In general, revised flood levels will be higher, more properties are likely to be in the updated floodplain. On the other hand, development modifications along with improved topographical data and mapping techniques will show some properties or structures to be removed from the floodplain. When new maps are issued, your risk may have changed along with your flood insurance requirements. Property owners are encouraged to review the updated maps and discuss implications with their insurance agent. If you've been mapped into a high-risk area, you will be required to purchase flood insurance if your mortgage is through a federally regulated or insured lender. It is possible to save money through a process known as grandfathering provided by the National Flood Insurance Program.
If your property is mapped out of a high-risk area, your flood insurance costs will likely decrease.