Green mortgage rates are mortgage offers linked to a home’s energy performance, usually shown by its Building Energy Rating (BER). Some lenders may offer a lower rate or other terms for properties meeting their stated efficiency criteria, but eligibility, qualifying BER levels and conditions vary between providers and can change. Compare the overall cost, including fees and the rate after any introductory period, rather than focusing only on the initial offer. Check the lender’s current criteria and consider independent guidance before applying.