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 § 213-32 shall apply.
The following provisions shall apply whenever any improvement
is made to an existing structure located within any identified floodplain
area:
A.
No expansion or enlargement of an existing structure shall be allowed
within any floodway area that would cause any increase in the elevation
of the one-hundred-year flood on adjacent properties.
B.
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. The above activity shall also address the requirements
of the 34 Pa. Code Chapters 401 to 405, as amended, and the 2006 IBC
(Sections 1612.4 and 3403.1.1) and the 2006 IRC (Section R324.1.4).
C.
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.
D.
The requirements of 34 Pa. Code Chapters 401 to 405, as amended,
and the 2006 IBC (Sections 101.3, 3403.1 and Appendix G) or the latest
revision thereof and the 2006 IRC (Sections R102.7.1, R105.3.1 and
Appendixes E and J) or the latest revision thereof shall also be utilized
in conjunction with the provisions of this section.
