New build homes save homeowners on average £420 a year on bills compared to older properties, according to a new report from the Home Builders Federation (HBF) and Octopus Energy. As the industry begins New Homes Week, an annual event which celebrates the benefits of new build homes, the report, Watt a Save, reveals that buyers of new properties can achieve a saving of 21% on energy expenditure, with energy efficiency features including heat pumps, solar panels and car charging points fitted as standard on many new homes.