The Design Process

With Trade Price Warmer Living, designing your dream extension has never been easier. Our simple 6-step process lets you decide exactly what you want your expansion to look like, from its roof and doors to its colours and materials. And with only a 4-week turnaround, you’ll be ready to start building your bespoke extension in no time.

Follow the steps below to get started on your dream DIY extension today!

Design Your Dream Self-Build Extension in 6 Simple Steps

1. Choose Your Base System

You have two options for the foundation of your single storey extension: our easy-to-install Durabase System, or an existing concrete foundation.

2. Measure Your Available Space

Carefully measure the area you want your extension to be built. We can manufacture your extension to almost any size, so you have plenty of options to choose from. It’s also important to consider your budget before making any decisions.

3. Select Your Windows and Doors

After measuring your space, the fun part begins: designing your extension! We offer a wide variety of windows and doors for you to choose from. For an extra touch of practicality, check out our aluminium bi-folding doors, designed to create a seamless transition from indoors to outdoors.

4. Choose Your Roof System

Once you’ve decided on your windows and doors, you’ll have the chance to choose the perfect roof for your DIY extension. We have six different pitched and flat roof options to choose from:

5. Settle on a Style and Colour Scheme

The right colours and materials can make all the difference. From cladding to brick slips, you can choose from a variety of options to create a look that truly reflects your personal style.

6. Upgrade Your DIY Extension With Optional Extras

Finally, it’s time for the finishing touches. By adding optional features like opening roof windows or fixed glass panels to your pitched roof system, you can maximise the natural light and fresh air in your home. Speak to our team to learn more about the options available to you!

Visit Our Showroom

Want to see our self-build extensions in action before you make the leap? Pay a visit to our spacious showroom in Somerset! With over 6,000 sq ft of space, you can explore all of our roof, door, window, and colour options up close. Our friendly team is always on hand to explain the process in more detail and answer any questions you have.

Ready to take the first step towards your dream home? Book a visit to our showroom online and begin your journey to a bigger, better space today!




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.