservation status and any listing — before committing to a design. From there we prepare the householder planning drawings and, where the scheme proceeds, the building regulations package and party wall information the terrace usually requires. We coordinate structural input for wider openings and, where a lower-ground element is involved, the specialist reports RBKC expects. Throughout, we design to give the proposal the best prospect of consent while being clear that no permission can be promised.
