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Rapid Build Home Extension Kits to make life easier for you.

  • SIPs
  • Garden Rooms
  • Building with SIPs
    • Modular House Extensions
    • Garden Offices
    • Garden Gyms
    • Orangeries
  • Case Studies
  • Key Information
    • About Extension Kitz
    • Build Assist
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    • Planning Applications
    • FAQs
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    • Environment
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extension kitz logo

Build it faster, warmer,
stronger and smarter

  • SIPs
  • Garden Rooms
  • Building with SIPs
    • Modular House Extensions
    • Garden Offices
    • Garden Gyms
    • Orangeries
  • Case Studies
  • Key Information
    • About Extension Kitz
    • Build Assist
    • Building Regulations
    • Planning Applications
    • FAQs
    • Testimonials
    • Environment
    • Downloads
  • Gallery
  • Contact
Extension Kitz

Build it faster, warmer,
stronger and smarter

Head Office

Cemetery Works,
Cemetery Road,
Radcliffe,
Greater Manchester,
M26 4FT

sales@extensionkitz.co.uk

0330 166 0877

Extension Kitz

"Build it faster, stronger, warmer and smarter"

We are an established, family run, innovative manufacturer and supplier of Structurally Insulated Panels (SIPs) for single storey home extensions, annexes, pods, garden rooms, and modular educational buildings.

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  • What is a SIP Panel?
  • What is an Extension Kit?
  • About Us
  • Gallery
  • Garden Rooms
  • Garden Gyms
  • Garden Offices
  • Frequently Asked Questions
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Copyright © 2026 Extension Kitz

  • Call us on 0330 166 0877