1 Depending on the size of an escalator, the average escalator can be within the $125,000 to as much as $325,000. 2  Standard escalators, today, usually cannot be any taller than 60 feet; however, these regulations may vary depending on your location. Standard escalators, today, usually cannot be any taller than 60 feet; however, these regulations may vary depending on your location. 2  The size is usually the main factor. 3  By the foot, an estimate based on data gathered online, the cost could be between the $4,000 and $8,500 mark.