What is a 4 stall restroom trailer?
It is a towed or self-contained unit with four private stalls, usually split for men and women, sometimes with a separate ADA-accessible compartment. Think of it as a step up from the standard porta potty rental line and a step below the 8 stall restroom trailer for bigger crowds. Most units run flushing fixtures and a sink, closer in feel to the deluxe flushable porta potty than a basic box. If you need something between a 2 stall and an 8 stall for a wedding at a venue near Ann Arbor, this is the sweet spot. Delivery needs decent clearance, similar to what a roll-off dumpster rental truck needs to back in, so flag any tight driveways or narrow alleys when you book. Ann Arbor Porta Pros can walk your site plan before delivery day.
How much does a 4 stall restroom trailer cost in Ann Arbor?
Pricing depends on duration, hookups and add-ons like heat or AC. Here's what the measured data shows for restroom trailers generally, since the 4 stall sits in the middle of the trailer lineup:
| duration | low | typical | high |
|---|---|---|---|
| day | 175 | 800 | 2500 |
| weekend | 900 | 2000 | 3000 |
| week | 150 | 1397 | 1650 |
| event | 2499 | 3500 | 3899 |
A single day rental fits a quick job site swap. A full weekend covers a Saturday wedding with Friday setup and Sunday teardown. For a deeper breakdown by trailer size, see restroom trailer rental cost or check porta potty rental cost if you're comparing against standard units. Delivery is billed separately in most cases and depends on distance and site access.
Do restroom trailers need a water and power hookup?
Some do, some don't. Fully self-contained trailers carry their own fresh water and holding tanks and run on a generator or standard outlet, which is common for job sites without utilities nearby. Others tie into a garden hose and a 110-volt outlet, which is easier for backyard weddings close to a house. OSHA 1926.51(a)(1) requires an adequate supply of potable water at any workplace, so if this trailer is serving a construction crew rather than a private event, that requirement applies. Ann Arbor sits inland with no coastal drainage concerns, but grade and ground stability still matter for leveling a trailer. Ask about your site's slope when you call Ann Arbor Porta Pros to book.
Is a 4 stall trailer enough for my wedding?
For 100 to 250 guests over a few hours, yes, especially split evenly by gender. Larger receptions or all-day festivals may need the 8 stall restroom trailer instead. Check our wedding restroom rental page for guest-count guidance specific to venues around Ann Arbor.
Can I add an ADA-accessible stall to a 4 stall trailer?
Some 4 stall units include one. If not, pair it with a standalone unit meeting ADA Standards 213.2, which requires at least one accessible unit when portable toilets are clustered. See ADA accessible porta potty and ADA restroom requirements for specs.
How far in advance should I book?
Two to four weeks is safe for most weekends; wedding season and festival dates fill faster. Use the porta potty rental checklist to plan timing, delivery access and hookup needs before you call.
Do I need a permit for a restroom trailer in Ann Arbor?
Placement on private property usually doesn't need one, but anything touching a public right of way needs confirming with the city. See porta potty permit requirements before finalizing a street-adjacent spot.
What's the difference between a 2 stall and 4 stall trailer?
Stall count and footprint. A 2 stall restroom trailer fits smaller gatherings under 100 guests; the 4 stall handles bigger weekend events. Compare both against event restroom rental guidance to pick the right size for your headcount.
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