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1) Yes, local municipalities will require an electrical permit prior to the start of any electrical construction. An inspection will also be required.
2) Most municipalities will only provide electrical permits to a licensed, bonded & insured electrical contractor. However, some have been known to allow a homeowner to perform a panel upgrade. I recommend to contact the local electrical inspector to find out the specific requirement in your area. Local electrical codes will always take precedence over the National Electrical Code (NEC).
3) Electrical permit fees typically average around $75. Some municipalities may charge a little more.
4) I also recommend that you contact the local electrical inspector and ask them if any special requirements will be required due to any local electrical codes. It is common practice that many municipalities will require AFCI circuit breakers when upgrading the panel. Some municipalities will also request that inter-communicated smoke alarms be installed in the home as well as carbon monoxide alarms.
5) A 100 amp service into a single family dwelling is minimum. Typical panel upgrade prices performed by a licensed electrician will range between $1500 to $2500. Pricing is dependent upon your location as well as if the existing electrical service is overhead or underground and if upgrading service to 100 or 200 amps or maintaining an existing 100 or 200 amp service. Arc Fault Circuit breakers can also increase the panel upgrade cost. If hiring a licensed electrical contractor, I recommend to obtain (3) three firm price quotes.
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