These changes could potentially cost landlords thousands of pounds, but the government have helped out with a list of things that will help to increase EPC rating. They recommend starting with low-cost measures such as adding insulation to wall cavities, floors, and lofts. They also suggest installing a smart meter and LED lights throughout the property.
To get a rating of C, landlords may have to splash the cash by getting more expensive products such as triple-glazed windows, solar panels, and more energy-efficient boilers.