MHCLG have now issued further guidance which specifically includes reference to energy assessments in non-domestic buildings.
Further to moving home guidance published on 15 May 2020, MHCLG has today updated its guidance on meeting the regulatory requirement to secure a valid Energy Performance Certificate on marketing a property during the Coronavirus (COVID-19) outbreak.
Energy assessments can continue in both domestic and non-domestics properties and should only be conducted in accordance with:
The full updated guidance is available here: https://www.gov.uk/guidance/coronavirus-covid-19-energy-performance-certificates