If the application is complete and all prerequisite approvals have been obtained, no more than 30 days. The nature of the work proposed will impact the length of time to process the application. A re-roofing or vinyl siding permit can be generally be issued the same day or within a day or two. A new dwelling generally takes a week to ten days. A large commercial or industrial building could take a month. These estimates will vary based upon the level of permit activity, which fluctuates seasonally.