For a commercial rewire, the permit requirements usually depend on your local building department, the scope of the work, and whether the job changes any life-safety systems or service equipment. In most cases, you need an electrical permit from the local authority having jurisdiction, often the city, county, or township building office. If the rewire is large enough to affect walls, ceilings, exits, or occupancy, you may also need building permits, fire alarm permits, or low-voltage permits in addition to the electrical permit.
If the work involves a new service, a service upgrade, or any change to the meter or utility side, the power company may require a separate service application and inspection approval before they reconnect power. That is not the same thing as the electrical permit, but the two usually have to line up before the project can be energized. On commercial jobs, the utility often wants proof that the service gear was installed correctly and that the local inspector signed off.
You also need to watch for code-related triggers. A full rewire in a commercial space can require updated emergency lighting, exit signs, AFCI or GFCI protection in certain areas, equipment grounding, panel labeling, and sometimes arc-flash or disconnect changes. If the building is being renovated at the same time, the permit package may need drawings stamped by a licensed electrician or engineer, especially when load calculations, service sizing, or tenant improvement plans are involved. In some jurisdictions, any work above a certain value or square footage has to be reviewed as a commercial tenant improvement, not just a simple electrical permit.
The safest move is to ask the local building department exactly what they require for a commercial rewire of your type of space. Give them the square footage, the current use of the building, whether the service is changing, and whether any fire alarm or emergency systems are being touched. A licensed commercial electrician should know the local process and can usually pull the permit for you, schedule inspections, and coordinate with the utility if the power needs to be disconnected.
One practical tip: don’t start demolition until the permit is issued and you know whether rough-in and final inspections are both required. Another is to confirm who is responsible for pulling the permit in writing, since in many places the contractor must do it, not the property owner. Commercial permitting can feel slow, but getting it right up front usually prevents expensive delays later.
