You should have at least one single-stall porta potty rental for every 75 guests for a four-hour event. If your event is twice as long, you will need twice as many restrooms. If you are serving alcohol, add 20% more restrooms. Additionally, your event should have one handwashing station for every four porta potties. Portable sinks or hand sanitizer stations are also required along with your portable toilet rental if your event includes food service.

A good rule of thumb is to have one portable toilet for every 10 workers for a 40-hour work week, and then increase the number of porta potty rentals as your workforce and work hours increase. For 20 workers, you will need two restrooms; 30 workers would need three restrooms, etc. However, if you are staffing for multiple shifts per week, you will need to rent a porta potty for each shift. For example, you'll need two restrooms for 10 day-shift workers and 10 workers on the night shift. Increase at this rate to ensure every 10 workers on each shift gets one porta potty.

If your event is open to the public, you should have at least one ADA-accessible restroom. If your event is large, you need an ADA-compliant portable restroom for every 20 standard portable toilets.

You do not need a permit to set up a porta potty on your own property. However, if you want to set up a restroom on the street in front of your home or on any city block for an event, you will have to contact your city for permission.