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 §
183-31 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/district
that would cause any increase in the base flood elevation.
B. No expansion or enlargement of
an existing structure shall be allowed within AE Area/District without
floodway that would, together with all other existing and anticipated
development, increase the base flood elevation more than one foot
at any point.
C. 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.
D. The above activity shall also
address the requirements of the 34 Pa. Code, as amended, and the 2009
International Building Code and the 2009 International Residential
Code.