The Energy Efficiency (Private Rental Property) (England and Wales) Regulations 2015 set out the penalties for non-compliance with the Minimum Energy Efficiency Standard (MEES).  For non-domestic properties (shops, offices, industrial & agricultural buildings and other non-dwellings) they are:

• Letting a sub-standard property for less than three months when the penalty notice is served: a fine not exceeding the greater of £5,000 or 10% of the rateable value up to a maximum of £50,000 and publication of the penalty.
• Letting a sub-standard property for three months or more when the penalty notice is served: a fine not exceeding the greater of £10,000 or 20% of the rateable value up to a maximum of £150,000 and publication of the penalty.
• Registering false or misleading information in relation to an exemption: a fine not exceeding £5,000 and publication of the penalty.
• Failure to comply with a compliance notice: a fine not exceeding £5,000 and publication of the penalty.