Home Extension Kits

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Unrivalled thermal performance

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Finance options available
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Building reg approved

DIY Home Extension Kits from just £1,200 per square metre – with any style roof!

Home Extensions made easier

At Trade Price, we take the stress out of extending your home. With an affordable price point and easy installation, our home extensions allow you to create a stunning new room without breaking the bank – or breaking a sweat!

Eager to get started? Thanks to our rapid turnaround, you can enjoy a brighter, more spacious home in no time.

A few reasons why homeowners love Warmer Roof Extensions

  • Tick in a Circle Icon BlueSave money on heating bills
  • Tick in a Circle Icon BlueAdd significant value to your home
  • Tick in a Circle Icon BlueExtends your living and entertaining space
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Request call back from our Extension Team to discuss your options

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Design Flexibility

  • Tick in a Circle IconChoose from a Pitched Tiled Roof or Flat EPDM Rubber Roof
  • Tick in a Circle IconConfigurable to any window and door layout
  • Tick in a Circle IconCustomisable features such as pelmets, soffits, glazing panels and much more!
  • Tick in a Circle IconPrecision engineered for a consistent high quality finish
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Thermal Efficiency

  • Tick in a Circle IconOn average four times more thermally efficient than traditional extension
  • Tick in a Circle IconBase U-Value 0.18 Wm²K
  • Tick in a Circle IconWall U-Value 0.16 Wm²K
  • Tick in a Circle IconRoof U-Value 0.15 Wm²K
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Full Kit, One Supplier

  • Tick in a Circle IconNo bricks or building materials required
  • Tick in a Circle IconDesigned to be fitted by one installation team
  • Tick in a Circle IconFull kit included
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Quality Materials

  • Tick in a Circle IconApproved Building Inspector System Approval
  • Tick in a Circle IconBBA approved materials
  • Tick in a Circle IconStructural grade timber shell


Home Extension Kits Options

Buy now, pay later

Can’t pay all at once? Not a problem. With our Buy Now, Pay Later option, you can spread the cost of your installation over a period of weeks or months. Enjoy all your new extension has to offer, without worrying about any upfront fees!

Easy to build

Our DIY kits make installation a breeze. We include all you need to complete your build in one package – no bricks or extra building materials needed.

Our step-by-step instructions are designed to be simple and straightforward, so even if you have no previous experience, you can have your extension up and ready for use in just a matter of days.

Watch our video to see just how easy building your own extension is!

Customise Your DIY Home Extension

Choose from a fantastic range of extras to make your home extension uniquely yours.



Read our complete guide to single storey extensions

Small Home Extension

Why Choose a DIY Extension Over a Traditional Extension?

Traditional extensions are built by a team of professional installers, while DIY extensions are built with your own two hands. So, why bother with a self-build?

Simple: cost. A traditional extension will set you back thousands more than a DIY extension, as you’ll need to pay for builders, structural engineers, architects, and a survey – not to mention the actual cost of the materials!

That’s not all. There are plenty of other reasons to choose a DIY kit over a traditional extension, such as:

  • A DIY extension is built on your own time, at your own pace. You don’t need to wait months for builders to be free to start and complete the project.
  • Our DIY extension kits are precision engineered and fully made-to-measure. This guarantees an exceptional level of quality throughout all components, as well as a perfect fit onto your home.
  • Unlike traditional extensions, which typically only have warranties of 6 months to 2 years, our kits are covered by an unrivalled 10-year product guarantee.

Still not sold? Click below to learn more about why investing in a DIY extension kit is a better choice than a traditional build!

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Five times faster to build

Our unique, pre-fabricated modular pod system ensures a speedy installation with minimal disruption to your home and garden.
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Modular Extensions Sheets
Showroom Edwardian Double Hipped Roof
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Stunning External Finishes

Your extension should be as unique as your home. Choose from a variety of colours, designs, and finishes, and create a space that matches your vision perfectly.

Modern or classic? Minimal or intricate? If you can imagine it, we can create it.

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Your Home Extension Kit is Building Control Compliant

Use our System Approval to fast track your Building Regulations process and promote customer confidence
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As an FCA-authorised provider, we take great pride in offering our customers not only exceptional products but also flexible financial solutions. Our tailored advice on a range of financing options, including the popular buy now, pay later scheme, ensures that you can secure your dream home extension with ease and confidence. Call us today for a comprehensive consultation.

DIY Home EXTENSIONS made easy

Our home extensions kits will be delivered to your door in as little as 3 weeks, along with a step-by-step installation guide to make building them quick and easy.


The Warmer Roof system you’ve chosen stands as a testament to quality and durability, having undergone rigorous independent testing and analysis. This thorough evaluation was conducted by a nationally recognised and accredited building control approvals agency, ensuring that your Warmer Roof meets current Building regulations.