How many units do you actually need?
Start with people, not guesswork. OSHA 1926.51(c) sets construction site ratios: 1 toilet for 20 workers or fewer, then 1 toilet and 1 urinal per 40 workers once you pass 20, and per 50 workers at 200 or more. For a wedding or a block party in Castro Valley, the math runs differently, and our how many porta potties do I need guide walks through headcount by event type. Farms hiring hand-labor crews fall under a separate rule, 1928.110, which asks for one facility per 20 employees within a quarter mile walk. If you are staffing a job site rather than a party, read OSHA portable toilet requirements before you order, because undercounting is the single most common reason a delivery gets a change order the next morning. A standard porta potty rental with a 60 to 70 gallon tank covers most short jobs; longer ones need a service schedule, not just more units.
Where should the unit go?
Pick flat, stable ground with a clear path from the street. A standard unit runs about 44 by 48 inches on the ground and stands 92 inches tall, so the footprint is smaller than most people picture, but the delivery truck still needs room to maneuver. Our porta potty placement guide covers surface and slope in more detail. If you need a roll-off dumpster on the same site, plan for about 60 feet of straight clearance behind the truck for that drop, which usually decides whether the toilet and the dumpster can share a driveway or need separate spots. Placement in the public right of way needs confirming with the City of Castro Valley before delivery day; we do not assume a curb or sidewalk placement is allowed without that check. For jobs near Fairview, 3.3 miles southeast, or Cherryland, 4.4 miles southwest, the same placement rules apply, and our service areas page covers both.
Do you need an ADA unit?
If units are clustered for public use, yes, at least one has to be accessible. ADA Standards section 213.2 requires that at least 5 percent of clustered single-user units be accessible, and never fewer than one. An ADA accessible porta potty needs a 60 inch turning circle inside per section 304.3.1, a door opening of at least 32 inches per section 404.2.3, and a stable, slip-resistant surface leading to it per section 302.1. Ramp slope, if one is needed to reach the unit, cannot exceed 1:12 under section 405.2. Weddings and county fairs both trigger this rule the moment more than one unit is on site for guests. Check our ADA restroom requirements page before finalizing a headcount-based order, and price it against a standard unit using porta potty rental cost so the accessible unit is not an afterthought in the budget.
What else belongs on the checklist?
Handwashing, service frequency and cleanup all need a line item. General sanitation for crews falls under 1926.51(c), but if anyone on site is applying paints, coatings, herbicides or insecticides, washing facilities are required specifically under 1926.51(f)(1). A handwashing station rental or portable sink rental has to carry soap and a way to dry hands, since 29 CFR 1910.141(d)(2) is clear that hand sanitizer alone does not satisfy the requirement. ANSI/PSAI Z4.3 sets the baseline service interval at once a week for up to 10 users over a 40 hour week, so a bigger crew or event needs more frequent pumping, not a bigger tank. If the event runs longer than a weekend, a monthly porta potty rental usually pencils out cheaper than repeat weekend bookings. Add a temporary fence rental around the unit cluster for crowd control at fairs or races, and check dumpster permit requirements if debris removal is part of the same job.
| unit | day | week | month |
|---|---|---|---|
| standard | $100-$350 | $130-$500 | $125-$325 |
| ada | $200-$400 | $240-$400 | n/a |
| deluxe | $85-$1200 | $150-$290 | n/a |
A weekend rental for a standard unit typically runs $125 to $400, which suits a one-off event better than a week-long booking. For construction jobs running past a month, compare against a porta potty rental per day rate first, since day rates sometimes beat a short-week booking for a two or three day job. Castro Valley crews working near Ashland, 4.7 miles west, or Norris Canyon, 7.8 miles northeast, fall under the same delivery zone, so distance rarely changes the quote much inside that radius.
How far ahead should I book?
Book 1 to 2 weeks out for a standard job, longer for weddings or festivals where an event restroom rental or wedding restroom rental needs an ADA unit and a specific delivery window. Emergency same-day delivery is sometimes possible; ask when you call.
Do I need a permit for a porta potty in Castro Valley?
Sometimes, mainly for right-of-way placement. Confirm with the City of Castro Valley before delivery. See our porta potty permit requirements page, and do not assume driveway or private lot placement needs the same review as a curb spot.
How often does the unit get serviced?
Once weekly is the baseline under ANSI/PSAI Z4.3 for up to 10 users over a 40 hour week. Higher headcounts or multi-day events need more frequent pumping; ask about a custom schedule when you book.
What is the difference between standard and deluxe units?
A standard porta potty rental is a basic non-flush unit with a 60 to 70 gallon tank. A deluxe flushable porta potty adds a flush mechanism and better interior finish, priced higher per day.
Can I get a restroom trailer instead?
Yes. A restroom trailer rental works for weddings, corporate events or long job sites needing multiple stalls. Compare stall counts on our 2 stall and 4 stall pages before booking.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.