Step One: Submit Completed Form. A 180-day time extension for obtaining a Compliance Certificate is available when you are buying or selling a property.Gov, with "Request for Soft Story Extension" in the subject line, or. For most projects, fill out the Basic Application for Development Review and other needed forms. Prepare required plans and materials. Fill out the forms and pay the Time Extension Certificate fee. 2. Complete and Sign Time Extension Certificate. You must make a written request to extend or renew the permit. The request must include a schedule for completion of the work. I am requesting an extension of the expiration date of my Building Permit Application, per Section 304 (d) of the Oakland.