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
Premium Brick Slip Finishes
Authentic brick finishes that seamlessly match your existing property, combining traditional aesthetics with modern performance.
We source our brick slips from the UK's largest brick slip supplier and stockholder. Their extensive range ensures we can match virtually any existing brickwork, from Victorian to contemporary styles.
Key Benefits
- Authentic Appearance Real clay brick slips that are indistinguishable from traditional brickwork once installed.
- Perfect Property Matching Extensive range allows us to match your existing brickwork for a seamless, always-been-there finish.
- Three Style Ranges Choose from Handmade, Modern, or Reclaimed styles to achieve your desired aesthetic.
- Lightweight Construction Significantly lighter than traditional brick, reducing structural load without compromising appearance.
- Long-Term Durability Manufacturer warranty backed by decades of proven performance in UK conditions.
- Fast Availability UK's largest stockholding means no project delays waiting for materials.
Why Brick Slips
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.