Robert11 wrote:

Hello:

Would like to get some idea of what a "reasonable" cost would
be before contacting any contractors.

Job would entail replacing an old 120 amp FPE circuit breaker box with a new
200 amp,
probably Square D, one. To include about 20 or so new breakers, etc.

Thanks,
B.

Depends on too much to tell w/ any accuracy at all--starting with
whether your outside service is up to the higher supply rating.