Our Technology
Premium materials from trusted building suppliers
Traditional Results, Modern Methods
Our extensions look and feel exactly like a conventional build — because they are. As experienced extension builders and suppliers, we use advanced construction technologies to deliver the same premium finish faster, with less disruption, and to a higher standard.
Your neighbours won't know the difference. Every Spectra Extension matches your existing property seamlessly. We source premium materials from trusted suppliers and combine them with skilled craftsmanship. The only difference? We build in weeks, not months.
RADIX Screw Pile Foundations
Revolutionary steel foundations that eliminate the need for concrete, excavation, and lengthy curing times.
We've partnered with RADIX Group, the UK's largest ground screw and screw pile manufacturer and supplier, to deliver foundations that are faster, cleaner, and more sustainable than traditional concrete.
Key Benefits
- Up to 70% Faster Installed in hours, not weeks. No waiting for concrete to cure.
- Immediate Load-Bearing Build can start immediately after installation.
- All-Weather Installation Can be installed year-round, even in winter conditions.
- Minimal Disruption Minimal excavation, no concrete trucks, no mess in your garden.
- 50% Less Carbon Less than half the embodied carbon of concrete foundations.
- Versatile Works in most soil types including slopes, clay, and high water tables.
Technical Specifications
Learn more about this technology at radixgroup.co.uk
Individually Engineered
Every Spectra Extension is uniquely designed by our structural engineers and in-house designers to maximise performance and deliver uncompromising quality.
Unlike off-the-shelf solutions, we engineer each extension from the ground up. Our team analyses your property, your requirements, and local conditions to create a bespoke design that outperforms standard extensions in every measurable way.
Why Bespoke Matters
- Superior Thermal Performance Our extensions achieve exceptional U-values, significantly outperforming building regulations and reducing your energy bills year after year.
- Optimised for Your Property Every design accounts for your property's unique characteristics, ensuring seamless integration and maximum usable space.
- Built to Last Engineered using quality materials and methods that stand the test of time.
- Lower Environmental Impact Up to 50% less embodied carbon than traditional builds, with highly efficient insulation reducing ongoing energy consumption.
- Fixed Price Guarantee Every Spectra Extension comes with a fixed price confirmed in writing before work begins. No hidden extras, no budget overruns — just a straightforward, transparent price you can plan around with confidence.
Performance Advantages
Solid Brick & Timber Frame Construction
A true timber frame building with solid brick outer walls — combining the speed and thermal efficiency of modern construction with a genuinely traditional brick finish.
Every Spectra extension is built using precision-engineered timber frame construction with solid brick outer walls. We source bricks to match your existing property, so the finished extension looks like it was always part of your home.
Key Benefits
- Real Brick Outer Walls Solid brick construction — not cladding or slips. Your extension is built with real bricks that match your existing property.
- Perfect Property Matching We source bricks to match your existing brickwork in colour, texture and mortar profile for a seamless finish.
- Precision-Engineered Timber Frame Individually designed timber frame structure, factory-prepared for fast, accurate on-site assembly.
- Superior Thermal Performance Timber frame construction delivers excellent U-values, keeping your extension warm in winter and cool in summer.
- Faster Than Conventional Building Timber frame goes up in days, not weeks — significantly reducing your overall build time compared to traditional block-and-brick.
- Proven Construction Method Timber frame is one of the most established building methods in the UK, used in homes for centuries.
Why Timber Frame
What Our Clients Say
Trusted by homeowners across Milton Keynes
— Sarah M., WolvertonFantastic job from start to finish. The team were professional, tidy and always on time. Our new extension has completely transformed our home.
— Helen P., OlneyWe've used CBS twice now and wouldn't go anywhere else. The attention to detail is second to none and they always leave the site spotless at the end of each day.
— David & Karen R., BletchleyFrom the initial consultation through to handover, everything was handled brilliantly. The fixed price quote meant no surprises. Highly recommend.
Ready to Build Smarter?
Get a free, no-obligation quote and discover how our advanced building technologies can transform your home with a single storey extension.