Kitchen Size Guide: Key Kitchen Dimensions you need to know

The first step of planning a kitchen refurbishment is to understand your kitchen size.

This includes the floor space you’ve got to work with, the corners and angles in the room, and what you want from your dream kitchen before the exciting tasks of picking cabinet colours, worktops and appliances can begin.

The kitchen designers at Smile Kitchens have written this guide to give practical insight into kitchen dimensions and measurements, helping you make sense of the dimensions and understand how best to use the space.

The aim is to understand how the size and measures affect kitchen planning.

First, what size kitchen are you working with?

Kitchen sizes in the UK vary considerably depending on the age and type of property.

If you’re living in a new build home the average is 8 to 12 square metres, which is enough for a functional galley or L-shaped kitchen layout but leaves limited room for islands or large dining areas.

Older properties such as Victorian and Edwardian terraces often have narrower footprints, with kitchens typically ranging from 5 to 8 square metres being common, while detached and semi-detached homes built from the 1970s onwards tend to offer more generous proportions of 12 to 20 square metres. 

At the larger end, open-plan kitchen diners in modern homes or extended properties can exceed 25 square metres – especially if you’re incorporating a lounge area within this. 

Understanding where your kitchen sits within these ranges is a useful starting point, because it helps set realistic expectations about which layouts are genuinely achievable and where compromises may need to be made.

Our Kitchen Size Tips

1. Begin By Measuring Your Kitchen Space Accurately

Every great kitchen design starts with clear measurements, before you make solid decisions about where cabinets should go, which appliances you need, or the theme of your design. 

We’d suggest checking all of these dimensions:

Although some of these aspects can be adjusted (i.e the position of electrical sockets), having clarity on the total circulation space and the capacity to walk between cabinets, kitchen islands, and dining areas is a baseline requirement in kitchen design.

Not sure whether your cabinets will fit into your kitchen sizes?

Read our guide on measuring your kitchen here.

Or use our free AI kitchen design tool to understand exactly what you can fit into your kitchen.

2. Choose a Layout Based on Your Kitchen Size

There are lots of misconceptions about how kitchen designs work, and one of the biggest is assuming that every kitchen should include mandatory features. 

In the design world, the kitchens we consider most successful are those designed specifically around the available space, which may involve examining the layout and providing recommendations accordingly.

This assumes that you’re not getting a kitchen extension. 

Galley Kitchens

Narrower rooms are common in period properties and older homes. The focus is on ensuring cabinets are positioned opposite each other, maximising storage and worktop space while ensuring everything is within easy reach.

L-Shaped Kitchens

An L-shaped layout feels open, but also incorporates sufficient room for eating areas, whether dining tables, breakfast bars, or adding extra storage if homeowners already have a separate dining room.

U-Shaped Kitchens

Amazing for cooking enthusiasts, U-shaped kitchens are surrounded by worktops and appliances, with an emphasis on designing an efficient working triangle where sinks, hobs, and worktops are all equidistant from each other.

Peninsula Kitchens

Peninsulas are often a brilliant way to incorporate the benefits of an island without needing quite as much floor space, making them ideal for medium-sized kitchens and open-plan spaces.

Island Kitchen Spaces

Kitchens with sufficient space may accommodate an island, which can provide extra prep space, additional seating, and extra storage, while also serving as a natural focal point.

Related reading: Should your sink or hob go to on your Kitchen island?

How do these layouts affect the kitchen planning size? 

3. Think about ‘going up’ rather than wide

When we talk about kitchen sizes, the assumption is that this is related to square metres, but never overlook the use of vertical space. 

As just some ideas, you might make a smaller kitchen more efficient than a larger room by incorporating:

• Full height cabinetry that stretches from floor to ceiling
• Floor-to-ceiling larder units for storage of dried and tinned produce
• Integrated appliances that are concealed behind cabinet surfaces
• Wall-mounted shelving whether open or enclosed
• Deeper drawers to accommodate plates, pots and dishes
• Corner storage units that turn awkward angles into valuable space

The height of a kitchen is often ignored, but it offers a way to create much more storage without making a smaller floor plan feel overcrowded.

Related reading: How high should your kitchen wall units be?

4. Plan Your Walkways and Turning Room

Regardless of a room’s physical size, a large kitchen won’t feel spacious if numerous features and seating areas are packed together, making walkways and the space you have to turn around vital aspects of your design.

Generally, you should base these decisions on:

• Having walkways where two people can pass each other comfortably
• Installing appliances where the doors can be fully opened without blocking movement or access to other features
• Using seating areas where chairs or stools can be pulled out easily 
• Adding islands and peninsulas where this gives you more options and improves movement, rather than restricting it

Here are our key dimensions for turning spaces and walkways

Detailed design makes all the difference, ensuring layouts are planned for real life and that kitchens are comfortable and easy to use, whether you have one or two people cooking or a larger family gathering.

Related reading: how much space should you leave between a kitchen island and a unit?

5.  Make Each Zone Work Better, Not Bigger

Over-designed kitchens can seem hectically busy and disjointed, often the result of cramming too much in without leaving space that makes a larger room feel naturally inviting. 

This applies in much the same way to smaller kitchens, where installing features you don’t really need leaves minimal room to move around.

A design principle that often helps is to think of the purpose of each zone, rather than focusing on a style that leaves unused corners, with ideas like:

• Specific areas for food prep and cooking
• Clear spaces for washing up and cleaning
• Dedicated cabinets and pantry units for food storage
• Area

Taking this approach solidifies your design decisions from day one: if having an island for the sake of it would make your breakfast bar difficult to use, you’ll be able to see which options make the most sense.

Love looking at real kitchen designs similar to your own floor space to see how other homeowners have transformed their rooms? Browse our design galleries or give us a call to find a good time to chat with our design team.

6. Understand the ‘standard’ dimensions for appliances and cabinetry 

Whilst the dimensions of appliances like fridges, range cookers and hobs vary, the majority of options on the market follow industry standards to make sure they fit in the majority of households in the UK. 

Standard Kitchen Unit and Appliance Dimensions

Understanding standard unit sizes before you plan your layout means you can work out quickly what will fit, what won’t, and where compromises might need to be made.

Base Unit Standard Sizes

Kitchen Wall unit standard sizes

Tall Larder Unit sizes

Standard appliance sizes 

Frequently Asked Questions

Why Isn’t a Bigger Kitchen Always Better?

In an ideal world, we’d all have more than enough space to add every appliance or feature we could think of, but the practicalities of efficient, stylish design relate to a lot more than space alone. 

There are many considerations, but we’d emphasise that bigger isn’t always better when it comes to incredible kitchen design.

The planning and design expertise that goes into bespoke kitchens has a much greater impact than square footage, whether you’re fortunate enough to have a vast space or want to get the most from a compact room.

Small kitchens can feel charming, practical and airy with the right decisions, and even huge kitchens can appear dull, sterile and cold if the space isn’t used effectively, which is where professional, independent design expertise comes into its own.

What Makes a Kitchen Small?

This is a great question, because small kitchens aren’t necessarily those with the least floor space! Instead, they’re those where walkways are constricted, appliances can’t be fully opened, or it’s awkward to pull out a chair or stool without getting in someone else’s way.