Make Space
For Living

Because much of the work is done off-site (walls built to measure, roof components prefabricated), the on-site installation is around 50% quicker than a traditional build. This reduced build time means less disruption, less exposure to weather, and faster project completion.

Your Guardian Home Extension can be tailored to your needs. The system is very flexible and can meet a huge array of design styles and requirements. You can select different exterior finishes (brick, render), roofing materials (tile, slate), glazing options (roof lanterns, large windows/doors), and lighting to suit your home. We have developed a selection of popular styles that you can view on our website for more inspiration.

The three top benefits are thermal performance, speed to build, and space saving. The Guardian Warm Wall system achieves the required thermal performance with a much thinner profile, meaning you can gain up to 20% additional floor space versus using much thicker traditional bricks and mortar methods.

The system is engineered for superior energy efficiency. By integrating the Guardian Warm Roof with Kingspan TEK walls, your extension meets or exceeds current insulation standards. The precise U-values depend on the design, glazing options, and specification you choose. Independent testing reports from the BRE (Building Research Establishment) can also be provided to prove thermal performance.

Yes. The system is engineered to comply fully with UK Building Regulations. Your Certified Installer will manage the regulatory approvals and certifications, ensuring your extension meets structural, fire, and thermal performance requirements. We supply a wide array of supporting documentation to all Certified Installers to support Building Control applications.

Product guarantees are provided for all Guardian-supplied components of your Guardian Home Extension, and your Certified Installer will provide additional guarantees for other components selected. This typically includes a 10-year workmanship guarantee from the Certified Installer and an insurance-backed warranty in case the installer ceases trading — giving you full peace of mind.

One of the big advantages of the Guardian Home Extension is greatly reduced disruption. Since most structural elements are pre-manufactured and delivered to site ready to assemble, there's far less time with noise, scaffolding, mess, or exposure to the elements. The process is designed to be efficient and clean.

Yes. The system is intended to work seamlessly with your existing home. Whether you want to build a side or rear extension, the modular design allows you to attach to your current walls, rooflines, and internal layouts with full design flexibility.

You can choose from a range of finishes that blend with or complement your existing home, including brick, render, tile, slate, and various glazing or lighting options such as roof lanterns, large bi-fold doors, and slimline windows. The flexibility in design helps ensure your extension looks like a natural part of your home.

Costs depend on size, specification, finishes, glazing, site access, and structural complexity. Because each extension is bespoke, we recommend contacting your local Certified Installer for a detailed, no-obligation quote.

Planning permission: In many cases you may not need full planning permission if your extension falls under permitted development rules — but this depends on your property, local regulations, and design. Building Control is always required. Your Certified Installer will manage the building control approvals and ensure the extension is fully certified.

Skipping approvals can lead to serious consequences: structural risks, difficulty selling your home, or being required to remove or modify the extension at your own cost. Always use a Certified Installer who handles all permits and inspections properly.

Guardian has a network of Certified Installers who are vetted and trained to install both the Guardian Warm Roof and the Guardian Home Extension system. They understand the regulatory, structural, and finishing details necessary for quality installations.

You can use our website's installer finder form or call our customer service number. We match you with a nearby Certified Installer who will survey your site and provide a full proposal and specification.

If problems arise, contact your Certified Installer who has full records and detailed project files. If you cannot reach them, you can escalate your concern to Guardian Building Systems' customer services. Be sure to reference your project's guarantee and installation date.