Yes, typically, you will need to obtain a new Energy Performance Certificate (EPC) for a commercial lease renewal if you plan to re-let the property after the current lease expires or if any changes to the property require a new EPC. This requirement applies whether you are renewing with the current tenant or leasing to a new one. However, it's important to note that the specific requirements may vary depending on the type of property and any previous valid EPCs in place. Consulting a solicitor can help clarify these requirements and ensure compliance with the regulations.