The Flood Insurance Rate Maps (FIRM) Maps were first developed based upon the National Geodetic Vertical Datum of 1929 or NGVD 29. However the most recent maps use the more current (and accurate) datum which is the North American Vertical Datum of 1988 (NAVD 88). The Town of Jupiter has a flood program in place in compliance with the NFIP and thus new construction or substantial improvement of a property in a flood zone must comply with the town flood plan set to this NAVD 88 datum.
If you have an old building plan, survey or flood certificate then it probably shows the finished floor elevation (FF EL. = XXX) according to the NGVD 29 datum.
