
All landlords must now give new tenants a certificate showing the energy efficiency of their rented property.
Buildings up for rent must be examined and given an Energy Performance Certificate (EPC) detailing their efficiency on a scale from A to G.
The rating, similar to that on home appliances, is intended to allow potential tenants to consider energy efficiency and fuel costs.
A £200 repeatable fine can be levied per property on landlords who refuse.
The new scheme, which comes into force from 1 October, is similar to the controversial Home Information Pack for sellers, and will check such areas as insulation, double-glazing and the performance of the boiler and appliances.
One landlord, James Fraser, says it seems odd that homeowners without a certificate can be fined, although there will be no obligation for landlords to act on the contents of the report.
He told the BBC: "Many landlords may well come away with the point of view that the government is simply trying to inflict more expenses on landlords for no reason whatsoever."
The EPC and a recommendation report must be provided free of charge by landlords when: