An overhanging counter for casual eating needs space for knees, for diners to scoot chairs back, and for seating—at least 24 inches for each chair. Price:
About $800 for a prefab freestanding dining island to more than $5,000 for a custom built-in without a countertop.
Similar to shown:
Broyhill Color Cuisine Kitchen Island with slide-out dining table, 30 by 56 inches, in nine colors, starting at $1,289; Wayfair