The complexities of measurement and quantification of embodied carbon for building products has been vastly improved by using a Whole Life Carbon Assessment methodology. Our case study looks at a domestic project completed in 2018 using specially selected natural materials and high levels of fabric insulation. The results are excellent with an A+ rating for upfront Carbon (used during construction and manufacture) and an A++ for overall embodied carbon, proving that we can build buildings with the highest environmental standards.