With the United Kingdom boldly pledging to reduce nationwide emissions by 40% by 2030, and buildings contributing to 12% of current emissions, it comes as no surprise that focus is on property to become more environmentally friendly. To help achieve this goal, Minimum Energy Efficiency standards has said that any property with an efficiency rating of F or G will be illegal to let for any new leases after 1st April 2018, and from 1st April 2023 for existing leases.