Originally Posted by
Alton Darty
What I have seen is that the AHJ will often allow a certain percentage of the structure to be rehabbed before having to meet current codes. Say 40% or more of the existing structure would need to be gutted out before current code would have to be met.
Other areas I have seen use a dollar amount, usually also ties in with appraised value of the structure before and after the rehab.
Alton,
What you are referring to is having, or not having, to bring the entire structure up to current code.
Regardless, though, *all new work* must be permitted, done according to code, and inspected as required by code.