How Many Stalls Do I Actually Need?
Four stalls suits a crowd of 100 to 200 guests over a few hours, or a construction crew running 20 to 40 workers across a shift. If you're closer to 50 people, a 2 stall restroom trailer probably covers it for less money. Push past 200 guests and you're better off looking at an 8 stall restroom trailer so lines don't back up during peak hours. On construction sites, OSHA 1926.51(c) sets the baseline: one toilet facility for 20 workers or fewer, then additional fixtures as headcount climbs past that. A 4 stall unit generally satisfies that ratio for crews up to around 40, though we walk through your actual numbers on a request a quote call. Dearborn crews building near Allen Park, about 5.4 miles south, often split delivery between two job sites in the same trip to save on the delivery fee. If you're still deciding between a trailer and standard units, our how many porta potties do I need guide breaks down the math by headcount and duration.
What Comes Inside a 4 Stall Restroom Trailer?
Expect real flush toilets, sinks with running water, interior lighting and climate control in most units, a step up from a deluxe flushable porta potty but well short of a full luxury restroom trailer build-out. Handwashing setups inside these trailers meet 29 CFR 1910.141(d)(2), which requires soap and towels or a hand dryer at the sink, not just hand sanitizer sitting on the counter. If your event involves painting, staining or pesticide work nearby, note that OSHA 1926.51(f)(1) requires washing facilities specifically for employees handling paints, coatings, herbicides or insecticides, separate from general sanitation needs. Need one stall to be wheelchair accessible? ADA Standards section 213.2 requires at least 5 percent of clustered units to be accessible, and our ADA accessible porta potty page covers what that looks like when trailers are mixed with standard units. Approach ramps for accessible units follow ADA Standards section 405.2, capped at a 1:12 running slope. For crews needing rinse stations separate from the trailer, a handwashing station rental pairs well on larger sites.
Where Can I Place a Restroom Trailer in Dearborn?
Placement needs firm, level ground and clearance for delivery, generally similar to what a roll-off dumpster rental needs, though trailers are heavier and pickier about grade. Our porta potty placement guide covers ground prep in more detail. If the trailer sits in the public right of way anywhere in Dearborn, that placement needs confirming with the city before delivery day; we don't guess at permit rules and neither should you. Check our porta potty permit requirements page for what to ask the city clerk. Events near Redford, 9.6 miles northwest, or Westland, 10.5 miles west, sometimes fall under different jurisdictions than Dearborn proper, so confirm before you commit to a site plan. For weddings specifically, our wedding restroom rental page walks through timing and guest-count math. Multi-day festivals should also see festival restroom rental for service interval planning.
| unit | duration | typical price |
|---|---|---|
| trailer | day | 800 |
| trailer | weekend | 2,000 |
| trailer | week | 1,397 |
| trailer | event | 3,500 |
Do I need a generator for a 4 stall trailer?
Most units need power for lighting, water pumps and climate control. If your site lacks an outlet, ask about a temporary power pole or a generator add-on when you book. Confirm amperage needs during your quote call, since trailer electrical draw varies by model.
How does this compare to renting standard porta potties?
A 4 stall trailer costs more per day than four standard porta potty rental units, but it includes flushing toilets, sinks and climate control. For budget-driven job sites, standard units win. For guest-facing events, the trailer usually wins on comfort.
Can I rent a 4 stall trailer for just a weekend?
Yes. Weekend trailer rentals run higher per day than week-long bookings since it's a short-term premium rate, but many Dearborn weddings and small festivals book exactly this way. Check restroom trailer rental cost for the full breakdown by duration.
Does the trailer need a dedicated water source?
Most units carry an onboard freshwater tank, so a hookup isn't required for short rentals. For multi-week jobs, ask about refill scheduling to avoid running dry mid-week, especially on hot Dearborn summer bookings.
What if my event is smaller than expected?
Downsize before delivery day if you can. A porta john rental or two standard units often covers events under 50 guests for less than the cost of an underused trailer.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.