Inside Crawfordsville, permits come from the city's Department of Planning and Building Services, where the Zoning Administrator issues them. The city's permit list names remodels, additions and new construction rather than insulation on its own, so if your insulation is part of a bigger project, or you want to know whether your job needs one, that department is the place to ask, and a permit puts the city's review and inspections on the schedule too. I check which office covers your address before we book anything, and we handle the permit side with that office when your job calls for one. The department also takes contractor registrations online, so it's fair to ask anyone you're thinking of hiring whether they've filed one with the city.
Price here turns on the same things it does in Lafayette or Frankfort: how many inches are already up there, whether the old material is dry and clean or has to come out, how much sealing the attic needs first, and how easy it is to get into. The schedule mostly depends on whether removal comes first and, on permitted work, when the inspections fall. I'll give you your own figure once I've seen the attic.