Who can I hire (and when) for my dream kitchen extension?

Teal kitchen design

From architects and builders to kitchen designers, there is a raft of trades available for your kitchen extension, but what does each actually do, who should you enlist, and when?

As the heart of the home, it’s hardly surprising that the kitchen extension remains one of the most popular ways of improving the functionality of your property while creating additional space and increasing value.

According to recent data from kitchen retailer Wren Kitchens, 89% of property experts say a contemporary multi-functional living space – often the ambition for a kitchen extension – is so appealing to potential buyers, it can add 10-20% of a property’s value, while a new kitchen can increase its value by up to 10%. That sounds like the perfect excuse, right?

Luckily, depending on your house style, there are a number of ways you can extend, from rear and side-return to wrap-around and double-height – not to mention alternative solutions such as carving out a basement or adding on an orangery. But, which trades can help you bring your dream project to life? KBB journo Nicky Rampley-Clarke breaks down your options…

Kitchen extension with a marble clad island that features a dining table at a lower level, and a sitting area.
The roof light brings extra daylight into the kitchen. Project by Rees Architects. Photography: Chris Snook.

How can an architect help with my kitchen extension?

Usually, you might need the help of an architect early in the process to advise on what’s actually possible, guide you through the necessary permissions and work out the budget – especially if your kitchen extension involves structural or layout changes.

From your brief, they’ll come up with a proposed concept and the corresponding plans along with detailed drawings and building regulations. The latter will help you understand what permissions your extension requires – permitted development (for smaller, more common projects) or planning permission (for larger and more complex extensions), both of which your architect can manage on your behalf.

A light and bright dining area with a glass box roof in a modern design.
A light and airy kitchen design by Kitchens by Holloways, with a coffee bar and a cosy dining area.

The Royal Institute of Architects is your first port of call for sourcing an architect and offers a useful finding service that enables you to get matched with RIBA-accredited chartered practices. Alternatively, ask friends and family, who’ve gone through the process, for recommendations of tried and trusted architects.

Kate Clare, RIBA chartered architect and founder of London-based Loud Architects, explains: “An architect brings to the table designs that can save the client money, now or in the future, through spatial concepts, material choices, sustainable considerations or other creative solutions.”

Always request to see photographs of previous work or speak to former clients. Some might even offer you to go and look at a kitchen extension they’ve successfully completed, sure to give you an idea of their ability and expertise. But, depending on your budget, know there are also ways to work directly with builders, approved inspectors, and other consultants.

View of the garden through glass sliding doors.
A side extension with a Shaker-style kitchen by Oliver & Barr that shows just how much snatching a slither of space can give you.

What about a builder?

The foreman will usually be your day-to-day contact and will be responsible for bringing your vision to life while managing the process and coordinating his team and other trades (plumbers and electricians, etc.). Together, they’ll demolish any walls, make structural changes, address any challenges and construct your extension.

Blue kitchen design with a light-filled extension which houses the dining area.
The style of this kitchen extension by Mia Karlsson has been sympathetically designed to integrate with the original space.

“Builders bring a wealth of practical experience and problem-solving skills to your project. Not only do they ensure that the plans are executed correctly, but they can also offer valuable design and architectural advice based on real-world experience and expertise,” says a spokesperson at Checkatrade.com. “Builders often spot potential issues early on, suggest practical solutions and ensure the work adheres to building regulations and safety standards.”

Open-plan kitchen-diner with a window seat and a door to the garden.
This modern, spacious extension features Hardwood Oak Veneer and Hardwood Walnut Veneer fronts by Husk Kitchens.

If you decide to work with an architect, they will likely have a little black book of recommendations. However, there is an increasing number of reputable websites that enable you to source vetted trades, from Rated People to MyJobQuote.co.uk and Checkatrade. As always, get several quotes before choosing your builder, and ensure they have the correct guarantees and insurance.

By commissioning a builder early in the process, they’ll be able to review the plans from your architect to check everything is possible in terms of logistics and budget. An experienced builder will also have a few ideas of their own to throw into the mix.

Green kitchen design in an open-plan room with a central island and a dining area out of view.
Bi-fold floors flood this extension with light while a kitchen by Wren Kitchens features an island with a sit-up breakfast bar along one side to make the most of the space.

Do I need a kitchen designer?

A kitchen designer specialises in the finer details of the kitchen itself including style, layout, cabinetry, worktops, flooring and appliances. Balancing aesthetics with functionality, they help you make the most use of the space you have available and select finishes and fittings that align with your scheme and budget.

Kitchen extension housing teal cabinetry, a white island clad with marble worksurfaces and with three pendants above it.
This kitchen, from Second Nature, contrasts teal cabinetry against stark white to make the extension feel even more spacious.

Many of the big specialists and retailers offer complimentary design services, so why not make the most of it? “A designer is an essential part of a kitchen extension as they have specialist expertise to help you to achieve your dream kitchen,” says Jen Nash, head of design at Magnet Kitchens, which offers a free design consultation inclusive of a quote, 3D render and samples.

“They understand the intricacies of kitchen layouts to ensure the most efficient use of space as well as help you to create a cohesive look that matches your home’s overall aesthetic. A professional kitchen designer has the skills to blend materials, colours and styles harmoniously. Additionally, designers have in-depth knowledge of kitchen appliances, fixtures and finishes. They can guide you in choosing the right products that fit your lifestyle and budget while ensuring they are properly integrated into the design.”

Open-plan room with a kitchen with a central island painted in teal, a dining area and a sitting area near the steel-framed doors.
This Dulwich Shaker kitchen features Naked Kitchens‘ Misted Fen coloured cabinets, marble effect quartz worktops, and accents of brass.

Other trades

If your budget permits, you could benefit from a project manager to streamline the entire process, especially if you’re busy juggling work and life. A specialist design-and-build company is also a smart idea. “The usual route from concept drawings to project completion would be using an architect for the design process, then a builder for the construction, and a kitchen company to design, supply and install the kitchen itself, but this process can be difficult to manage,” says Robert Burnett, co-founder and director of Kitchens by Holloways. “A specialist design-and-build company will be able to manage the process for you to make it run smoothly and efficiently.”

View of the dining area and the garden from the kitchen island.
This beautiful kitchen by Ledbury Studio includes huge bi-fold doors along the back, which lead out into the garden.

Alternatively, an interior designer could be the right professional to bring your vision to life. They can maximise the potential of your space and suggest ways to improve it, as well as ensure your storage needs are met, pick the right furniture and furnishings,, plan your lighting scheme, and more.

A nice bonus is that they can also manage your project from start to finish and liaise with other trades, such as kitchen fitters, plumbers, flooring contractors and builders to ensure the process runs smoothly.

If you are looking for an interior designer, start with the British Institute of Interior Design (BIID). A BIID-registered designer will give you the reassurance that they have the right professional qualifications, experience and insurances.

So, do I really need all trades?

When looking to hire trades, it’s not a necessity to have all of the above – assess your own project and see what would work best for you. Talk to your friends or neighbours who did similar projects and find out how they went about it. Research local building firms or interior designers and discuss with them how their process works. You can then start to build a picture of what you can or can’t take on.

Open-plan scheme with dark cabinetry, stainless steel appliances, wood flooring and marble surfaces.
To create this kitchen, painted in Little Greene’s Obsidian Green 216, Higham Furniture worked with Trevor Brown Architects. Shaker kitchens by Higham Furniture start from £35,000. Photography: Darren Chung.

Enjoyed this post? Click here for our tips on finding tradespeople for your renovation

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