Kitchen Extension Ideas

A kitchen extension is where two of the biggest projects most homes ever take on meet in one go: building the space and fitting the kitchen inside it. Get the footprint, the light and the layout right and you end up with the open-plan kitchen-diner that the rest of the house ends up revolving around.

For most Aberdeen families, the kitchen has quietly become the main room of the house. It is where breakfast happens, where homework gets done at the table, where people gather when friends come round. The trouble is that a lot of older homes in the city and across the shire were built with a small, closed-off kitchen tucked at the back, cut off from the garden and from the rest of the ground floor. A kitchen extension fixes that in a single move, by adding floor area and then using it to open the whole space up.

This guide is about the ideas worth weighing before you commit: which kind of home extension suits a kitchen, how to flood the new room with daylight, and how to lay it out so cooking, eating and relaxing each get their own place without walls in between. It sits at the join between the building work and the new kitchen itself, so we will keep one eye on each.

Why extend for the kitchen specifically

You can refit a kitchen inside its existing four walls, and for plenty of homes that is exactly the right call. A new layout, better units and proper lighting can transform a room without a single brick being laid. If your frustration is purely about tired units or a dated finish, a straightforward refit is usually the smarter spend, and our guide on what a new kitchen costs in Aberdeen sets out what that involves.

An extension earns its keep when the problem is the space itself, not just the fittings. Three signs point that way:

• The footprint is simply too small. No clever layout can add metres that are not there. If you cannot fit an island, a dining table and a sensible run of worktop, you need more floor area.
• The kitchen is cut off. A galley kitchen behind a closed door, with the dining room and the garden both somewhere else, fights against how families actually live now.
• The light is poor. North-facing or hemmed in by neighbouring walls, a lot of rear kitchens are dark for most of the day. An extension is your chance to design the daylight in from scratch.

Choosing the right extension for a kitchen

The shape of your plot and your house usually narrows this down quickly. Here is how the three main options play out in practice.

Rear extension

Building straight out into the back garden is the most common choice, and for good reason. A single-storey rear extension gives you a generous rectangle of new floor that joins onto the existing kitchen, which is ideal for an open-plan kitchen-diner with room for both an island and a proper table. It is also where bifold or sliding doors come into their own, opening the whole back wall onto the garden in summer. The trade-off is garden space, so it suits homes where the rear plot has depth to spare.

Side-return extension

Many older terraced and semi-detached homes have a narrow, wasted strip of ground running along the side of the original kitchen. A side-return extension fills that strip in. The added floor area can look modest on a plan, yet the effect is dramatic, because it widens a long, thin galley kitchen into a proper room and lets you bring light in along the new side. It is often the most efficient way to gain a usable kitchen-diner without giving up much garden at all.

Wraparound extension

A wraparound combines the two, wrapping around the back and down the side in an L shape. It delivers the largest open-plan ground floor of the three and the most freedom to zone the space, but it uses the most garden and the most budget. It is the right answer where the plot is generous and the ambition is a single, large, flowing kitchen, dining and family space.

If you want to see how these sit alongside double-storey and over-structure options, our overview of the types of home extension covers the full range, and where a kitchen extension might form the ground floor of something larger, the comparison of a single versus double storey extension is worth a read.

Bringing in the light

Daylight is what separates a kitchen extension that feels special from one that merely feels bigger. A common mistake is to add depth at the back and accidentally create a gloomy middle, where the new space pulls the kitchen further from any window. Designing the light in from the start is what prevents that.

• Roof lights and roof lanterns. Glazing set into a flat or pitched extension roof pours daylight straight down into the centre of the room, exactly where rear extensions tend to go dark. A roof lantern over a dining table or an island is one of the most effective moves there is.
• Bifold and sliding doors. A glazed rear wall does double duty, flooding the room with light and connecting the kitchen to the garden. Bifolds fold right back to open the whole span, while sliders keep a slimmer frame and larger panes of glass.
• A glazed side return. Where a side-return extension meets the original wall, a run of roof glazing along that join lights up what used to be the darkest part of the old kitchen.
• Layered artificial light. For the North East's dark winter afternoons, plan task lighting over worktops, softer ambient light over the dining zone and a few accents, all on separate switches, so one room can shift from cooking to relaxing.

Layout and zoning the open-plan space

Open-plan does not mean one undivided box. The best kitchen-diners read as distinct zones for cooking, eating and relaxing, defined by the layout rather than by walls. A few ideas that consistently work:

1. Let an island do the dividing. An island is the natural boundary between the working kitchen and the living or dining side, while keeping sight lines open. It also adds the worktop and storage that the original kitchen never had.
2. Anchor the cooking zone against a wall. Keeping units, the hob and the sink along one or two walls frees the rest of the floor for the table and seating, and keeps the working triangle tight and practical.
3. Give the dining table its own spot. Position it where the light is best, often under a roof lantern or beside the garden doors, so meals feel separate from the clutter of cooking.
4. Use flooring and ceiling to signal zones. A continuous floor keeps the space feeling unified, while a change in ceiling level under a roof lantern, or a run of pendant lights, quietly marks where one zone ends and the next begins.
5. Plan a snug or soft-seating corner. Even a small sofa or a window seat at the far end turns a kitchen-diner into a genuine family room, the place everyone drifts to.

This is the point where the building work and the kitchen design have to be planned as one. The position of the island, the run of units, the sockets, the waste and the lighting all need to be settled before the shell is built, not bolted on afterwards. For inspiration on finishes and current looks, our guide to the latest kitchen design trends in Aberdeen pairs well with the layout thinking here.

Budgeting a kitchen extension

A kitchen extension is two budgets in one: the building work that creates the space, and the kitchen that goes inside it. It helps to picture them separately and then add them together.

For the build, a single-storey extension in the Aberdeen area starts from around £45,000, and as a rough working figure extensions cost in the region of £2,500 per square metre. Because a kitchen extension is shaped so much by glazing, structural openings, services and the kitchen specification, we price the kitchen extension itself per project rather than quoting a single headline number.

For the kitchen that goes inside, the fit-out is a separate line. As a guide, fitting a kitchen starts from around £3,000 for labour only, a supply and fit package starts from around £8,000, and a full refit starts from around £12,000, depending on the units, worktops and appliances you choose.

Planning permission and building warrants

Two separate approvals can apply, and it is worth keeping them apart in your mind. Planning permission is about whether you are allowed to build the extension at all. Many single-storey rear and side-return extensions in Scotland fall within permitted development, subject to limits on size, height and how close you build to a boundary, though those limits are tighter for flats, conservation areas and listed buildings. Our extension planning permission guide and our overview of permitted development versus planning permission in Scotland set out where the lines fall.

A building warrant is the separate consent that confirms the work meets the building standards, covering structure, insulation, drainage, electrics and ventilation, all of which matter in an open-plan kitchen. In Scotland a kitchen extension needs a building warrant from Aberdeen City Council or Aberdeenshire Council. You do not have to navigate either process yourself; we handle the building warrant for you and guide the planning side, which we explain further in our guide to building warrants in Scotland.

We build kitchen extensions throughout the city and the surrounding towns, so whether you are in the West End, in Westhill or further out across Aberdeenshire, the same family-run team handles the build and the kitchen from first survey to final tidy.