An Energy Performance Certificate is needed whenever a property is built, sold or rented. You must order an EPC for potential buyers and tenants before you market your property to sell or rent. In Scotland, you must display the EPC somewhere in the property, eg next to the boiler or in the meter cupboard.
From April 2018, landlords of privately rented domestic and non-domestic property in England or Wales must ensure that their properties reach at least an Energy Performance Certificate (EPC) rating of "E" before granting a new tenancy to new or existing tenants. These requirements will then apply to all private rented properties in England and Wales - even where there has been no change in tenancy arrangements - from 1 April 2020 for domestic properties, and from 1 April 2023 for non-domestic properties.
An EPC inspection involves a detail assessment of EPC property floor area calculation, heat loss perimeter, walls construction, windows, roof insulation, Central heating system, heating controls, hot water system, any secondary heating system etc.