How much does a kitchen extension cost in the United Kingdom?

Celebrated as the heart of the home, the kitchen deservedly receives a lot of attention from seasoned renovators and new home improvers alike. But what does it take to create the perfect hot spot and what can you get for your money?

A kitchen with white splashback and cupboard

How much a kitchen extension costs to build in the UK is a tricky question to answer because they involve elements of two renovation categories — kitchen renovations and building an extension — wrapped into one. Detailing the cost of each component may get confusing and monotonous, so instead, follow along with us as we explore which factors have the biggest impact on the final cost and what can be achieved at different price points. 
Kitchen extensions are highly customisable, come in all shapes and sizes, with a range of finishings, in a variety of styles — and they all cost different amounts to build. However, what they do share, is the budget drivers behind these costs: the material selection, structural and functional requirements, joinery, and logistics. Each of these aspects heavily affects the final cost and will make the difference between a high or low-cost project.

How much does a kitchen extension cost?

A  kitchen extension in the United Kingdom will cost between £80,000 - £250,000+*
Having completed thousands of successful renovations, we’ve realised that kitchen extensions in the UK can be placed on a spectrum. In this article, we’ll take a look at the impact each budget driver has on these costs to help highlight where you may want to save or splurge.
There’s no one-size-fits-all approach to achieving your kitchen extension goals so the best way to make a plan is by working with a Refresh Renovation Consultant. They can give you an accurate quote tailored to your project. But here, we’ll explore a few real-life examples of Refresh kitchen extension projects to help put things into perspective.

Main budget drivers of a kitchen extension

  • Material selection
  • Structural and functional requirements
  • Joinery
  • Logistics

Read on to find out how much your kitchen extension may cost depending on the changes you are looking to make.

Material Selection for a kitchen extension

Lower range

Standard spec finishings and minimal tile work will keep budget blowout at bay, but the initial cost isn’t the only thing to factor in. Inexpensive materials may be cheaper at first but if they require replacing and substantial maintenance, the price tag could be much higher in the end. However, there are plenty of options available that are both affordable and durable. When it comes to cabinetry, you might be able to repurpose it. If they are solid, replacing only the doors and hardware allows for a cost-effective makeover. 
Choosing materials that are budget-friendly doesn’t mean compromising on style or quality. Check out this kitchen extension that was executed for £80,000*. (MAR 2022) The cabinetry, benchtops, and flooring are all crisp and minimal but work together cohesively, resulting in a high-end look. 

Upper range

Extensive tile installation, whether on the floor, as a splashback or design feature, is typically a component of a high-cost project, due to its labour-intensive nature and precision application. Other upmarket materials include marble countertops, anything custom such as cabinetry or lighting, and high-end appliances. 

Structural and functional requirements for a kitchen extension

Lower range

Although we’re discussing traditional kitchen extensions, you may be able to extend your kitchen by commandeering square meterage from elsewhere in your home. If you have an underutilised sunroom or overly spacious lounge, it’s feasible to undertake a kitchen extension within your home’s existing footprint. 
In terms of adding extra space, a straightforward floor plan is the way to go if you want to stick to a slim budget. Limiting the need for structural work, extensive plumbing, or invasive heating installation will help keep costs manageable. 

Upper range

Far more flexibility is afforded with a larger investment. You have the freedom to undertake significant structural changes and adopt architectural features such as exposed beams or a roof with a dramatic pitch. Functional luxuries such as a gas-powered fireplace, underfloor heating, and air purification systems can be achieved in this upper range, too.
 A cathedral ceiling adds height and grandeur to this £150,000 kitchen extension. See the full transformation here. (JUL 2020)

Joinery for a kitchen extension

Lower range

Limiting joinery altogether is the least expensive option but utilising simple joinery solutions is a great area to save money. Opting for a basic window or door frame won’t make or break an entire interior’s design, whereas custom joinery, while eye-catching, may certainly break the bank.

Upper range

Anytime you opt for custom joinery such as pocket doors, ornate woodworking, and curved doors, expect a premium price tag to follow. These details call for a high level of expertise and craftsmanship. This £130,000* kitchen extension included multiple skylights, shadowbox windows, and double french doors leading directly to the garden. (NOV 2021)

Logistics for a kitchen extension

Lower range

When a property is on a freestanding, flat plot of land, free of government regulations and limitations, building an extension is usually fairly straightforward and won’t incur extra costs. There are no additional hoops to jump through or costly excavation needed. Simple site access makes it easier for the builders to come and go on your property and shortens the timeline as well. 

Upper range

A sloping plot or a property with a compromised foundation will require extensive prep work to ensure that the area is safe for additional construction. This will incur additional costs. High-density areas also pose a problem if large machinery is required on site. Difficult access may need specialty equipment or creative solutions to get the job done. Both mean one thing: expensive.  

Thinking about embarking on your own kitchen extension journey?

Refresh’s proven 5-step method begins with a consultation and ends with a bespoke kitchen, specially tailored to your lifestyle. The steps in between include thorough planning and, before construction starts, you’ll be provided with a fixed quote for the cost of your project so you know exactly what to expect. To learn more, get in touch with a local Renovation Consultant and arrange your free, no-obligation consultation.

*Costs are shown as an indicative guide of what previous projects have cost. The costs of renovating a home rise each year as material and labour costs rise – for an estimate/quote on your specific project, please consult your local Refresh Renovations specialist to find out more about our planning, design and build process.
**All Refresh Renovations franchises are independently owned and operated.

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All Refresh Renovations franchises are independently owned and operated.

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