We're not going to put a number here we can't stand behind - the door itself, the opener you pick, insulation level, and whether the existing header and track can be reused versus replaced all move the price, and none of that is something we can price sight unseen. What we can say is that Braselton's median household income runs well above the rest of the Buford service area, and in practice that shows up as more requests for insulated doors with higher R-values and quieter belt-drive openers rather than the base builder package - not because the job itself costs more, but because the upgrade gets chosen more often.
One real limitation: if your existing track and header are in good shape, reusing them keeps the job cheaper and faster. If they're not, we'll tell you before we quote rather than after, since that's the number that moves the estimate the most.