There are many things to consider when estimating the cost of a commercial, i.e., land costs, materials, square footage of the project, etc. The land costs alone can be as much as 70% of the cost. A simplistic plan can run as little as $100 per square foot. Mid-range costs can run $160-$170 per square foot and a project with specialty equipment can run as much as $200 per square foot. For a more accurate estimation consult with your architect.