Generator Noise Rules: Can I Run a Backup Generator All Night?

Emergency Exemptions Usually Apply

In most cities, noise ordinances include an explicit exemption for "emergency work" or "equipment necessary for health and safety" during declared emergencies or power outages.

This means that while your generator might violate the normal 55 dB nighttime limit, you will not be cited for running it during a blackout. The immediate need for heat and power outweighs the noise regulation.

However, Limits Still Exist

Even during an outage, there are still rules you must follow:

• Routine Testing: You typically cannot run your generator for "maintenance testing" during quiet hours (e.g., 10 PM - 7 AM). Testing is usually restricted to weekdays during the day.
• Permanent Unit Installation: Standby generators (whole-house units) must usually meet specific decibel ratings at the property line to pass zoning inspections when they are installed.
• Placement: You cannot place a portable generator right under your neighbor's bedroom window. Not only is this a noise nuisance, but it is also a deadly carbon monoxide hazard.

Generator Etiquette and Safety

To be a good neighbor during a stressful blackout:

• Position Carefully: Place the unit as far away from neighboring homes as possible.
• Use Barriers: Placing the generator behind a garage, shed, or even a propped-up piece of plywood can deflect a significant amount of sound away from neighbors.
• Turn It Off If Possible: If your house is warm enough, consider turning the generator off late at night to give everyone a few hours of quiet sleep, restarting it in the morning.

The Takeaway

During a power outage, the law is lenient regarding generator noise for safety reasons. However, common sense and courtesy still apply. Positioning your generator thoughtfully ensures that while you stay warm, you aren't making a difficult situation miserable for the people living next door.