What's the typical height of a storage unit? Most storage units have ceilings around 8 feet tall—that's the standard at Extra Space Storage locations. But the real secret is knowing how to stack it, not just measure it. That height gives you enough space to stack boxes, furniture, and appliances to maximize every square foot of your unit. Here's what you need to know about storage unit heights: Standard height: 8 feet tall at most locations Some locations offer higher ceilings for tall vehicles