In Monterey Park, building permits go through the city's One Stop Building Permit Center, and when a job needs one it has to be issued before our crew starts, so that step often sets the start date. If the city has to review plans first, the permit won't come over the counter, which adds time. Any contractor coming in from another city also needs a Monterey Park business license, even for a short job, so it's fair to ask whoever you hire to show you that and their state license. Before I quote, we check which office covers your address, and when the job calls for a permit we take care of that step with the city before work starts. After that, the price turns on what's already in your attic: whether the old insulation can stay or has to come out, how many gaps need sealing, and how easy the space is to move around in.
Being based in East Los Angeles keeps Monterey Park close to home, and we run the same kind of attic jobs in Pico Rivera and the other cities around us. The schedule depends just as much on the attic as on the permit, because if old material has to be hauled out, that comes before anything new goes in.