Need to drill post holes? Hire professionals to get the job done. Post Holes $12 per hole, minimum 20 hole charge, for 6" Auger Size. $14 per hole, minimum 20 hole charge, for 9" Auger Size. $17 per hole, miminum 29 hole charge, for 12" Auger Size. Please have all underground lines (power, sprinklers, gas, lights, etc.) marked clearly. Call or email today!