Bert:
Based on 'cost' amounts that various EC's put on permits, service change goes from $500 to $2500 (100-200amp resi, 1 phase)
Based on my personal exp, a 200 amp job should top out at around $1750 to $2000, soup to nuts
I have not seen a "unit" price that works, there are many variables as the above posts stated.
John