Dear Expert: How big does my kitchen need to be in order to incorporate an island?
A: First of all, you need to determine if an island is the right solution for space. But in general, you need to make sure the space between the island countertop and another work counter is 42” minimum (48” for two-cook kitchens). And you need a minimum of 36” for walkways on the non-working side of the island.
You will also need to plan on adequate counter space if you plan on having a cooktop, range or sink on the island.
— Tim Aden
Sawhill Custom Kitchen & Design