There are two types of building survey. The initial survey will consist of the surveyor collecting data such as, the location of meters, building height, number of floors, distance between premises and the gas and electricity meters. This information is needed to understand whether the building will need to have Alt HAN Equipment installed. On the second survey, more information will be captured to understand what type of Alt HAN Equipment will be needed to be installed. The second survey is only required if Alt HAN Equipment is needed to be installed. Both types of surveys do not require access to individual flats and are only visual, therefore nothing will be moved. Your electricity and/or gas supply will not be impacted in any way.