4 Stall Restroom Trailer in Seattle, WA

Four stalls covers roughly 100 to 150 guests over a few hours, more if the event runs shorter or has a bar. If you are closer to 200 guests, look at the 8 stall restroom trailer instead, or check our guide on how many porta potties you need for the math behind that number. Weddings and receptions tend to want the nicer finish, which is why couples usually browse the luxury restroom trailer or deluxe flushable porta potty line before booking. Construction crews on a build in Seattle often pair a 4 stall unit with a construction dumpster rental and a temporary power pole so the whole site gets set up in one trip. If your event needs an accessible stall, ADA Standards section 213.2 requires that clustered single-user units include at least one accessible unit, and our ADA accessible porta potty page covers what that looks like for a trailer setup.

Expect four private stalls, sinks with running water, and enough space that guests aren't waiting in line. Delivery needs about 60 feet of straight clearance behind the truck, the same clearance a roll-off truck needs, so tight driveways in older Seattle neighborhoods sometimes call for a site visit first. On the sanitation side, OSHA 1926.51(c) sets toilet ratios for construction crews, while 29 CFR 1910.141(d)(2) requires soap and towels or a hand-drying device at any washing station, hand sanitizer alone does not satisfy that rule. If your event or crew needs more than restrooms, we also handle temporary fence rental, handwashing station rental, and storage container rental for job trailers or event storage. For something smaller than a 4 stall unit, the 2 stall restroom trailer is worth a look, and for showers on a multi-day event, see the shower trailer rental page.

Pricing below reflects daily, weekly, and event-length rentals separately, since a longer booking should never cost less per day than a short one.

For a broader cost breakdown across unit types, see restroom trailer rental cost or the general porta potty rental cost page. Event bookings in Seattle, especially weekend weddings, tend to land at the higher end of that band because setup and teardown both happen fast.

How far in advance should I book a 4 stall trailer?

Two to four weeks is safe for a standard weekend event in Seattle; peak summer dates can book out faster. Construction crews on multi-month jobs should lock in delivery windows early, especially if the site also needs septic pumping service on a recurring schedule.

Can I place the trailer on the street instead of a driveway?

Only with a permit confirmed through the city first, since Seattle's Street Use rules apply to the public right-of-way. Placement also needs 30 feet from intersections, 10 feet from driveways, and 15 feet from fire hydrants under the city's container placement standards.

Do I need a separate handwashing station if the trailer has sinks?

Usually not, since trailer sinks satisfy general handwashing needs under 29 CFR 1910.141(d)(2). If crews are applying paint, coatings, or pesticides, OSHA 1926.51(f)(1) requires washing facilities for that contaminant exposure specifically, which a standalone handwashing station rental can cover.

What is the difference between a 4 stall and an 8 stall trailer?

Stall count, mainly, and how many guests it comfortably serves per hour. The 8 stall restroom trailer suits larger festivals and multi-day events, while 4 stalls fits mid-size weddings and single-day crews well.

Is a 4 stall trailer better than renting several standard units?

For events with a dress code or a longer guest list, yes, sinks and flushing toilets beat a row of standard porta potty rental units. For a bare construction site, standard units paired with a porta john rental order are often the cheaper call.