How Many Porta Potties Do I Need for a Construction Site?
Start with the OSHA table and build from there. OSHA 1926.51(c)(1) requires 1 toilet facility for 20 workers or fewer, then 1 toilet seat and 1 urinal per 40 workers once you pass 20, and 1 seat and 1 urinal per 50 workers at 200 or more. A crew of 15 in Aurora needs one standard porta potty rental. A crew of 35 needs two units under the 40-worker bracket. At 75 workers you are into the next bracket and need to add a unit again. Multi-shift jobs add wear fast, so pair your count with more frequent service instead of just adding units. If your trades include painting, coating, or pesticide work, OSHA 1926.51(f)(1) requires washing facilities for employees applying paints, coatings, herbicides or insecticides, separate from your toilet count. A handwashing station rental covers that requirement. For full guidance on the bracket math, see OSHA portable toilet requirements, and price it out on the construction site services page.
| Workers | Toilets Required |
|---|---|
| 1-20 | 1 |
| 21-40 | 2 |
| 41-60 | 3 (adds 1 urinal at 40) |
| 61-80 | 4 |
| 200+ | 1 per 50 |
How Many Porta Potties Do I Need for an Event?
Events run on guest count and hours, not worker brackets. A rough rule that holds up across most gatherings: 1 unit per 50 guests for the first 4 hours, then add capacity for every additional 2 hours beyond that. Alcohol changes the math. Add 25 percent more units if beer or wine is being served, since bathroom trips run more frequent and longer. Multi-day festivals need daily servicing built into the quote, not a single drop and pickup. A 300 person outdoor wedding in Aurora running 6 hours with a bar should plan for 7 to 8 standard units plus at least one ADA accessible porta potty. Smaller backyard parties can often get by with a single deluxe flushable porta potty unit. Check event restroom rental or the more specific wedding restroom rental page for setups sized to guest lists.
| Guests | Hours | Units |
|---|---|---|
| 50 | 4 | 1 |
| 100 | 4 | 2 |
| 150 | 6 | 3-4 |
| 300 | 6 | 6-7 |
| 300 (with alcohol) | 6 | 7-8 |
What Happens If I Have Fewer Than 20 Workers?
One unit covers you under OSHA 1926.51(c)(1) as long as the crew stays at 20 or fewer. That does not mean skip service. ANSI/PSAI Z4.3 sets the baseline service interval at once per week for up to 10 users over a 40 hour week, so a 15-person crew running full weeks needs that unit serviced on schedule, not left until it is full. Small residential jobs in Aurora, like additions or garage builds, usually sit in this bracket. A home renovation porta potty rental for a single-family remodel is a good fit here. If the crew works odd hours or the site sits far from the road, ask about porta potty placement guide before delivery, since placement affects service access as much as headcount.
Do I Need an ADA Accessible Unit?
Almost always, yes, if the public or a mixed crew will use the units. ADA Standards section 213.2 requires that where single-user portable toilet units are clustered, at least 5 percent must be accessible, and never fewer than one unit regardless of cluster size. That means a job site with 3 standard units still needs 1 ADA unit. The ADA unit needs a 60 inch diameter turning circle per section 304.3.1, a door opening of at least 32 inches per section 404.2.3, and a stable, slip-resistant surface underneath it per section 302.1. Public events in Aurora, especially anything drawing families or older guests, should treat the ADA unit as non-negotiable rather than optional. See ADA restroom requirements for the full spec list and ADA accessible porta potty for what is available to rent.
How Long Should I Rent For?
Match the rental term to the job length, not the other way around. A one-day cleanup or small pour might only need a single day at $100 to $350 for a standard unit. A week-long framing job runs $130 to $500 for the week. A month-long build sits between $125 and $325 monthly. Weekend events land differently again, typically $125 to $400 for the weekend. Longer terms always cost more in total, never less, so do not expect a month to undercut a week on a per-day basis. Full breakdowns live on porta potty rental cost, porta potty rental per day, and monthly porta potty rental.
| Duration | Low | Typical | High |
|---|---|---|---|
| Day | $100 | $150 | $350 |
| Week | $130 | $200 | $500 |
| Weekend | $125 | $250 | $400 |
| Month | $125 | $200 | $325 |
What About Dumpster Size for a Job That Needs Both?
Sites that need toilets almost always need debris removal too. A 10 yard dumpster measures roughly 12 feet long, 8 feet wide, and 3.5 feet high, which works out to about 480 cubic feet, and suits small cleanups or single-room remodels. A 20 yard dumpster runs about 22 feet long by 8 feet wide by 4.5 feet high, close to 800 cubic feet, and typically holds around 2 to 3 tons of mixed debris, right for roofing tear-offs or multi-room gut jobs. A 30 yard dumpster stretches to around 20 feet by 8 feet by 6 feet, holding roughly 30 tons in volume terms but typically rated for 3 to 4 tons of weight depending on material, and fits home additions or commercial cleanouts. A 40 yard dumpster is the largest standard size, around 22 feet by 8 feet by 7 feet, and handles heavier loads up to 4 to 5 tons for large-scale demo work. Pull actual pricing and specs from dumpster sizes and dimensions, 30 yard dumpster rental, or 40 yard dumpster rental, and confirm placement needs about 60 feet of straight clearance behind the delivery truck.
Do I Need Extra Units for Multi-Day or Alcohol-Served Events?
Yes, plan for both separately. Multi-day festivals need daily servicing scheduled in advance, not a single delivery and pickup at the end, because tank capacity on a standard unit sits at 60 to 70 gallons and fills faster with three-day traffic than with one afternoon of use. Alcohol service pushes usage up across the board, so the 25 percent bump mentioned earlier applies on top of your base headcount count, not instead of it. A county fair or multi-day concert in Aurora should budget for service trucks returning daily, similar to what is outlined on festival restroom rental and concert restroom rental. If the event runs into evening hours, pair units with a light tower rental so the restroom area stays visible and safe after dark.
How many porta potties do I need for 100 people?
Plan for 2 standard units if the event runs about 4 hours, following the 1-per-50-guests rule. Add a third if alcohol is served or the event stretches past 6 hours. Always include at least 1 ADA unit per ADA Standards section 213.2, even at this smaller headcount.
How many tons does a 30 yard dumpster hold?
A 30 yard dumpster typically handles around 3 to 4 tons of mixed debris, though the exact weight limit depends on material density. Concrete and shingles weigh more per cubic foot than general construction waste, so check dumpster weight limits before loading heavy material.
How many cubic feet are in a 10 yard dumpster?
A 10 yard dumpster holds about 480 cubic feet, based on typical dimensions of 12 feet long, 8 feet wide, and 3.5 feet high. That size fits small cleanouts, single-room remodels, or a weekend of yard debris removal.
How many feet is a 20 yard dumpster?
A 20 yard dumpster runs about 22 feet long, 8 feet wide, and 4.5 feet high. Exact dimensions vary slightly between manufacturers, so confirm measurements against your driveway or street clearance before booking.
What is the OSHA requirement for portable toilets on a job site?
OSHA 1926.51(c)(1) requires 1 toilet for 20 or fewer workers, scaling to 1 seat and 1 urinal per 40 workers, then per 50 workers at 200 or more employees. Crews doing paint, coating, or pesticide work also need separate washing facilities under 1926.51(f)(1).
Should I rent an extra unit as backup?
For events over 150 guests or job sites running multiple shifts, yes, one extra unit reduces wait times and covers a unit going down mid-event. It costs less than a same-day emergency swap, and emergency porta potty rental exists for the times you skip that step.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.