No. The law does not permit any expansion towards the water if the structure is already less than the required setback. However, a non-conforming structure that existed on January 1, 1989 may be expanded less than 30% (based on the floor area and volume of the structure), but only to the part of the building that is within the required setback – and, of course, with a permit. Local municipalities may adopt some other alternatives to the 30% rule. See the local ordinance.