Kitchen Extensions

Kitchen Extension Builders in Cambridgeshire & Hertfordshire.

From build to finish

Creating spaces that bring families together.

At CB Building Services, based in Royston, we specialise in creating thoughtfully designed kitchen extensions that become the heart of your home. Serving families across Cambridgeshire and Hertfordshire, we combine years of expertise with innovative design to deliver stunning spaces that are both practical and beautiful, whether you prefer a sleek contemporary style or a traditional family kitchen.

Kitchen Extension - CB Building Service
Kitchen Extension - CB Building Service
Kitchen Extension - CB Building Service


Why choose us

Trusted expert builders

Members of the Federation of Master Builders
Our accreditations include Gas Safe registration and NICEIC certification.
TrustMark Approved
Government-endorsed contractor, we’re committed to quality, reliability, and consumer protection.
No outsourcing
The same team that quotes your project will see it through to completion.
From build to finish
From constructing your extension to fitting units, plumbing and electrics.



What we do

From compact breakfast areas to grand kitchen-dining spaces.

We specialise in every type of kitchen extension, from single-storey rear extensions that create beautiful open-plan living to wrap-around designs that completely transform your ground floor. Whether you need a compact extension to accommodate a kitchen island or a substantial addition for the ultimate family kitchen-diner, we bring the same attention to detail and craftsmanship to every project.

  • Natural light expertise
  • Open-plan specialists
  • Single-storey rear extensions
  • Side return extensions
  • Wrap-around extensions
  • Kitchen islands and peninsulas
  • Glass-roof extensions
  • Utility room additions
Single Storey Extension - CB Building Service

“I can, without hesitation, highly recommend CB Building Services. Not only are Charlie and Ellis incredibly hard working, but they are also helpful and supportive. Charlie has been there to bounce ideas off and to guide me in what is a very daunting and expensive process. My extension was built quicker than expected, to a high standard and Charlie has surpassed all expectations. I have sung his praises to everyone and shall continue to do so. Thank you for all your hard work.”

Charlotte Conner

How we work

From build to unit installation.

From planning through to final installation, we manage every aspect of your kitchen extension project. This includes building the extension to fitting kitchen units and installing electrics and plumbing. Our experienced team coordinates all trades, maintains clear communication throughout and ensures minimal disruption to your daily life.

Double Storey Extension - CB Building Services in Royston, Cambridgeshire & Hertfordshire
Approved builders

Trusted kitchen extension specialists

Your kitchen extension represents a significant investment in your home, which is why we maintain the highest professional standards throughout every project. We are TrustMark approved contractors and we hold all relevant certifications for the complex work that kitchen extensions require, including electrical installations for your new appliances, gas work for hobs and ovens and plumbing for sinks and dishwashers.

Ready to transform your kitchen?

Contact CB Building Services today for a consultation about your kitchen extension project. Let’s create the perfect culinary space where your family’s best memories will be made.