How big a unit do I need?
A single standard unit suits one user at a time for a short job. The number that matters is how many people will use it and for how long.
The honest answer depends on the job more than on square footage. A renovation with one worker may need only one unit, a party with many guests needs more, and a building crew needs a count tied to headcount. The provider works from the number of users and the length of the rental.
In a city of narrow lots the physical size matters too. The unit's footprint has to fit the curb space or yard spot with clearance around the door, so the provider asks about width and access, not only the number of people.
Does a porta potty need a permit in San Francisco?
Often yes, when the unit sits on the public right of way. A unit on your own private ground usually does not need the street space permit.
Public Works lists portable toilets by name among the uses the street space permit covers, alongside contractor offices, equipment and debris boxes. The contractor or property owner pulls the permit. A placement beyond the standard footprint needs an additional permit, and the city advises at least 30 days for it.
What changes the price of a single unit?
The quote follows the number of units, the length of the rental, the service visits and how far the unit must be carried. The provider explains the price, and it is approved before work starts.
Unit count and rental length are the largest drivers. A unit for a weekend is a different job from one for several months, and a second unit or an accessible unit changes the quote again. Service visits add to the total, and a unit used by a busy crew needs more of them than one that sits in a garden.
Access matters as much as size. A unit carried up stairs, down a side passage or from a truck parked a long way off takes more labor than one at a level curb, and a gate or a steep grade is part of the quote.
Can a unit go up a hill or a stair access?
Sometimes, but the route matters more than the grade. A unit that cannot be carried to level ground needs a different plan.
Steep streets and stair accesses are the normal case in the city's hill neighborhoods. Filbert Street between Hyde and Leavenworth is listed at 31.5 percent, and the city's own lists rank steep streets differently depending on how the grade is measured. A provider looks at the route from where a truck can stop, the number of steps and whether the unit can be wheeled or has to be carried.
When a unit cannot reach level ground from the stop, the provider may suggest another spot, a different unit or a different approach. The hillside guide covers the access questions in more detail.
What happens to the waste?
The provider carries the waste away under its own registrations and permits, so the homeowner does not handle it.
California's Health and Safety Code requires any business that cleans chemical toilets or disposes of the cleanings to register, and the registration is valid for one calendar year. Counties issue septage pumper permits, and the SFPUC Wastewater Enterprise runs a trucked waste hauler permit that lists portable chemical toilet waste as a category.
The homeowner's part is simpler: keep the spot clear for the truck and the technician, and leave the unit's supplies and contents to the provider.