If you don’t know your whole-building energy use, but handle all utility bills, your utility company will provide you access upon request. If you have separately metered tenants, you will need to get utility data from the non-residential tenants in order to account for all energy use. The forms needed for these data requests can be found on the District Department of the Environment’s benchmarking website.
If you are benchmarking in order to comply with District laws, then your non-residential tenants are required to provide you with the energy, water, and space use data needed by Portfolio Manager.
Please note that the DC law asks for you to report water use as well energy use.
It is also possible to benchmark only common spaces, which is still quite useful for monitoring energy use over time. If you have a multifamily building with separately metered tenants, you may only be able to benchmark common areas accurately.