Do I need a building permit? How do I apply for a permit?

The 2012 International Building Code (IBC) requires that "any owner or authorized agent who intends to construct, enlarge, alter, repair, move, demolish, or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any electrical, gas, mechanical or plumbing system, the installation of which is regulated by this code, or to cause any such work to be done, shall first make application to the building official and obtain the required permit."(2012 IBC)

Click Here for the step-by-step process.