What Comes Inside a 4 Stall Restroom Trailer?
Expect separate stalls, sinks with running water, interior lighting and climate control on most units, a step up from a standard porta potty rental or even a deluxe flushable porta potty. Columbia Porta Pros stocks these alongside 2 stall restroom trailers and 8 stall restroom trailers for bigger crowds. Handwashing meets 29 CFR 1910.141(d)(2), which requires soap and towels or a drying device, not just sanitizer, so we pair units with a proper setup rather than relying on a hand sanitizer station rental alone. If your event needs a wash-only add-on, a handwashing station rental fills the gap. For anyone weighing trailer against traditional stalls, our restroom trailer rental page breaks down the full lineup, and the luxury restroom trailer option adds finishes for upscale bookings. Compare features against a basic portable restroom rental before deciding what your guest count actually needs.
How Much Does a 4 Stall Restroom Trailer Cost in Columbia?
Pricing depends on rental length, distance from Columbia and whether the unit needs full flush plumbing or a holding tank setup.
| Duration | Low | Typical | High |
|---|---|---|---|
| Day | 175 | 800 | 2500 |
| Week | 150 | 1397 | 1650 |
| Weekend | 900 | 2000 | 3000 |
| Event | 2499 | 3500 | 3899 |
A single-day booking sits well below a full week or a multi-day event package, so match the duration to your actual need. See the full restroom trailer rental cost breakdown, or check general porta potty rental cost if you're comparing against standard units. For short jobs, our porta potty rental per day page has more detail, and long builds should look at monthly porta potty rental instead.
How Many Stalls Do I Need for My Event?
OSHA 1926.51(c) sets construction ratios at one toilet facility per 20 workers, with additional seats added as crew size climbs past 20. A 4 stall trailer comfortably covers a crew near that first bracket or a mid-size gathering under a few hundred guests. For weddings and festivals, guest flow through 4 stalls moves faster than a single unit, especially with separate men's and women's sides. Our how many porta potties do i need guide walks through the math for both job sites and events, and the osha portable toilet requirements page covers the ratio table in full. If accessibility matters, ADA Standards 213.2 requires at least one accessible unit in any cluster, so ask about pairing your trailer with an ada accessible porta potty. Delivery crews need clearance to position the trailer, similar to the 60 feet of straight clearance a roll-off truck needs, so flag tight driveways or gated venues when you book. Columbia sites near Forest Acres, 6.9 miles west, or Dentsville, 8.8 miles northwest, are both within normal service range.
Columbia weddings, corporate events and construction jobs all book these trailers, and our event restroom rental and construction site services pages cover setup specifics for each. For weekend celebrations, the wedding restroom rental and festival restroom rental pages go deeper on logistics.
How far in advance should I book a 4 stall restroom trailer?
Book two to four weeks out for weekend events in Columbia, longer during spring and fall wedding season. Construction jobs can often get faster turnaround. Call ahead if your date falls near a major festival weekend when trailers book up across the metro.
Does a 4 stall restroom trailer need a water and power hookup?
Some units run self-contained with onboard tanks, others need a water line and standard outlet nearby. Tell us your site conditions when you request a quote so we bring the right configuration, whether that means fresh water hookup or a fully self-sufficient trailer.
Can I place a restroom trailer on a residential street in Columbia?
Placement in the public right of way needs confirming with the city before delivery. Driveways and private lots are usually simpler. Check our porta potty placement guide and porta potty permit requirements pages before finalizing your site plan.
What is the difference between a 2 stall and 4 stall trailer?
A 2 stall trailer fits smaller gatherings and tighter budgets, while 4 stalls handle higher guest counts without long lines. Compare both directly on the 2 stall restroom trailer and 4-stall page specs before booking.
Do 4 stall restroom trailers include climate control?
Most Columbia Porta Pros trailers include heating and cooling, especially useful given regional heat. Confirm this feature when requesting your quote, since not every unit in every fleet carries the same build.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.