A 4 stall restroom trailer sleeps four people at once, not four total across a weekend, and it's the size most St. Louis event planners land on for 150 to 300 guests. St. Louis Porta Pros stocks these for weddings, office renovations and multi-day festivals across the metro.
Think of it as a step up from a 2 stall restroom trailer and a step below an 8 stall restroom trailer. It's built to move real crowds through fast without the line backing up past the beer tent. St. Louis Porta Pros sets these on gravel lots, asphalt driveways and grass pads all over the city, from Forest Park-adjacent venues to job sites near Kirkwood, 12.5 miles west. Compare it against a bank of standard porta potty rental units if you're not sure which fits your guest count better; our how many porta potties do I need guide breaks that math down. If you want climate control and real sinks instead of basic units, this is where you land before jumping to a luxury restroom trailer rental. Delivery crews need clearance to back the trailer in and level it, similar to what we ask for on a roll-off dumpster rental delivery, so tell us about gates, slopes or low branches when you book through request a quote.
Rental cost depends on how long you need it and where it sits. Multi-day trailer rentals run in a different range than a single-day drop, and event weekends carry their own premium pricing separate from a straight weekly rate. Check full breakdowns on restroom trailer rental cost and general porta potty rental cost pages before you commit.
| Duration | Low | Typical | High |
|---|---|---|---|
| Day | $175 | $800 | $2,500 |
| Week | $150 | $1,397 | $1,650 |
| Weekend | $900 | $2,000 | $3,000 |
| Event | $2,499 | $3,500 | $3,899 |
A wedding weekend near Webster Groves, 8.6 miles southwest of St. Louis, typically books the weekend or event tier rather than the daily rate. Delivery is a separate line item; see porta potty rental per day for how that stacks. If your job runs long, ask about shifting to a monthly porta potty rental structure instead of repeated weekly bookings.
Yes, if you're clustering restroom units for public use, ADA Standards section 213.2 requires that at least 5 percent of clustered single-user units be accessible, with a minimum of one. That standard covers standalone portable toilets more directly than multi-stall trailers, but plenty of St. Louis venues still ask for a compliant ADA accessible porta potty alongside the trailer to cover overflow. ADA Standards section 403.5.1 sets a 36 inch minimum clear route width, and section 404.2.3 sets door openings at 32 inches minimum, both worth checking against your site's path from parking to trailer. Read ADA restroom requirements for the full picture. Construction crews running a 4 stall trailer on-site for staff should also review OSHA 1926.51(c)(1), which sets toilet ratios by headcount starting at one facility for 20 workers or fewer. Pair that with a look at our construction site services page, and confirm placement doesn't block a fire lane the way we flag on porta potty placement guide.
Curious about permits before your event date locks in? St. Louis placement in a public right of way needs confirming with the city; we don't guess at ordinance numbers, so check porta potty permit requirements and talk to the city directly before delivery day.
There's no fixed cap, but four simultaneous users keep lines short for groups of 150 to 300 over an 8 to 10 hour event. Larger guest counts or all-day festivals often pair a 4 stall trailer with backup standard porta potty rental units to prevent bottlenecks.
Most units run on generator or standard outlet power for lighting, climate control and water pumps. Tell St. Louis Porta Pros your site's power access when booking so we bring the right setup, especially for locations without nearby temporary power pole service.
Plan on roughly 60 feet of straight clearance behind the delivery truck, similar to what's needed for a roll-off dumpster rental drop. Narrow driveways or tight alleys in older St. Louis neighborhoods sometimes need a site visit first.
Yes. Weekend pricing sits in its own tier, separate from daily or weekly rates, and covers Friday drop-off through Monday pickup for most bookings. Ask about matching a wedding restroom rental or festival restroom rental package to your date.
A 4 stall unit focuses on functional capacity, while a luxury restroom trailer rental adds finishes like upgraded fixtures and interior design. Both handle similar guest counts; the difference is finish level and price, not stall count.
Yes. St. Louis Porta Pros delivers 4 stall restroom trailer across St. Louis and the surrounding metro, with same-day and next-day drop-off available on most orders.
Pricing depends on the unit and how long you need it. See our cost breakdown and request a free quote for an exact figure.
Standard rentals include scheduled service — a pump-out, a clean, a restock and fresh deodorizer. Busy or hot-weather sites can be serviced more often.
Call now or request a free quote — clean units, on-time delivery, transparent pricing.
