According to ProLine Range Hoods, while the average is 36 inches, that doesn’t mean your countertops have to be this height. If desired, you could customize your countertop or island to a different size to better accommodate your specific needs. However, keep in mind that the island is rarely shorter than the countertops—It’s almost always equal or slightly taller, per Interiors Place.
One of the most common ways homeowners make their island and countertop different heights is by raising their island to bar height, usually 42 inches. This higher surface is typically used for additional seating in the kitchen. However, some may dislike the appearance of an extra-tall island surrounded by shorter countertops. If so, they could choose a tiered island where the side facing the rest of the kitchen is 36 inches tall while the other side is 42 inches tall. These islands usually have a sink in the middle, hidden behind the high bar.