I am not sure my vacant lot is buildable since a septic tank is required. What is the basis for receiving a lower assessment from the Assessor?

The property owner must present sufficient and credible evidence to establish that the lot is not buildable. The Assessor will accept an official finding from DHEC (Dept. of Health and Environmental Control) since this is the State agency authorized to and charged with the responsibility to promulgate regulations relating to septic tank systems.