When looking into door contractors, the cost of installation can vary greatly depending on various factors. The door contractor will typically charge an hourly rate and fee for supplies. Depending on door type and door hardware options, door contractors may be able to offer discounts or lower their rate if package deals are purchased. Additional costs due to structural work or wall repair in order to properly install the door and door hardware can increase the overall cost as well. On average, door contractors charge between $100 - $400 for installation, including door preparation.