Standard porta potty
$125 to $250 a weekend
How many porta potties do I need for a construction site?
OSHA 1926.51(c) sets the baseline: 1 toilet seat for 20 workers or fewer, 1 seat plus 1 urinal per 40 workers once you pass 20, and 1 seat plus 1 urinal per 50 workers at 200 or more. A 15-person framing crew in Rochester needs one standard unit, full stop. A 60-person site crosses into the 40-worker bracket and needs two seats plus urinals. Bigger commercial jobs near construction site services often add a handwashing station rental too, since OSHA 1926.51(a)(1) requires potable water at the site regardless of crew size. If painting, coating or pesticide work is part of the scope, OSHA 1926.51(f)(1) kicks in and washing facilities become mandatory for that crew, not just a nice extra. Check the standard porta potty rental page for unit specs, and use the how many porta potties calculator guide style breakdown before you order. Most Rochester contractors round up rather than down, since a shut-down site over a missing toilet costs more than a spare unit.
How many porta potties do I need for an event?
Events run on hours and drink service, not just headcount. A safe starting ratio is 1 unit per 50 people for a 4 hour event with no alcohol; add units as either number climbs. A 200-guest backyard wedding in Rochester for 4 hours lands around 4 standard units, maybe one ADA accessible porta potty per ADA Standards 213.2, which requires at least 5 percent of clustered units to be accessible. Push the same 200 guests to 8 hours with an open bar and you are closer to 6 to 8 units, because alcohol increases both frequency and urgency. Multi-day festivals compound this fast: a 3-day run needs the day-one count sustained across each day, plus a servicing plan, not a one-time drop. See event restroom rental and festival restroom rental for setups scaled to headcount, and wedding restroom rental if a deluxe flushable porta potty fits the venue better than a standard unit.
Event Restroom Ratios by Headcount and Hours
| Guests | Event length | No alcohol | With alcohol |
|---|---|---|---|
| 50 | 4 hours | 1 unit | 2 units |
| 100 | 4 hours | 2 units | 3 units |
| 200 | 4 hours | 4 units | 5-6 units |
| 200 | 8 hours | 5-6 units | 6-8 units |
| 500 | 8 hours | 10-12 units | 14-16 units |
What does the OSHA jobsite table actually require?
OSHA 1926.51(c) breaks into three brackets: 20 workers or fewer gets 1 toilet seat, 20 to 199 workers gets 1 seat and 1 urinal per 40 workers, and 200 or more workers gets 1 seat and 1 urinal per 50 workers. A 35-person crew falls in the middle bracket and needs 1 seat plus 1 urinal, since it is under the 40-worker threshold but past the 20-worker cutoff. This is separate from general industry rules under OSHA 1910.141(c)(1)(i), which applies to shops and offices, not active construction. Farm crews doing hand labor fall under OSHA 1928.110 instead, which requires one facility per 20 employees within a quarter mile walk. Rochester contractors bidding jobs in Henrietta, 9.3 miles south, or Perinton, 13.9 miles southeast, still fall under the same federal standard regardless of township, since OSHA rules do not change at a municipal line. Pair unit counts with the OSHA portable toilet requirements page for a full breakdown by bracket.
OSHA 1926.51(c) Bracket Table
| Crew size | Seats required | Urinals required |
|---|---|---|
| 1-20 | 1 | 0 |
| 21-199 (per 40 workers) | 1 per 40 | 1 per 40 |
| 200+ (per 50 workers) | 1 per 50 | 1 per 50 |
Does a multi-day job change the count?
No, the ratio stays the same, but servicing frequency has to keep up. ANSI/PSAI Z4.3 sets a baseline of one service visit per week for up to 10 users across a 40 hour week, so a 20-person crew running two units for a month needs weekly service at minimum, more if the pace of use is heavy. A 5-day residential remodel might only need one standard porta potty rental with no mid-week service, while a 3-month commercial build in Brighton, 5.3 miles southeast of Rochester, needs a servicing schedule built into the contract from day one. Longer rentals also shift the pricing structure, since a monthly porta potty rental rate differs from a porta potty rental per day rate, and the math only works if you are ordering for the full duration, not just the delivery day. Check porta potty rental cost for how duration affects the total.
Should alcohol change my unit count?
Yes, plan for roughly 25 to 50 percent more capacity when alcohol is served, since bathroom trips increase in frequency and duration. A 200-guest event that needs 4 units dry might need 5 to 6 with a full bar running for 8 hours. This is less about OSHA, which does not address event alcohol service, and more about avoiding lines that back up past the tent at a Rochester wedding or graduation party. If the venue calls for a nicer setup than a standard bank of units, look at luxury restroom trailer or 2 stall restroom trailer options, which handle higher throughput per unit than a standalone toilet. Golf outings and fairs see similar spikes; see golf tournament restrooms and county fair restrooms for headcount-driven examples close to what a Rochester organizer would plan for.
