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 domestic properties (flats, apartments, houses and other dwellings) they are:

1. Letting a sub-standard property for less than three months when the penalty notice is served: A fine not exceeding £2,000 and publication of the penalty.
2. Letting a sub-standard property for three months or more when the penalty notice is served: A fine not exceeding £4,000 and publication of the penalty.
3. Registering false or misleading information in relation to an exemption: A fine not exceeding £1,000 and publication of the penalty.
4. Failure to comply with a compliance notice: A fine not exceeding £2,000 and publication of the penalty.

Where a combination of offences have been committed by a landlord in relation to a single dwelling the fine is capped at a maximum of £5,000.