You want to land on an extension size that is just large enough to meet your internal needs. Going beyond this would be a waste of money. ‘You will discover the right size by playing around with a few plans and layouts to see how best you can organise the internal space’, says George Omalianakis, Residential Architect ARB / RIBA, GOAStudio. ‘The extension should do the bare minimum to allow sufficient circulation and meet your needs.’

IDEAL HOME - By Katie Simms, December 2022

Kitchen extension cost - what to budget for a new and large room, Thinking of upgrading your kitchen? Here's how much it will cost, according to the experts

Ideal Home – Click below to read all our expert advice for your kitchen extension project.

Kitchen extension cost – what to budget for a new and large room

Thinking of upgrading your kitchen? Here’s how much it will cost, according to the experts.

Article by Katie Sims, published on 4 December 2022.

“If you and the family have outgrown your current kitchen and are currently dreaming wistfully of extending, there’s probably one thing making you hesitate: the kitchen extension cost.

Kitchens have long since surpassed serving a single function of cooking and eating; they can now also be a place to do school or office work, household chores like the laundry, as well as a socialising space for guests and residents alike. Enter kitchen extension ideas to save the day, and expand the kitchen so that it can serve the growing needs of the house.

But there’s no denying that extending a kitchen is expensive, and it’s important you take the time to understand by exactly how much. There’s a lot of factors that will affect the kitchen extension cost, which is why we’ve asked the experts to tell us all so that you can plan and budget for the kitchen of your dreams.

Our guide will take you through everything you need to know, from the factors that influence kitchen extension cost, to the current prices you can expect to be facing. Keep reading to have all your questions answered and to start bringing your new kitchen into reality.”

For more information also see our Kitchen extensions – London architectural guide.

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GOAStudio London residential architecture media opinion publications 2 Ideal Home | Kitchen extension cost what to budget for a new and large room

GOAStudio London residential architecture and interior design is an award-winning practice, specialising in offering architectural services for residential projects across London.

As your local residential architect our team aims to provide a friendly and professional service for your home project.

Our approach is based on carefully considering the particular aspects of each scheme before coming up with a creative way for you to instil your unique stamp on what we do and how we do it.

Royal Institute of British Architects (RIBA) and Architects Registration Board (ARB).

ARCHITECT SERVICES – See what we can do for you.

HOME DESIGN – Find ideas for your project.

Hackney N16 Kitchen extension

Hackney N16 Kitchen extensionProject description | Hackney N16 Kitchen extension Addition of a single storey side extension to create an enlarged...

Brent commercial to residential conversion corner visualisation 400x250 Ideal Home | Kitchen extension cost what to budget for a new and large room

Commercial to residential conversion creating 2 flats in Brent

Conversion and extension of a vacant corner commercial unit
This project tested the conversion of a vacant Class E corner unit in Brent, together with extension and reconfiguration of the upper maisonette, to create 2 residential units within an existing mixed-use building.

GOAStudio was appointed in 2025 to assess the potential of the site, prepare feasibility and design proposals, and take the scheme through pre-application and planning.

The proposal combined change of use, extension and retrofit works within an existing building in a predominantly residential setting.