Inspections must be requested prior to any work being covered within the walls, ceilings, floors or earth. Some common inspections are the rough-in and air test. For other inspections that may be required, please refer to the permit card. An example Permit Card can be found here.
Gas piping permits sometimes require multiple inspections, including a final inspection. Failure to call for inspections is a violation of the building code and could trigger enforcement action. Inspection records are public information, and are often requested at the point of property sale.