Last Updated on March 7, 2021

Kitchen Extension Cost – How Much Is It? UK Price Breakdown

Zac Houghton

Zac Houghton

Construction expert and founder of Loftera.

Did you know that extending your kitchen can increase your property by up to 11%?

If you didn’t already know that, we’re sure that has come as a welcome surprise – you have searched for kitchen extension costs after all.

So, if you were wondering if it is a project worth embarking on, we have answered that question in one sentence – yes, it is!

Of course, the main question still needs answering, and that is “how much does a kitchen extension cost?”. There are a multitude of factors that can impact the cost of your kitchen extension, such as size, layout, design, location and many more. More of that shortly.

To answer the question to the point, the average UK kitchen extension costs £30,000. If you’re planning a smaller and more modest extension, you may be looking at closer to £10,000, whereas a larger project can cost closer to £100,000. That’s quite a range, so allow us to further break down the potential costs and discuss how certain factors can have a big say on your kitchen extension costs.

kitchen extension cost

Table of Contents

Kitchen Extension Cost: A Breakdown

The easiest way to work out the basic outlay is to measure out your new kitchen extension by m2. On average, you can expect to pay between £1,500 and £2,500 per m2.

No matter the size of your kitchen extension, your cost breakdown shouldn’t deviate too much from a breakdown of 50% for the materials, 45% for the labour itself and 5% to remove waste built up on the job itself.

Let’s put that into a chart based on varying final prices, and see how much each aspect will cost you.

Cost of Extension

Cost of Materials (50%)

Cost of Labour (45%)

Waste Removal (5%)


























On average, a labourer will charge between £125 and £200 per day, while others will charge a set fee based on the project itself. This is something that you should absolutely discuss with the professionals beforehand to avoid any unwanted surprises further down the line.

Factors Impacting Your Overall Kitchen Extension Price

There’s no denying it, extending your kitchen is a serious project, but when done right, the rewards can be stunning.

Before committing to a kitchen extension, take a read of the factors that can impact the price, and then perhaps further think over the areas where you can make savings.


Extending your home is a mammoth project, but it can actually be completed without planning permission. If your extension doesn’t extend beyond three metres out of the rear of your house, then planning permission won’t be required.

You are always best to check with the professionals before starting, to know exactly where you stand. A planning application will cost around £200, so it’s a nice little saver if you aren’t required to obtain one.


So you’ve ascertained whether you require planning permission or not, now it’s time to take a look at the design of your extension. The plans themselves, surveys, constructions designs and structural engineering.

Essential Fittings

Any kitchen extension will require certain essentials for it to serve its purpose. It goes without saying that you’ll need electrics and plumbing sorted, which will cost anything between £2,000 and £4,000.

You’ll need heating, which can also cost up to £2,000. Nobody wants to cook in a cold kitchen though, especially given that all the best parties take place here. Your walls will need plastering, and the roof attended to. Finally, the brickwork and foundations are what make the exterior and design the look and feel the way you want it. These essentials aren’t cheap, but they’re most certainly worth every penny once completed.


Now that all the foundations have been sorted and the major building work has completed, job done, right? Wrong. You need to decorate your kitchen. You’ll spend a lot of time in this new extension, so you want it to look just the way you like. Will you be painting your walls or going with wallpaper? As for the flooring, laminate is the cheapest option, with tiling and hardwood flooring also a popular choice. Concrete flooring is the most expensive option of all, but can look exquisite when done right.

Kitchen Appliances

Any kitchen worth its salt (pun intended) has plenty of appliances fitted to make it fit for purpose. Take a read of our new kitchen cost post to further familiarise yourself with what you’ll need to have installed. After that, carry on reading below, we list everything you could possibly need in your kitchen extension.

Washing Machine

Whether you opt for a freestanding washing machine or an integrated appliance will impact the costs here. Integrals are becoming increasingly popular, possibly due to their price range coming in at between £400 and £800, while stand alone alternatives can cost as much as £2,500.


It’s hotting up in here. As it should, this is a kitchen after all. The very reason for extending your kitchen is to improve your cooking experience. An oven is an integral part of this, with single or double appliances available. Electric ovens tend to cost anywhere between £150 and £1,750. Where on that scale your oven falls will depend on the quality of the appliance. Double ovens can increase in cost up to £2,000, but really do increase the practicality.

Gas ovens are considerably cheaper, and are just as reliable.


Fancy yourself as a bit of a chef? Then you’re going to need some fancy hobs to compliment you along the way. Solid plate, has, ceramic and induction hobs are the four main options available to you, with the latter becoming increasingly popular in recent years. Induction is the most expensive, ranging between £150 and £2,500, while gas hobs can be acquired for as little as £70.


