Your committee should look at something like the Ready Steady Plug solution;
http://www.readysteadyplug.com
As it controls the load it will prevent your buildings power supply from being exceeded. It also allows an easy means to recoup the cost of the power from those charging.
We are in the process of commissioning one of these systems, it can connect to 36 EV’s (we have 9 connecting from the start) and in our instance those wanting to connect will have an outlet installed in their carspace.