How do I request an extension of my permit?
To request an extension of your building permit, write a letter to Joe Kirkpatrick, Chief Building Official. 

Include your permit or plan check number, project address and reason for your request.  Submit your letter via U.S. Mail addressed to: City of Irvine, P. O. BOX 19575, Irvine, CA 92623-9575.  You may also submit your letter via fax at 949-724-6402.