How Many People Can a 4 Stall Restroom Trailer Handle?
Four stalls work well for weddings, mid-size festivals and construction crews in the 40 to 100 person range, depending on event length and how much everyone's drinking coffee. For jobsite use, OSHA 1926.51(c) sets the baseline: one toilet for 20 workers or fewer, then one seat plus one urinal per 40 workers as headcount climbs. A construction site services crew running 50 to 60 people often pairs a 4 stall trailer with a couple of standard porta potty units to keep lines short during breaks. For weekend weddings or a backyard reception in Saint Charles, four stalls usually beats renting a stack of portable restroom rental singles, both for flow and for how the space feels. If you're not sure which stall count fits your guest list, the how many porta potties do I need guide walks through the math, and our restroom trailer rental page compares the 2, 4 and 8 stall options side by side.
What Comes Inside a 4 Stall Restroom Trailer?
Expect flushing toilets, sinks with running water and interior lighting, a step up from a deluxe flushable porta potty unit. Handwashing setups on these trailers meet 29 CFR 1910.141(d)(2), which requires soap and towels or a hand dryer, not just sanitizer. Doors typically clear the 32 inch minimum called out in ADA Standards section 404.2.3, though a 4 stall unit is not automatically an ADA-compliant trailer. If you need one accessible stall, ask up front, since ADA Standards section 213.2 requires at least 5 percent of clustered toilet units be accessible whenever units are grouped for an event. We also rent standalone ADA accessible porta potty units to pair alongside a trailer when full compliance matters, and our luxury restroom trailer line goes further with climate control and finished interiors for weddings and corporate events.
Where Can a 4 Stall Restroom Trailer Be Placed in Saint Charles?
Placement comes down to level ground, a nearby power source and truck access for delivery and pump-outs. A roll-off or trailer delivery generally needs about 60 feet of straight clearance behind the truck, so tight driveways or alley setups in older Saint Charles neighborhoods sometimes need a walkthrough first. Our porta potty placement guide covers ground surface and clearance in more depth. If the event sits in the public right of way, downtown sidewalk or a city park, placement needs confirming with the City of Saint Charles before delivery day; we do not guess at permit rules we haven't verified. For jobsites already running temporary fence rental or a light tower rental, we coordinate trailer placement with the rest of the site layout in one visit. Events near St. Peters, 6.9 miles west, or Maryland Heights, 9.4 miles southeast, fall inside our regular delivery loop as well, and our service areas page lists the full coverage map.
How much does a 4 stall restroom trailer cost to rent?
Comparable restroom trailers run 150 to 1650 dollars for a week's rental, with day rates and full event packages priced separately depending on trailer finish and length of use. Delivery is billed separately. See restroom trailer rental cost for a full breakdown by duration.
Does a 4 stall trailer need a generator?
Some sites have power on hand, others don't. If your site lacks a reliable outlet, ask about pairing a temporary power pole with delivery so lighting and pumps run without interruption for the full rental period.
Can I upgrade from 4 stalls to 8 later?
Yes, if you expect guest count to grow, tell us before delivery. Compare stall counts on the 8 stall restroom trailer and 2 stall restroom trailer pages so you're not stuck mid-event with a short queue.
Is a shower trailer different from a restroom trailer?
Yes, a shower trailer adds stalls built for bathing, common on disaster relief jobs or multi-day events. See shower trailer rental if your Saint Charles job needs both washing and restroom facilities on site.
How far in advance should I book?
Book as soon as your date is set, especially for spring and fall weekends when wedding restroom rental and event restroom rental demand peaks around Saint Charles. Request a quote early through our contact page to lock in delivery.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.