Job Site Toilet Rules in California
California's rule is Cal/OSHA Title 8, §1526: a construction job needs at least one toilet for every 20 workers of each sex, kept clean, private and stocked with toilet paper. §1527 adds one washing station per 20 workers, placed so anyone using a toilet can wash. Both rules bind the employer, so on a remodel that is your contractor.
- Rule text quoted from Title 8
- Toilets and handwash stations
- Bay Area, Santa Cruz & Monterey
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What California requires on a job site
Two sections of California's Construction Safety Orders cover it. Title 8, §1526 sets how many toilets a job needs and the standard each one has to meet. Title 8, §1527 sets the handwashing that goes with them. Cal/OSHA enforces both, and both are written for the employer: whoever has workers on the site.
Neither section names a brand or says the toilet has to be a portable unit. Where a flushing toilet is not possible because the site has no sewer or no water supply, §1526(c) calls for toilets that need neither and lists chemical toilets among them. A porta potty is a chemical toilet.
The rule, word for word
“A minimum of one separate toilet facility shall be provided for each 20 employees or fraction thereof of each sex.”
“Toilet facilities shall be kept clean, maintained in good working order, designed and maintained in a manner which will assure privacy and provided with an adequate supply of toilet paper.”
Does a home remodel need a porta potty?
Homeowners ask it in nearly these words: “Is there a residential construction code or rule to require porta potties on a job site?” In California the rule is Title 8, §1526, and it reads the same for a kitchen remodel as for a new subdivision. If your contractor has a crew working at your house, the contractor has to provide a toilet for them. Even “under temporary field conditions,” §1526(b) asks for “not less than one toilet.”
It is a workplace safety rule, not a building code. Your city or county can add its own requirement on top of it, and the building department that issued your permit can tell you if it has one.
The rule does not say the toilet has to be rented. It says one has to be provided, private, clean and stocked. That is why the next question is usually about the bathroom inside the house.
For the units themselves, see our portable restroom rentals and construction porta potty rental pages.
How many toilets a crew needs
§1526(a) counts each sex separately: one toilet for every 20 employees “or fraction thereof,” so the 21st worker in a group means a second toilet. A crew of 18 men and 3 women needs two toilets under the rule.
| Workers of each sex on site | Minimum toilets for that group |
|---|---|
| 1 to 20 | 1 |
| 21 to 40 | 2 |
| 41 to 60 | 3 |
| 61 to 80 | 4 |
Where the count changes
- Fewer than 5 employees. One single-user toilet designated for all-gender use is enough (§1526(a), Exception 1).
- All-gender units count. Each single-user, all-gender toilet counts toward the total when every single-user toilet on site is all-gender, any multi-user toilets are split equally between the sexes, and the total still meets the count (§1526(a), Exception 2). A standard porta potty is a single-user toilet.
- Mobile crews. The section does not apply to mobile crews with readily available transportation to nearby toilets (§1526(e)).
The rule sets a floor, not a comfort level. For a planning count that allows for longer shifts, or for an event headcount, use our unit calculator.
How many porta potties do you need?
Estimate the right unit count for your site or event in seconds, built on Cal-OSHA §1526 and ANSI Z4.3 standards. Then send it over for an exact quote.
Handwashing goes with it
Title 8, §1527 asks for “a minimum of one washing station” for each twenty employees or fraction thereof, “located and arranged so that any time a toilet is used, the user can readily wash.”
One detail catches people out. When the toilet is a chemical unit, §1527 wants the washing station outside it and “not attached to it,” with a sign or similar notice that the water is for washing. The exception is a crew of fewer than 5 with only one toilet, where the sink may sit inside the unit.
Our sinks and handwash stations page covers the stand-alone units that do this job.
What each washing station needs
- Kept clean and sanitary
- Enough water for effective washing
- Soap or another suitable cleansing agent
- Single-use towels or a warm-air blower
- Placed so anyone using a toilet can readily wash
When the house bathroom is off limits
A homeowner in San Bruno put it plainly: they were planning some light remodeling and “wanted to rent a porta potty for our contractors.” Others ask whether, over a 6 to 8 week renovation, the crew should have the run of every bathroom in the house.
§1526 does not settle that for you. It requires a toilet that is provided, private, clean and stocked; it does not say whose. If the bathroom is the room being remodeled, if the water is shut off, or if you would rather keep a crew's boots out of the hallway, a unit in the driveway is how your contractor meets the rule.
You can rent it yourself or leave it to the contractor. Either way, put it where the crew can reach it and a service truck can get to it.
When the site owner says no unit
It happens on commercial jobs too. A subcontractor set a unit next to his work and was told by the developer he could not have one on site. The requirement does not go away when a unit is unwelcome: it sits with each employer that has workers there. Two questions usually sort it out.
Who already supplies toilets?
Ask whether the general contractor or the owner provides toilets the trades can use, and whether there are enough to meet the count in §1526.
Is it the unit, or where it sits?
Placement often settles it: behind the building, along the fence line, or at the edge of the lot, still within reach of the crew.
Questions about a specific site? Call us at (408) 438-7873 or send the details through our contact page.
Sources: California Code of Regulations, Title 8, §1526 Toilets at Construction Jobsites and §1527 Washing Facilities, read on dir.ca.gov on October 6, 2026. This page explains the rule; it is not legal advice.
Need a unit on your job site?
Tell us the crew size and how long the job runs, and we will recommend the unit count and handwashing to match, with the price in writing.