What Is a 4 Stall Restroom Trailer?
It is a towable unit divided into separate private stalls, built for sites where a single portable toilet rental or two won't keep up with the crowd. Each stall locks from inside and most trailers at this size include a sink, so guests wash up without walking to a separate handwashing station rental. Compare that to a standard porta john rental with its 60 to 70 gallon holding tank, and the trailer format holds more capacity across more users before it needs service. South San Francisco Porta Pros delivers these to job sites and private events, and if you're weighing formats, the restroom trailer rental page breaks down the 2 stall and 8 stall options too, alongside the 2 stall restroom trailer and 8 stall restroom trailer for comparison. Delivery needs a reasonably flat, accessible pad, similar to what a roll-off dumpster rental needs for its own clearance.
How Much Does a 4 Stall Restroom Trailer Cost in South San Francisco, CA?
Trailer pricing depends heavily on duration and finish level. A short day rental sits at the low end of the band; a full weekend or multi-day event pushes the number up fast because setup, pumping and teardown all factor in.
| duration | typical range |
|---|---|
| day | $175 - $2,500 |
| week | $150 - $1,650 |
| weekend | $900 - $3,000 |
| event (multi-day) | $2,499 - $3,899 |
These bands cover the range from a basic day rental to a full festival setup, so get a number specific to your guest count and dates through request a quote. If your event runs closer to a single day, check the porta potty rental per day breakdown, and for longer jobs the monthly porta potty rental page covers standard units instead. Full cost drivers for trailers, including delivery fees, live on restroom trailer rental cost, and general porta potty rental cost covers the standard-unit side of the comparison.
Does a 4 Stall Restroom Trailer Meet ADA Requirements?
Not automatically. Most 4 stall trailers are built for standard access, not wheelchair turning space, so if you need compliance you should pair the trailer with a dedicated ADA unit. ADA Standards section 304.3.1 calls for a 60 inch turning circle, and section 404.2.3 sets a minimum 32 inch clear door opening, specs a standard trailer stall often can't meet. ADA Standards section 213.2 also requires that at least 5 percent of clustered single-user toilets be accessible, with never fewer than one. South San Francisco Porta Pros can add a separate ADA accessible porta potty alongside your trailer for full-day or full-weekend events; details on layout and reach ranges are on ADA restroom requirements. For construction sites in South San Francisco running toilet counts by crew size, OSHA 1926.51(c)(1) sets the ratio: 1 toilet per 20 workers or fewer, scaling up from there, which the OSHA portable toilet requirements guide walks through.
Placement matters too. If the trailer sits anywhere near a public sidewalk or right of way in South San Francisco, confirm placement with the city before delivery day; that question gets covered in more depth on porta potty placement guide and porta potty permit requirements. For weddings, the wedding restroom rental page has staging tips, and festival organizers should see festival restroom rental for larger guest counts.
How many stalls do I need for my event?
Depends on guest count and duration. A rough guide: one stall per 50 guests for a few hours works for most events, more if alcohol is served or the event runs past four hours. See how many porta potties do I need for a fuller breakdown by headcount.
Can I get a 4 stall trailer delivered same day?
Sometimes, depending on route and availability. South San Francisco Porta Pros handles rush requests when the schedule allows; call ahead rather than assume. For true last-minute needs, emergency porta potty rental covers faster-turnaround options.
Does the trailer need a power hookup?
Most 4 stall trailers run lighting and pumps off an onboard battery or standard outlet; confirm your unit's specs at booking. Sites needing more power for lighting or tools can add a temporary power pole or light tower rental.
How far will South San Francisco Porta Pros deliver?
Routes cover South San Francisco and nearby cities, including San Bruno 5.5 miles southwest and Millbrae 7.2 miles south. Check service areas for the full list, or the porta potty rental south san francisco page for city specifics.
What is the difference between a 4 stall and 8 stall trailer?
Stall count and footprint. The 4 stall fits smaller weddings and mid-size crews; the 8 stall restroom trailer handles bigger festivals and multi-day builds where line management matters more.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.