Mobile office trailers are available in many sizes to comfortably accommodate up to ten or more occupants. Typical sizes range from roughly 200 to 1,200 square feet, although in some areas larger sizes may be available. Larger office trailers may contain a restroom. Delivery includes leveling the trailer and setting up stairs, if needed. Interiors can be customized to resemble traditional, interior office spaces. Long-term renovation and new build construction sites frequently maintain at least one office trailer.