The best place to find out about property zoning restrictions is by contacting the appraiser’s office in the county you want the property. This could be done by a simple Google Search : ” (name of county) (state) appraiser’s office. When you call just say that you are interested in purchasing a vacant lot and you would like to find out the zoning restrictions. Make sure you have the property APN number ( Assessors Parcel Number) to help them locate the vacant lot you have questions about.