A good kitchen layout starts with how you move between the hob, the sink and the fridge, then fits a layout shape (galley, L-shape, U-shape or island) to the room you actually have. Designers often use the "work triangle" and a set of minimum clearances as a sense check, so the room is easy to cook in and easy to walk through.
Cabinets and worktops get most of the attention, but the layout decides whether a kitchen is pleasant to use every day. This guide explains the ideas designers use, in plain English, so you can sketch a plan before you speak to a kitchen company or fitter.
What is the kitchen work triangle?
The work triangle is an imaginary line joining the three busiest points in a kitchen: the cooking area (hob or cooker), the cleaning and prep area (sink) and cold storage (fridge). The idea is simple. If those three points are too far apart, you walk too much. If they are crammed together, you have no room to work and people get in each other's way.
The US-based National Kitchen & Bath Association (NKBA) publishes widely used planning guidelines. Its kitchen planning guidance suggests:
- The three sides of the triangle together should add up to no more than about 26 feet (7.9 m).
- Each side should be no shorter than 4 feet (1.2 m) and no longer than 9 feet (2.7 m).
- Distances are measured from the centre front of each appliance or sink.
- A side of the triangle should not cut through an island or peninsula by more than 12 inches (about 30 cm).
- Major traffic routes through the room should not cross the triangle.
These are design guidelines, not UK law. They are a useful starting point, but treat them as a sense check rather than a rule you must follow to the centimetre.
Is the work triangle still relevant?
Yes, but kitchens have changed. Many homes now have a second sink, a separate oven tower, an integrated wine fridge or a coffee station, and several people often cook at once. Newer thinking, including the NKBA's own updated guidelines, talks more about zones or "centres": a prep zone, a cooking zone, a cleaning zone and a storage zone, each with the worktop space and storage it needs.
The two ideas work well together. Use the triangle for the hob, sink and fridge, then think in zones for everything else: pans near the hob, plates near the dishwasher, food near the fridge and prep area.
Which kitchen layout suits your room?
Most kitchens are a variation on four basic shapes. The right one depends far more on the size and shape of your room, where the doors and windows are, and how many people use the space than on fashion.
| Layout | Best for | Strengths | Watch out for |
|---|---|---|---|
| Galley | Narrow rooms, flats and terraced houses | Short walking distances; efficient for one cook; makes good use of a tight footprint | Can feel cramped with two people; a door at each end can turn it into a corridor |
| L-shape | Small to medium rooms and open-plan spaces | Leaves floor space free for a table; keeps traffic outside the work area; flexible | The corner cupboard can waste space without good corner storage; long runs can stretch the triangle |
| U-shape | Medium to large, roughly square rooms | Lots of worktop and storage; easy to form a tight, efficient triangle | Two corners to deal with; can feel enclosed; the gap between the runs must be wide enough |
| Island (with L or U) | Larger kitchens and kitchen-diners | Extra worktop, storage and seating; a social focal point; good for two cooks | Needs generous space on every side; plumbing or power to an island adds cost and complexity |
| Peninsula | Rooms too small for a full island | Island-style worktop and seating attached to one run; defines a kitchen-diner | Can create a bottleneck at the open end if the walkway is tight |
How much space do you need between units?
Clearances are where many home-drawn plans go wrong, especially with islands. The NKBA kitchen planning guidelines suggest these minimums:
- Walkways (a route through the kitchen that is not a work area): at least 36 inches (914 mm).
- Work aisles for one cook (the space between facing worktops, tall units or appliances): at least 42 inches (1,067 mm).
- Work aisles for more than one cook: at least 48 inches (1,219 mm).
- Seating where people pass behind diners: at least 36 inches (914 mm) for someone to edge past, or 44 inches (1,118 mm) for someone to walk past comfortably.
- Wheelchair users: allow at least 60 inches (1,524 mm) behind seated diners for a wheelchair to pass.
Remember to check the space when doors are open. A dishwasher, oven or fridge door dropped open into a narrow aisle can block the route entirely.
How do you plan a kitchen layout step by step?
- Measure the room accurately. Record wall lengths, ceiling height, and the position and size of every door, window, radiator, boiler, soil pipe and gas or water supply.
- Note what you cannot easily move. Moving a sink away from the existing waste, or a hob away from a gas supply or extraction route, is possible but adds cost.
- List how you use the kitchen. How many cooks? Do you need a dining table, a breakfast bar or space for children to do homework? Do you batch cook or mostly reheat?
- Choose a shape that fits the room using the table above, then place the sink, hob and fridge to form a sensible triangle.
- Plan the zones. Give yourself a clear stretch of worktop between the sink and the hob for preparation, and somewhere to put things down next to the fridge and oven.
- Check every clearance with doors and drawers open.
- Plan lighting, sockets and extraction alongside the layout, not after it.
- Mark it out on the floor with masking tape or cardboard boxes and walk through a typical meal before you commit.
Do you need permission or a qualified installer?
Some of the work that comes with a new kitchen is controlled by building regulations. GOV.UK says building regulations approval is needed for work such as replacing a fuse box and connected electrics, and installing or replacing a heating system, though you do not need to apply yourself if you use a tradesperson registered with a competent person scheme. Kitchen extraction is covered by the ventilation rules in Approved Document F.
Gas is stricter still. The Health and Safety Executive (HSE) states that it is illegal for anyone to carry out gas work unless they are on the Gas Safe Register or working under appropriate supervision. If your new layout moves a gas hob or cooker, use a Gas Safe registered engineer and check their ID card.
Frequently asked questions
What is the most efficient kitchen layout?
There is no single best layout. A galley is very efficient for one cook in a narrow room, while a U-shape gives the most worktop and a tight work triangle in a squarer room. The most efficient layout is the one that suits your room and keeps the hob, sink and fridge within a comfortable distance of each other.
How much space do you need for a kitchen island?
Allow for the island itself plus clear space on every working side. NKBA guidelines suggest at least 42 inches (1,067 mm) of aisle for one cook and 48 inches (1,219 mm) where more than one person cooks, and more behind any seating if people need to walk past.
Should the sink go under the window?
It is a popular choice because it gives natural light and a view while washing up, and the waste often already exits on that wall. It is not essential, though. Put the sink where it forms a sensible triangle with the hob and fridge and has worktop space on both sides.
Sources
- NKBA: Kitchen and Bath Planning Guidelines
- NKBA: Kitchen Planning Guidelines with Access Standards (PDF)
- GOV.UK: Building regulations approval
- GOV.UK: Ventilation, Approved Document F
- HSE: Domestic gas frequently asked questions
General information only. Measurements are design guidelines rather than legal requirements, and every room is different. Check your plans with a qualified kitchen designer, your local building control body and registered tradespeople before you start work.