Every electrical installation deteriorates with use and age. It is important for the person responsible for the maintenance of the installation (such as the householder or landlord) to be sure that the safety of the user is not put at risk, and that the installation continues to be in a safe and serviceable condition.
The cost of an electrical safety check or EICR depends on these factors:
The size of the property
The condition of the installation
How many circuits
How many consumer unit