For a standard screen door with no complications, most contractors can do the job in less than an hour. However, the contractor may charge you for a minimum of one hour of work. Make sure you clarify how the charges will work before the job starts.
Typically, a screen door installation cost is less than $150. However, if the door frame is rotted or needs other repairs before installation can begin, your project cost could exceed $150, depending on the complexity.
When hiring a pro to install both doors, you can potentially save some money on installation. The installer will have all of the necessary tools in place, so the labor costs of installing two doors at once should be less than installing a screen door now and an interior door later.