Is this an existing building or out of the ground, either way this might will be a refresher or a eye opener as to the design aspects of things. The following is a list of things that might or might not be of considertion but might well effect your electrical package.
How will the building be classified, will the building be sprinkled, or other type of fire protection? Will machine chemicals
cause any consideration on any wiring methods?
Where the power pole or source to be on the property? Who's to set poles or run the underground from POCO service?
Where's the Data and Sanaity Line's, what are the requirement for Data/Phone (usually sub'd out but you run the conduit).
Don't let them put the power and the trash dumper in the same service area, if it's at all possible
IE don't mix power and oil- chemicals in outside power area. Ballards for power protection if outside?
Depending on State Building Codes, handicap toilets, means of egress lighting requirements might well be needed
or to be upgraded!
The HVAC contractor has some important numbers for you! As does the Plumber!
What about security wiring? Outside lighting, signage.
If you have a good set of drawings of a previous job just open up the Site, electrical, architecural, reflective ceiling plans, review them and you should come up with the same as stated above and more of your potential job!
Good Luck!