Start with how you live
The best kitchen extension ideas start from how the household actually uses the space, not from a picture. Do you cook together, eat every meal at the table or mostly use the kitchen as a family hub? Do children need somewhere to do homework within sight? Is the garden something you want to see from the sink? A short list of what does not work in the current layout is often the most useful brief you can give a designer.
Each idea below has consequences for structure, approvals and budget, so it is worth knowing them before you settle on a design.
Open-plan and broken-plan layouts
Knocking the old kitchen and dining room through into a new single storey extension creates one large space for cooking, eating and relaxing. It usually means removing load-bearing walls, which needs steel beams designed by a structural engineer. Fully open-plan rooms can be noisy and hard to heat, so many people now prefer broken-plan: one connected space divided into zones with a change in floor level, a half-height wall, shelving or a kitchen island that defines the cooking area.
Bringing in light from above
Extensions push the original rooms further from the windows, so the middle of the house can become dark. Rooflights and roof lanterns are the main fixes. A flat roof makes it straightforward to add a lantern over a dining table or a row of rooflights along the back of the old house. A pitched roof with rooflights gives a vaulted ceiling with a sense of height. Our flat roof extensions guide covers the roof options in more detail.
Glazing and the link to the garden
Wide sliding or bifold doors are popular for good reason, but they are not the only option. A corner of glazing, a low window seat or a long picture window above the worktop can frame the garden while leaving more wall for cupboards. Large openings need structural support above them and must meet Building Regulations for heat loss, which can affect how much glazing you can have without improving insulation elsewhere.
Think about the patio at the same time. A level threshold and a patio laid to fall away from the doors make the kitchen and garden feel like one space in summer.
Side returns, wrap-arounds and making use of every metre
On many terraced and semi-detached houses, the narrow side return is wasted space. Filling it can make a galley kitchen wide enough for an island. A wrap-around extension combines a side return and a rear extension in an L-shape and gives the most space, with more complex steelwork and roofing. Our side-return and wrap-around extension guides explain each approach.
Storage, utility and practical space
A bigger kitchen quickly fills with appliances. Including a separate utility room or a boot room by the back door keeps washing machines, coats and muddy shoes out of the main space. A walk-in pantry or a run of tall units along one wall gives more storage than a full set of wall cupboards. Plan sockets, lighting circuits and the position of the sink and hob early, because moving drainage and gas later is costly.
Other single storey extension ideas
Not every extension is a kitchen. A single storey extension can create a ground-floor bedroom and shower room for an older relative, a home office away from the family space, a playroom, or a garden room joined to the house. The build is similar; what changes is the layout, glazing and services.
Turning ideas into a design
Once you know what you want, an architect or designer turns it into drawings for planning or permitted development and Building Regulations. We work from your architect's drawings and can recommend a trusted architect if you do not have one. Our house extensions page explains how we build, and our extension cost guide covers the factors behind the price.
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Questions people ask
What are good kitchen extension ideas for a small house?
Filling a side return, using broken-plan zones, adding rooflights for light and a utility room for appliances all make a modest extension feel larger.
Do kitchen extension ideas affect the cost?
Yes. Removing load-bearing walls, wide glazing, roof lanterns and moving plumbing or gas all add to the build. Simple shapes and fewer structural openings cost less.
How long does a single storey kitchen extension take to build?
It depends on size, foundations, the roof, glazing lead times and the fit-out. We give a realistic timescale with the free estimate.
Do I need planning permission for a kitchen extension?
Many single storey rear extensions can be built under permitted development within set limits, but some need planning permission. All need Building Regulations approval.