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The government has launched tough laws for Energy Performance Certificates (EPC) beyond what the EU demands.

The additional details, including logging the EPC on a national register, will cost home buyers 拢360m more than applying the directive as required by Europe.

By October 2008, all buildings will require EPCs. They are valid for 10 years, but the government鈥檚 decision to go beyond European rules means every time a home is sold in England it will need a new certificate, even if 10 years have not passed.

In addition, it must have been produced in the three months before the house was put on the market. These rules do not apply to non-domestic buildings.

Green groups have welcomed the tougher standards but there is industry concern that there will not be enough inspectors to carry out the volume of work.

Richard Kauntze, chief executive of the British Council for Offices, said: 鈥淭he biggest hurdle yet to be overcome will be training the suggested 6000 inspectors required. The government has yet to release details of the A-G rating scale or training courses.鈥�

Even the government acknowledged that it might have asked for too much. It said: 鈥淭here is a risk that there will be insufficient experts to carry out the surveys. Landlords may wish to rate all their portfolio in the first few years.鈥�

The government also admitted it did not expect full uptake of the new rules. It said: 鈥淭here is a risk that in some sectors, such as small and medium-sized enterprises which own small commercial buildings, compliance levels will be low and the impact of EPCs reduced.鈥� It predicts that 90% of small buildings and 95% of large buildings will comply.

The certificate will include an energy rating, as well as advice from the Energy Savings Trust on making the building more energy efficient. The ratings will range from A to G, with A the best and G the worst. Energy use will be calculated using the SBEM software, which is also used for Part L.