Every permit issued shall become invalid unless the work on the site authorized by such permit is commenced within 180 days after its issuance, or if the work authorized on the site by such permit is suspended or abandoned for a period of 180 days after the time the work is commenced. The Building Official is authorized to grant, in writing, one or more extensions of time, for periods not more than 180 days each. The extension shall be requested in writing and justifiable cause demonstrated. No permit shall be extended beyond five years from the date it was issued.

Except for the International Fire Code, permits from codes listed in PCC 17C.10.010, related to the main project building permit, shall expire together with the building permit.