The provisions of this chapter do not require any changes or
improvements to be made to lawfully existing structures. However,
when an improvement is made to any existing structure, the provisions
of § 702 shall apply.
Any modification, alteration, reconstruction, or improvement of any
kind to an existing structure to an extent or amount of 50% or more
of its market value shall constitute a substantial improvement and
shall be undertaken only in full compliance with the provisions of
this chapter.
Within any Floodway Area/District (see § 402, Subsection 1A), no new construction or development shall be allowed, unless the appropriate permit is obtained from the Department of Environmental Protection's regional office.
Any modification, alteration, reconstruction, or improvement of any
kind to an existing structure, to an extent or amount of less than
50% of its market value, shall be elevated and/or floodproofed to
the greatest extent possible.
Any modification, alteration, reconstruction, or improvement of any
kind that meets the definition of "repetitive loss" shall be undertaken
only in full compliance with the provisions of this chapter.