For most commercial properties, the best way to do this is by ordering a “Phase I Environmental Report” (many banks will automatically require this because it affects their collateral). This report will identify if there are any “Recognized Environmental Concerns” (RECs) on the property that you need to worry about. If you neglect to do any environmental due diligence, the liability for any existing environmental contamination on the property could ultimately fall on your shoulders – making it very difficult and expensive to sell the property in the future.
I might add that in some development-friendly communities, the city and developer might try to play the eminent domain (condemnation) card. Ostensibly, eminent domain should be used only in the exercise of public good such as a new highway or road widening, though some cities get away with it in dubious circumstances. Your agent should know whether this could be an issue. Such a scenario, as unlikely as it is, would probably force you to hire a lawyer to get a decent price.
After identifying your likely buyers, try to think like them so you can focus your message to convey what they need to know about your property. Have information ready about schools, shopping and other nearby amenities. For developable land you can be prepared with zoning information and insight from local authorities about the location and capacity of water and sewer service. Each property is different, so customize your information for your situation and your targeted buyers.