Green mortgage rates are rates offered by some lenders for homes that meet specified energy-efficiency standards, often based on the property’s BER rating. Eligibility, pricing, fixed or variable terms and required documents vary between lenders and can change over time. A more energy-efficient home may have lower running costs, but that does not mean a green mortgage will always be the cheapest option overall. Compare the full cost, including fees and repayment terms, and confirm current conditions directly with lenders or a regulated adviser.