Your Local Experts in Stunning Home Extensions
Home Extension Builders in Royston, Cambridgeshire & Hertfordshire.
Who we are
Creating spaces that inspire and delight
At CB Building Services, we’re passionate about creating beautiful home extensions and renovations that transform how you live. Based in Royston, we bring exceptional craftsmanship and innovative design to homes across Cambridgeshire, Hertfordshire and beyond. Our team combines years of experience with a fresh approach to extensions, ensuring every project feels timeless, whether it’s something ultra modern or more traditional.
- 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
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From constructing your extension to fitting units, plumbing and electrics.
What we do
From traditional charm to modern elegance: Extensions for every style
We create stunning home extensions that blend seamlessly with your property. From single-storey to double-storey additions, we handle projects of all sizes with care. Our expertise includes everything from large kitchen extensions to smaller porches. We manage the entire process, from concept to completion, including planning permissions and final touches. Our services include:
- Single storey extensions
- Double storey extensions
- Kitchen extensions
- Porch extensions
- Glass roof extensions
- Rear and side return extensions
- Loft extensions and conversions
“Charlie and his team from the outset were not only exceptionally knowledgeable, but an absolute pleasure to work with throughout the project. Their attention to detail and communication at every point in the project was faultless. I couldn’t recommend them enough and wouldn’t use anyone else in the future.”
How we work
From concept to completion: Turning vision into reality
Creating the perfect extension requires more than just building skills – it demands an understanding of how spaces work together and how your family lives. We take the time to understand your daily routines, your long-term plans and your design preferences. This thoughtful approach ensures your extension enhances your lifestyle rather than just adding square footage.
- Detailed design consultations
- Planning permission and building regulation support
- Project management coordinating all trades
- Structural engineering solutions
- Interior design guidance
Our latest work
Discover our recent extensions we have built across Hertfordshire, Cambridgeshire & beyond.
Double-Storey Transformation
A stunning extension featuring an open-plan kitchen with bifold doors and two spacious bedrooms.
Seamless Summer Extension
A flawlessly executed project delivered on time, on budget and with exceptional build quality.
Exceptional Kitchen Extension
A beautifully crafted kitchen extension delivered with flawless attention to detail.
Trust the experts
As TrustMark approved contractors and proud members of the Federation of Master Builders, we’re recognised for our commitment to quality, reliability and customer satisfaction. Our team holds relevant qualifications including City & Guilds certifications and we’re registered with key industry bodies including Gas Safe, NICEIC for electrical work, and FENSA for windows and doors.
Ready to extend your home?
Contact CB Building Services today for a consultation about your extension project.