I’ve read a few articles mentioning ESOS fees and also discussed the matter during my ESOS Lead Energy Assessor training. One source suggests prices in the range of £5,000 to £25,000 for most businesses and upwards of £50,000 for large manufacturing businesses. I do agree that the bigger companies that occupy a large number of buildings will be time consuming to audit but I’ve met with some businesses that fall into the ESOS requirement that occupy just one or two buildings and these sort of fees just won’t apply.
The ESOS guidance states that compliance for buildings can be achieved using DECs (Display Energy Certificates). To provide recommendations to reduce energy consumption, profiling is required to separate building energy use into common areas, such as lighting, heating and equipment. An experienced energy assessor will be able to do this when visiting the site and considering the activities within the building.
In a lot of cases, companies will rent the buildings they occupy. Changes may be acceptable to the landlord but extensive alterations and upgrades may not be a suitable option, especially if a building lease is limited to a matter of a few years and the landlord can request the building be returned to its original state when the tenant vacates. In such instances, appropriate energy saving recommendations may be no cost / low cost and linked more closely to occupant behaviour.
Where companies occupy just a small number of buildings, transport energy may be a bigger part of the overall energy consumption and thus there may be energy savings available.