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Fill out the form and give us brief details.
We will get back to you with an indicative SIPs extension cost, so you know what to expect.
Once you have an idea of the price of a SIPs extension, you can then make an informed decision.
Or call the experts today on 0330 166 0877
We will get back to you with an indicative SIPs extension cost, so you know what to expect.
Once you have an idea of the price of a SIPs extension, you can then make an informed decision.
Or call the experts today on 0330 166 0877
Maximise Your Space with SIPs
Traditional cavity wall construction typically uses up to 350mm of wall thickness, which can eat into your usable floor space—especially in smaller extensions. In contrast, SIPs (Structural Insulated Panels) use just 147mm of thickness while still exceeding modern insulation and strength standards.
In a 4m x 5m extension, this difference alone can free up around 2m² of additional internal space—enough for extra storage, a larger dining area, or simply a more open feel. With SIPs, you’re not just building faster and stronger, you’re building smarter.
Space gained with SIPs
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Who We Are
Why Choose a bespoke Extension Kitz product?
We are an established, family-run, innovative manufacturer and supplier of lightweight tiled conservatory roofs and Structurally Insulated Panels (SIPs) for single-storey home extensions and garden rooms.
We are the copyright owners, sole Manufacturer, and supplier of the Extension Kitz extension kit.
We are dedicated to transforming and converting your dream into a reality. We have many years of industry experience replacing conservatory roofs and building single-story extensions, garden rooms, orangeries etc. We deliver nationwide.
We can help manage your project from start to finish. And you can have peace of mind knowing that your job is guaranteed and covered by Building Regulations.
Our products are proven, tried and tested, engineered and long lasting.
We are the copyright owners, sole Manufacturer, and supplier of the Extension Kitz extension kit.
We are dedicated to transforming and converting your dream into a reality. We have many years of industry experience replacing conservatory roofs and building single-story extensions, garden rooms, orangeries etc. We deliver nationwide.
We can help manage your project from start to finish. And you can have peace of mind knowing that your job is guaranteed and covered by Building Regulations.
Our products are proven, tried and tested, engineered and long lasting.
Made in Britain
"BUILD IT FASTER, STRONGER, WARMER AND SMARTER"
We're proud to say that all of our SIP panels are manufactured right here in our UK based factory. Every Extension Kitz build is fully assembled and dry-constructed on our factory floor before it ever reaches your site — ensuring everything is perfectly prepared, measured, and ready to install.
By building in-house, we maintain complete quality control, reduce on-site disruption, and deliver a more seamless experience for homeowners and installers alike.
By building in-house, we maintain complete quality control, reduce on-site disruption, and deliver a more seamless experience for homeowners and installers alike.
"Build it faster, stronger, warmer and smarter"
HEAD OFFICE
Cemetery Works, Cemetery Road, Radcliffe, Greater Manchester, M26 4FT
sales@extensionkitz.co.uk
0330 166 0877EXTENSION KITZ
We are an established, family run, innovative manufacturer and supplier of Structurally Insulated Panels (SIPs) for home extensions, annexes, pods, garden rooms, and modular educational buildings.
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