Porta Potty Rental for a Construction Site
On a job site the number is not a guideline. 29 CFR 1926.51(c) sets it, and the placement decides whether it costs you time.
How many porta potties a construction site needs
This one is set by law rather than guidance. 29 CFR 1926.51(c)(1) requires one toilet up to 20 workers, then one seat and one urinal per 40, and per 50 above 200. For 50 workers that is 2, and it is a floor rather than a target.
The regulation counts workers on site, not workers on the payroll, and subcontractors count. A site that runs 20 in the morning and 60 during a pour is sized for 60.
What a construction site costs to cover
A standard portable toilet runs $110 to $170 a month, measured from the 17 companies who publish a rate for one (median $140), rather than the number the trade repeats without checking.
Weekly is the default and it is most of the cost. Summer heat, a crew larger than the unit is rated for, or a site with no other facilities all argue for twice weekly, and it is cheaper to schedule that than to call it in. What each unit type really costs, measured from 1,976 operator websites.
Which units a construction site wants
Standard units, serviced weekly, sited near where the work is rather than banked at the gate. Long-term rentals are priced by the month and the servicing is most of what you pay.
- Standard portable toilet 87% of companies
- Hand-wash station 55% of companies
- ADA accessible unit 55% of companies
Where to put them
Put them where the trades are, then move them as the work moves. A unit at the gate on a large plot is a unit nobody uses, and a unit the vacuum truck cannot reach is one that does not get serviced. Keep a clear route for the truck and keep the unit off the crane’s swing.
When to book
Standard units are the one thing yards hold in quantity, so lead time is short outside spring. Longer notice matters for the first delivery on a phased job, when nobody has yet agreed where the truck comes in.
Construction site: what catches people out
Walking time costs more than the second unit. A crew crossing a large plot twice a day loses more in labor than the extra rental.
OSHA also requires hand-washing where the work involves anything a worker should not carry home on their hands, and inspectors do look at the condition of the units rather than only the count. Winter sites need the servicing schedule agreed up front, because a unit that freezes is out of service until it thaws whatever the contract says. On a long job, ask what happens to the rate after the first month; long-term pricing is normal and rarely volunteered.
What to ask the company
What is the service interval, does it change in summer or winter, and will you reposition units as the work moves? Take the answers down. Two yards quoting the same number for different service intervals are not quoting the same job.
Find companies who cover a construction site near you
Construction site work goes to yards that already own the right units. 1,714 of the independents we list rent standard portable toilets. Free to use, and nobody can buy their way up the list.