In Montebello, permits come from the city's Building and Safety Division, and the division asks you to contact it before starting any project to learn whether approvals, permits and inspections apply. Its list names building, electrical, plumbing, mechanical and grading permits but not insulation by name, so the division decides that for your job, and we don't guess. When a job calls for a permit, we take care of that step with the division before work starts, so plan on it ahead of the crew's start date. Ask any contractor you're considering for their California state license. We're licensed and insured.
We're based next door in East Los Angeles, so getting to a Montebello house for an estimate or a second look is easy. We do the same attic work in Downey and the other cities around here. The price moves with how much old insulation has to come out, how many gaps need sealing, how tight the attic is to move around in and which material goes in. The schedule mostly turns on removal and any permit step. At the estimate I write down what your job needs and what has to come first.