Permits become expired and invalid if the work is not commenced within 12 months after its issuance.  Permits also expire if the work authorized on the site by the permit is suspended or abandoned for a period of 12 months.

 The building official is authorized to grant, in writing, a 180-day extension.  The extension shall be requested in writing and justifiable cause demonstrated.

Applications for which no permit is issued within 180 days from date of application shall be void or withdrawn.