Modular House Extension Building Contractor Northampton Milton keynes luton Daventry Towster Bedford

Modular Extension Builder

Modular Extension Builder UK

Transform your home with a Next Generation Modular Extension using the most advanced, energy-efficient building system available, to create a comfortable and affordable living space. Guardian extensions are fabricated off site and then delivered and erected within two to three weeks, avoiding the chaos and upheaval of having builders on site for months on end.


The Guardian modular extension provides a spacious, open-plan extension to your home using cutting edge construction techniques. Your new extension will be comfortable and warm with outstanding energy-efficiency with a U-value of 0.10 W/m2K, it is the most energy saving home extension available.


Being of modular construction, Guardian extensions come with insulated roof and walls, double-glazed windows and strong, steel-reinforced structures, and are an affordable alternative to a traditional brick-built structures. We can match your existing brick, render or stone walls as well as the roof tiles, so the completed room matches the rest of your house. Contact us today to arrange a free no obligation Modular House Extension quotation,

Book a Free Survey

We do not employ cold-calling salesman so you will never feel pressurised. 


Following a detailed discussion and measuring of your property, we will be able to offer expert help & advice in making your ideas become a reality. 


We will then send you a detailed quote based on our visit. 

innovative modular Extension

Guardian modular extension building contractor picture Modular House Extension Northampton Bedford

  • Ridge Cappings to match roof tiles or slates
  • Choice of roof tiles or slates
  • Standard rainwater systems
  • Breathable Guardian waterproof membrane
  • Exterior grade plywood
  • Structural pre-engineered frame
  • Ventilated roof eliminates condensation
  • 3 layers of high performance rigid Kingspan insulation board (125mm) U-value 0.18 W/m.K (England & Wales) and 0.15 W/m.K (Scotland)
  • Choice of external finishes
  • Kingspan TEK Building System
  • Internal flooring
  • External flooring
  • Velux Roof Windows (Extensive Range
  • Modular Extension Building Contractor UK

Guardian Warm Roof Installation - Conservatory Roof Replacement- Tiled - Slate - UPVC Roof systems
FENSA Approved Installer UK Double glazing - UPVC Installer - Nottingham - Luton - Bedford - Harrold
Certass Approved Installer - Modular extensions - Building extensions - Windows and Doors installer
Elite Home Improvements Ltd UK Installer of Extensions, Orangeries, Conservatories, Windows & Doors
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Velux Windows Approved Installer for Northamptonshire Bedfordshire Bedfordshire Roof windows install

Guardian extensions are individually tailored to suit your needs. By combining Kingspan Tek Panels with the Guardian Warm Roof System, you can truly revitalize your home, creating a beautiful, elegant working, relaxing or entertaining space. Check out this great video for some of its highlights. Book a free Survey.

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