Goose Creek issues its own building permits through the city's Administration department, which also handles the city's business licenses, so that's the office to ask if you want to check on a company before it works on your house. The city's permit list names electrical upgrades and contractor roofing work and doesn't mention insulation, so I don't guess. Before we schedule, I check what the city asks for at your address, and if your job needs a permit, we take care of it before we start, which makes the city's review part of your start date.
What moves the price is what's already in the attic: how many inches are up there, whether old material has to come out first, and how many gaps need sealing. The schedule turns on the same things, since removal adds a step before anything new goes down, and I'll tell you which of those your house needs once I've seen it. We do the same work in Hanahan and across the cities around North Charleston, and if yours isn't listed, call and ask.