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How Many People Can a 4 Stall Restroom Trailer Handle?
Four stalls comfortably serves a mid-size crowd over a single event day, and most planners pair this size with 150 to 300 guests. If your count runs higher, step up to an 8 stall restroom trailer instead of overloading four units. Charleston Porta Pros bases the recommendation on flow rate, not just headcount, since long ceremonies or all-day festivals push more bathroom trips per guest than a quick backyard party. For construction crews, OSHA 1926.51(c)(1) sets toilet ratios by worker count, so a 4 stall unit can cover a crew near the 20-worker threshold before a second facility is required. Unsure where your event lands? The porta potty placement guide and our how many porta potties do I need page both walk through counts before you commit to a trailer size.
What Does a 4 Stall Restroom Trailer Cost in Charleston?
| Duration | Low | Typical | High |
|---|---|---|---|
| Day | $175 | $800 | $2,500 |
| Week | $150 | $1,397 | $1,650 |
| Event flat rate | $2,499 | $3,500 | $3,899 |
Pricing swings on trip distance, rental length and whether you want a standard or luxury restroom trailer. A weekend wedding near downtown Charleston runs differently than a weeklong job site rental out toward Goose Creek, 14.1 miles north. Delivery fees for trailers are quoted separately from the trailer itself, and our restroom trailer rental cost page breaks that down further. If four stalls is more than you need, compare against a 2 stall restroom trailer or check general porta potty rental cost figures before deciding. Charleston Porta Pros also rents shower trailers alongside restroom units for multi-day outdoor events.
Where Can I Place a 4 Stall Restroom Trailer on My Property?
Placement needs a level pad and enough clearance for the delivery truck to back in and level the trailer, similar to the roughly 60 feet of straight clearance a roll-off truck needs for a roll-off dumpster rental delivery. Charleston Porta Pros checks ground stability and slope before confirming a spot, since a trailer sitting unevenly causes plumbing problems fast. If the unit needs to sit in a public right of way, that placement needs confirming with the City of Charleston before delivery day, since local right-of-way rules were not verified for this page. For ADA guests, an accessible route needs a minimum 36 inch clear width under ADA Standards 403.5.1, and if you are running single-unit portable toilets alongside the trailer, at least one accessible unit is required per ADA Standards 213.2. We also handle temporary fencing and handwashing stations around the same footprint for events that need crowd control or extra sanitation stations.
Does a 4 stall trailer need a water and power hookup?
Most units run self-contained with onboard water and holding tanks, so no hookup is required for short events. For extended job site rentals, Charleston Porta Pros can connect to an existing water line if one is available nearby. Ask about power needs when you request a quote for lighting and climate control.
How often is the trailer serviced during a multi-day rental?
Service follows a schedule built around usage, similar to the weekly baseline interval in ANSI/PSAI Z4.3 for standard units. Heavy-use weekend events usually get a mid-event service call. Multi-week job site rentals get a set weekly schedule confirmed at booking.
Can I rent a 4 stall trailer for a single day?
Yes, day rentals are available and priced separately from weekly and event flat rates. A single day works well for a one-day festival, golf outing, or graduation party. Charleston Porta Pros delivers and picks up the same day when needed.
What is the difference between a 4 stall trailer and four separate porta potties?
A trailer has flushing toilets, sinks and interior lighting, closer to a deluxe flushable porta potty experience but in one connected unit. Four separate standard porta potty rentals cost less but do not include running water. Guests generally prefer the trailer for weddings and upscale events.
Do I need a permit for a restroom trailer in Charleston?
Permit rules depend on where the trailer sits and how long it stays. Check our porta potty permit requirements page, and confirm right-of-way placement with the city directly. Charleston Porta Pros can advise once we know the exact site address.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.