Standard porta potty
$125 to $250 a weekend
What Is a 4 Stall Restroom Trailer?
It is a towable unit built with four private stalls, sinks, and climbing steps up to a raised deck, sized for events and crews too big for a standard porta potty rental but not quite needing an 8 stall restroom trailer. Milwaukee Porta Pros pulls units for weddings, corporate events, and construction crews across the city. Compare it against the smaller 2 stall restroom trailer if your headcount runs lower, or step up if you are staffing a larger site. Most 4 stall units flush and run water, closer to the comfort level of a deluxe flushable porta potty than a basic unit. If your event skews upscale, the luxury restroom trailer line adds finishes a standard trailer skips. Delivery into Milwaukee, and out to towns like Wauwatosa 3.8 miles west or West Allis 7.0 miles southwest, needs clear, level ground and enough clearance for the tow vehicle to back in and level the unit before hookup.
How Much Does a 4 Stall Restroom Trailer Cost in Milwaukee?
| Duration | Low | Typical | High |
|---|---|---|---|
| Day | $175 | $800 | $2,500 |
| Week | $150 | $1,397 | $1,650 |
| Weekend | $900 | $2,000 | $3,000 |
| Event rate | $2,499 | $3,500 | $3,899 |
Day rates look wide because a single-day pull with full plumbing costs more per day than a week-long rental spreads its setup cost across. A weekend booking for a wedding or graduation party sits between $900 and $3,000, and a full event package with attendant service runs into the $2,499 to $3,899 range. For a breakdown of what drives that spread, see restroom trailer rental cost. If your event only needs one or two stalls, a restroom trailer rental quote in that smaller tier usually beats renting a 4 stall unit you will not fill.
Do I Need a Permit for a Restroom Trailer in Milwaukee?
Placing a trailer that occupies part of a public street, sidewalk, or right of way in Milwaukee needs confirming with the city before delivery. Milwaukee Code of Ordinances Chapter 115 covers obstruction on public ways, and Chapter 245 addresses encroachments and special privileges, but the exact permit name, issuing department, and fee for a restroom trailer specifically are not published in a form we can cite here. If your trailer sits entirely on private property, a driveway, a lawn, or a fenced job site, this usually is not a concern. Milwaukee Porta Pros can walk through placement before you book; see porta potty permit requirements and dumpster permit requirements for how this plays out on similar equipment. For general siting logic, the porta potty placement guide covers ground, slope, and clearance rules that apply to trailers too.
Water service matters as much as placement. OSHA 1926.51(a)(1) requires an adequate supply of potable water at places of employment, which is why job site trailers get tanked and refilled on a schedule rather than left dry. For accessibility on job sites or public events, ADA Standards section 213.2 requires that where portable units are clustered, at least one accessible unit be included, and our ADA accessible porta potty page covers that standard in full alongside ADA restroom requirements.
How many people can a 4 stall restroom trailer serve?
There is no fixed number in code for events, but four private stalls comfortably support a wedding of 150 to 200 guests over a few hours, or a mixed crew on a job site. For hard sizing help, use how many porta potties do I need or check construction site services for crew-based math.
Can a 4 stall trailer be used on a construction site?
Yes. Many Milwaukee contractors pair a trailer with standard units to cover both office staff and field crews. OSHA 1926.51(c)(1) sets toilet ratios by crew size, and a 4 stall trailer can cover that count once you are past 20 workers. See OSHA portable toilet requirements.
Does the trailer need a power hookup?
Interior lighting and pump systems draw power, and most setups run off a generator or a site's existing supply. If you are also running lights or tools nearby, our light tower rental and temporary power pole pages cover job site power separately.
What happens to a restroom trailer in winter?
Trailers need heat tape and antifreeze measures once temperatures drop; Milwaukee's average January low is 15.6 F, cold enough to freeze tanks and lines fast. See porta potty in winter for how Milwaukee Porta Pros preps units for the cold season.
Can I add a handwashing station to my trailer rental?
Yes, and many event planners do, since interior sinks alone may not cover a busy crowd. A standalone unit backs up flow during peak hours; see handwashing station rental for options and handwashing requirements for the standard under 29 CFR 1910.141(d)(2).
What we rent
Four units cover almost every job
Typical Milwaukee ranges, not a quote. Delivery is $50 to $150 and a weekly service visit $30 to $60. See the full cost breakdown.
Deluxe flushing
$200 to $350 a weekend
ADA accessible
$199 to $300 a weekend
Restroom trailer
Quoted by stall count
The rest of the yard
One mobilisation, not three
Roll off dumpsters10, 20, 30 and 40 yardTemporary fencingPanels 6 feet by 12 feetStorage containers20 foot and 40 footHandwashing stationsSinks and sanitiser standsSeptic and grease trapsPumping, cleaning, emergenciesSite power and lightLight towers, temporary poles
We deliver across Milwaukee County and the surrounding metro:
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.