What if I am renting a dumpster alongside my toilets?
Dumpster sizing follows the same logic as toilets: match capacity to the job, not the calendar. A 10 yard dumpster holds about 10 cubic yards, which answers how many cubic feet in a 10 yard dumpster at roughly 270 cubic feet, and answers how many feet is a 10 yard dumpster at about 12 feet long on most lots. A 20 yard dumpster holds close to 540 cubic feet and answers how many tons does a 20 yard dumpster hold at typically 2 to 3 tons of debris, running around 22 feet long. A 30 yard dumpster holds around 810 cubic feet and answers how many tons can a 30 yard dumpster hold at roughly 3 to 4 tons depending on material density, while a 40 yard dumpster answers how many cubic feet in a 40 yard dumpster at close to 1,080 cubic feet and how many tons does a 40 yard dumpster hold at 4 to 5 tons on heavier loads. Concrete and shingles hit weight limits before they hit volume limits, so check dumpster weight limits before booking a size based on cubic feet alone. Full sizing detail lives on dumpster sizes and dimensions, and a roll-off dumpster rental delivery needs about 60 feet of straight clearance behind the truck to place the box, which matters on tight Rochester lots. See construction dumpster rental for jobsite pairing with toilet counts, and what cannot go in a dumpster before you load anything questionable.
Worked Examples
A 45-person commercial build in Rochester falls into the 21-199 bracket under OSHA 1926.51(c): 1 seat and 1 urinal per 40 workers means two of each once the crew tops 40, so this site needs 2 seats and 2 urinals minimum, likely delivered as portable toilet rental units with weekly service under the ANSI/PSAI Z4.3 baseline.
A 300-guest outdoor wedding near Irondequoit, 4.8 miles northeast of Rochester, running 6 hours with a full bar, starts at roughly 1 unit per 50 guests for 6 dry, then adds 25 to 50 percent for alcohol, landing around 8 to 9 units plus at least one accessible unit under ADA Standards 213.2. A 4 stall restroom trailer often covers this more cleanly than loose standalone units, and pairs well with a portable sink rental near the catering tent.
How many porta potties do I need for 100 people?
For a 4 hour event with no alcohol, plan on 2 standard units. Add a third if the event runs past 6 hours or alcohol is served, and consider one ADA-compliant unit per ADA Standards 213.2 if the venue expects mobility-impaired guests.
How many tons does a 30 yard dumpster hold?
A 30 yard dumpster typically carries 3 to 4 tons, depending on material density. Concrete and dirt hit weight limits fast, while bulky light debris like furniture rarely reaches the ton limit before filling the box. Check dumpster rental cost for how weight affects price.
How many cubic feet are in a 20 yard dumpster?
A 20 yard dumpster holds around 540 cubic feet, or 20 cubic yards, and runs about 22 feet long on a standard lot. That volume handles a mid-size kitchen demo or a roofing job on an average Rochester single-family home.
What is the OSHA requirement for a 15-person crew?
Under OSHA 1926.51(c), a crew of 20 or fewer needs 1 toilet seat. No urinal is required at this bracket. Once the crew grows past 20, the ratio shifts to 1 seat and 1 urinal per 40 workers.
Do I need an ADA unit for my event?
Yes, if you are clustering multiple standalone units, ADA Standards 213.2 requires at least 5 percent to be accessible, with a minimum of one regardless of total count. A single unit event still needs to consider access even without a strict cluster rule.
How many porta potties do I need for a month-long construction job?
The OSHA 1926.51(c) bracket count does not change for a longer rental, but servicing frequency does. Weekly service under the ANSI/PSAI Z4.3 baseline keeps pace with a 20-person crew running two units across a full month.
What we rent
Four units cover almost every job
Typical Rochester ranges, not a quote. Delivery is $50 to $150 and a weekly service visit $30 to $60. See the full cost breakdown.
Deluxe flushing
$200 to $350 a weekend
ADA accessible
$199 to $300 a weekend
Restroom trailer
Quoted by stall count
The rest of the yard
One mobilisation, not three
Roll off dumpsters10, 20, 30 and 40 yardTemporary fencingPanels 6 feet by 12 feetStorage containers20 foot and 40 footHandwashing stationsSinks and sanitiser standsSeptic and grease trapsPumping, cleaning, emergenciesSite power and lightLight towers, temporary poles
We deliver across Monroe County and the surrounding metro:
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