1 On average, a boat detailing professional is going to charge anywhere from $13 to as much as $40 per foot, depending on what needs to be done. 2  Those that want to do the job themselves can purchase all the equipment. The site, RinkerBoatOwners.com shows what the package for their boat detailing service will include. 2  The price for detailing a boat according to this site ranges from $500 to as much as $1,800.