I am able to provide the energy use on a yearly basis of all buildings in Denmark. It is a great statisical investigation, since it is for all buildings buit later than year 2012 and the size is larger than 10.000 m2 in order to be comparable with the building to be certified. 

In this connection I am possible to find three numbers, which is the total energy use for heating, water respectively electricity. I will by experience of the usage of typical administration buildings in Denmark estimate the plugin energy use and subtract that from the total energy use in order to find the building related energy use.

Is that an acceptable way to go in order to fulfill the LEED requirement?

I will not have the possibility to show the energy bills since the number of buildings is huge and the data on building level is confidential.