average square footage per structured parking space
A taller structure generally has a less efficient parking layout, which translates into more square feet for each parking space. 3- Parking below-grade â Parking below-grade is much more expensive than parking above-grade. A parking structure that is five levels above-grade may cost, say, $50 per square foot. If this same structure is depressed one level into the ground, the cost can increase approximately 15% to $57.50 per square foot.