How much does a 4 stall restroom trailer cost in Boulder?
Trailer pricing runs wide because setup, hookups and rental length all move the number. A day rate for a trailer this size starts around 175 dollars on the low end and can run to 2,500 for a loaded unit with extra features. Weekend rentals fall between 900 and 3,000, and a full week lands between 150 and 1,650 depending on the trailer package. Check restroom trailer rental cost for how those bands break down further.
| duration | low | typical | high |
|---|---|---|---|
| day | 175 | 800 | 2500 |
| weekend | 900 | 2000 | 3000 |
| week | 150 | 1397 | 1650 |
A wedding at a Boulder venue usually books the weekend rate. A construction crew on a longer job leans toward the weekly number. If you're not sure which fits, request a quote and we'll walk the site plan with you. Compare this against a 2 stall restroom trailer or an 8 stall restroom trailer if your headcount sits above or below the range a 4 stall unit covers well.
How many stalls do I actually need for my event?
Four stalls generally covers events between 150 and 400 guests over a few hours, though that number shifts with bar service, ceremony length and how long the crowd stays put. Boulder Porta Pros sizes trailers against the same logic OSHA uses for job sites: under OSHA 1926.51(c)(1), a construction crew needs 1 toilet for 20 workers or fewer, scaling up from there. Events don't fall under that rule directly, but the ratio logic still helps. Our how many porta potties do I need guide breaks down headcount math for parties, weddings and races. If your event runs past 400 guests, step up to an 8 stall restroom trailer rather than doubling up 4 stall units, since one bigger trailer is easier to service than two smaller ones side by side.
For a construction site in Boulder running multiple trades and long days, a 4 stall trailer often replaces four separate standard porta potty rentals and gives crews a sink they'll actually use. That matters for handwashing station requirements tied to job site sanitation.
Do 4 stall restroom trailers meet ADA requirements?
A standard 4 stall trailer is not automatically ADA compliant. Under ADA Standards section 213.2, where portable toilet units are clustered, at least 5 percent must be accessible, with a minimum of one unit regardless of cluster size. That standard was written around single-user portable toilets, but the same accessibility logic applies when you're planning trailer stalls for a public event. An accessible route needs 36 inches of clear width per ADA Standards 403.5.1, and the door opening itself needs 32 inches clear under ADA Standards 404.2.3. If your event needs a dedicated accessible unit, pair your trailer order with an ADA accessible porta potty rather than assuming the trailer covers it.
Delivery matters too. Our crews need a clear approach to set the trailer level and hook up water, and placement questions come up often enough that we cover them in the porta potty placement guide. If your event sits near a curb, sidewalk or the public right of way, that placement needs confirming with the City of Boulder before delivery day. A site 3.5 miles east near Valmont or 9.4 miles southeast toward Louisville still falls inside our standard delivery radius, so distance rarely changes the quote.
Do 4 stall trailers have air conditioning and heat?
Most 4 stall trailers in our fleet include climate control, which matters for a Boulder summer event or a winter job site. Ask about it when you book, since not every unit is configured the same way. Pair with a luxury restroom trailer upgrade if your event calls for finished interiors.
How much space does delivery require?
Trailers need firm, level ground and enough clearance to back in and level the unit. If you're also renting a roll-off dumpster for the same job, note that dumpster delivery alone needs about 60 feet of straight clearance behind the truck, so plan both deliveries with that in mind.
Can I rent a 4 stall trailer for a single day?
Yes, day rentals are available and priced separately from weekend and weekly rates. A one-day rental works well for a golf tournament or a single wedding day. See event restroom rental for event-specific planning.
Does the trailer include water and sinks?
Yes, our 4 stall trailers include running water at each sink, which is different from a standard portable toilet. Compliant handwashing under 29 CFR 1910.141(d)(2) requires soap and towels or a drying device, not hand sanitizer alone, and our trailers are set up to meet that.
What is the difference between a 4 stall and 8 stall trailer?
An 8 stall trailer doubles your stall count for larger crowds, generally 400 guests and up. If you're between sizes, our team can help you decide when you request a quote for your specific headcount and event length.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.