Fancy the above two all in one? Then a cooker is the option for you. Cookers come with an oven, hob and even a grill installed. They are extremely practical, and can be installed for less than £200. On the contrary, top end cookers can cost in excess of £1,000.


You aren’t going to want to wash your dirty clothes in the sink of your brand-new kitchen extension, so will absolutely need a dishwasher installed. Available from between £200 and £1,200, the quality of the appliance will dictate how much you pay. Think of it as an investment, as you will certainly get a lot of use out of your dishwasher.

Fridge Freezer

Once again, integrated or freestanding? The choice is yours. Available from between £150 and £2,000 all fridge freezers do the same job, and that is keep your food fresh. The more expensive designs tend to come fitted with ice dispensers, Bluetooth and other fancy additions. It’s up to you to decide whether these are important to you.

Your Kitchen Worktop Options

We’ve discussed your kitchen appliances, but the area that takes up a vast amount of your new kitchen are the worktops.

Whether you are opting for a standard design with the worktops against the wall, or the increasingly popular islands, you’ll need to choose your worktops.


The cheapest, and therefore most popular choice is laminate worktops. Coming in at between £20 and £40 per m2, they are easy to maintain and clean. Extremely resilient to scratches, laminate worktops are up there with the most practical around. In our opinion, the beauty of laminate worktops is their flexibility in design. You can ask for your laminate to look pretty much however you like. It is this that makes them so popular with homeowners.


There is no denying that marble looks stunning when used as a kitchen worktop, but it comes at a premium price. In fact, you can expect to pay in excess of £300 per m2 for a marble worktop.

While it does look beautiful, marble is a little more susceptible to scratches and stains.


Wood surfaces aren’t as easy to maintain, as you’ll have to treat them with oil every six months. The beauty with wood worktops is that they look better with age, and really lend themselves to your kitchen. Expect to pay double what you would for a laminate worktop.


Given that granite is completely natural, they can come in a variety of designs and colours. Near enough impossible to scratch or scorch, granite may be the option for the clumsy cooks out there.

Heating Your New Kitchen

Nobody wants a cold kitchen, that’s what your fridge freezer is there for. You’ll need to consider heating options in order to cope in the colder months.

There are many different boiler systems available to you. Take a look at our recent article on types of boiler systems to help you make an informed decision.

Light Fittings

We would always advise to fit plenty of windows in your new kitchen, as natural sunlight is the best and cheapest option.

Naturally, you will need light fittings for when it goes dark, you don’t want to be chopping off any fingers, after all!

An increasingly popular lighting option is to have LED lights installed in the ceiling itself. They make your room look bigger, and the simplistic look is very much in fashion right now.

Pendant lighting, spotlights and mounted lights are all options too. Our advice would be to speak with an electrician beforehand, as many will be able to incorporate your lighting into your units themselves.

Planning Permission and Regulations

As discussed previously, you may be able to crack on with your kitchen extension without applying for planning permission. Keep in mind that you are not to cover more than half of the land around the property itself. It is much easier to speak with a professional first, they’re best placed to advise on your options.

Benefits of Extending Your Kitchen

Hopefully, if you are reading this blog, you have already thought about the benefits of extending your kitchen. In any case, allow us to make them clear.

Adds Value to Your Home

If you think you may be moving out of your home in the future, an extension adds value to your home without question. Remember the 11% increase?

Saves Hassle of Moving

Of course, the very reason why you may be extending your home is to avoid the hassle of moving at all. An extension is a much more affordable option as opposed to moving home entirely. If you love the area that you live in, this is the ideal solution to wanting more space.


Most kitchen extensions allow for more space, so that you can further utilise other rooms in your home. For instance, if you bring your dining table into your newly extended kitchen, you have an array of space to use in your dining room. The practical benefits can be huge.


We’re all vain in one way or another. Kitchens are a great way to add a little bit of class to your home. Islands, as we mentioned earlier, make for a sociable environment, while extra storage space means that those pots and pans can be tucked away out of sight.

How Long Will My Kitchen Extension Take?

The answer to this question is very much dependent on the size of the extension in question. On average, you can expect to allow for between eight and 12 weeks for your kitchen extension to be completed.

Some people choose to move out of their home for a period of time in order for the works to be completed with minimal fuss. If you have relatives nearby, that could be a perfect solution for you.

Hopefully, after reading our blog, you are much better placed to make informed decisions on your new kitchen extension. There’s a lot to consider, we know, so why not take a read of our blog explaining how to finance an extension.

Happy cooking!


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