Well, it depends on what type of restaurant you have. Casual dining restaurants like Chili's or Applebees will average between $550 and 650. $2,800,000 / 4500 sq. ft Fast food chains like McDonalds and Chick-fil-a do better averaging about $1000 per foot. $1,300,000 / 1200 sq. ft Up scale restaurants Ruth's Chris or Morton's are in the middle, around $800 $4,500,000 / 5250 sq. ft