For the protection of consumers and UK residents, the United Kingdom has instigated a system of certified energy assessor professionals to measure the efficiency of the energy use in each of its residences. The focus and the mission behind the legislation is to encourage both residential and commercial installation and use of green energy and renewable energy resources.

Each certificate for each energy assessor has to be produced by those with the federal government has determined qualified and competent to do so. The UK government is still evaluating additional measures to verify the competence of each energy assessor.

At this point in time, the legislation in the UK for evaluating an energy assessor says that she or he must be suitably competent or qualified to produce an energy assessment. By suitably qualified the legislature means someone who has experience and or learning and training equal to the requirements of the National Occupational Standard regulations for that occupation.

An energy assessor of the UK government is going to have the responsibility of completing primary tasks that relate to the newest of the United Kingdom measures for energy efficiency. While energy assessment is now offered by various organizations, only a portion of these energy assessors are actually trained and have earned an Energy Performance Display Certificate. This certificate is what gives them the authority to call themselves an accredited energy assessor. Each energy assessor must know and follow the newest version of the UK governments National Calculation Methodology. There are several different methodologies, dependent on whether a structure is residential and or about to be sold or rented, under construction, or of mixed use.

An energy assessor needs to meet two criteria in order to practice. The first is the energy assessor qualification, a document of energy inspection that shows technical competence. In the process of being updated by the National Occupational Standard, the qualification will be approved by the national Qualifications and Curriculum Agency.

An energy assessor also needs accreditation. Accreditation may be possible in several specializations such as construction, commercial and residential. The scope of qualification will cover many energy inspection areas. An energy assessor will be evaluated in his or her assessment of energy performance, perhaps in buildings under construction, in rental properties or in single family homes, for example. Each energy assessor is only allowed to conduct energy inspections in the area or areas covered by her or his current accreditation and qualification.

Additional limitations may be placed on an energy assessor beyond the types of dwellings or circumstances. An energy assessor might, for example, be determined certified for a specified number of years, after which he or she might have to retrain, upgrade his or her skills and or retest for a new certification.

Several companies in the United Kingdom have the approval of the Secretary of State to oversee the accreditation for energy assessors who wish to evaluate the energy efficiency of existing structures. These companies are RICS, Northgate, NES, Elmhurst and BRE. Many labour unions offer classes and certification and recertification training for energy assessors as well.