Section 14.05.032 (G) of the Mill Valley Municipal Code requires that your first inspection must be scheduled within 180 days of the date the permit was issued, and "successive approvals" must occur every 180 days thereafter. "Successive approval" means the work is inspected and approved within the 180-day period. A typical scenario would be an inspection is requested and performed, a correction list is generated, and the corrections are completed, another inspection is scheduled to verify the corrections, and the next 180-day period begins from the date the corrections were "signed off", and the work in question allowed to be covered.
Upon request, a permit may receive a one-180 day extension. The request for an extension must be in writing and signed by the applicant, addressed to the Building Official, and the reason for the request must be stated.
It's important to note at this juncture that "successive approvals" must be based on "valid" inspection. A valid inspection generally involves completing all possible elements in a phase of the project before applying finishes, or otherwise covering the work. An example of this could be a bathroom remodel. We would not inspect the plumbing, electrical, framing, and mechanical elements separately; we would request that once all these elements were completed, the applicant would call for a "rough all" inspection. This means that all of the work involved is completed and ready to cover with sheetrock or other finishes.
With every permit that is issued, a copy of "Building Inspection FAQs" is included with the permit hard copy. The majority of information necessary for understanding the inspection process is included in this document. The inspection process for larger projects is covered in detail in the "Pre-Construction Meeting" handout. This is usually distributed as part of a project that requires a pre-construction meeting, but a great deal of the information is relevant to the inspection process in general.