Most St. Louis weddings need one standard unit per 50 guests, or a 2-stall restroom trailer for anything over 100. A single ADA unit rounds it out. Rental for a weekend event typically runs in the low hundreds per unit, and a full restroom trailer rental for the weekend lands higher depending on size.
Start with your guest count and work backward. A tent reception for 80 people usually calls for two standard units, plus one ADA-compliant unit under ADA Standards section 213.2, which requires at least one accessible unit whenever units are clustered, even if the cluster is small. For weddings over 100 guests, most couples in St. Louis skip the standard lineup entirely and rent a 2 stall restroom trailer or 4 stall restroom trailer instead, since a trailer handles the flow better at a cocktail hour than three separate doors spread across a lawn. Guest count matters more than acreage. A backyard wedding in Webster Groves, 8.6 miles southwest of downtown St. Louis, and a barn venue further out both need the same math: bodies divided by hours of active drinking and eating.
If your venue already has indoor plumbing but you are worried about lines, a single deluxe flushable porta potty or two can take pressure off the main building without the cost of a full trailer. For events under four hours, one unit per 75 guests is often enough. Longer receptions, especially ones serving alcohol for six-plus hours, push that ratio down. Use the how many porta potties do I need guide if your event falls outside a simple case, and check the porta potty placement guide before you finalize a site map, since placement affects both guest experience and servicing access.
Pricing depends on unit type, rental length and whether you need a trailer or standalone units. Below are typical bands pulled from regional pricing data, not quotes for a specific date.
| Unit | Weekend | Week |
|---|---|---|
| Standard unit | $125 - $400 | $130 - $500 |
| ADA unit | $199 - $300 | $185 - $240 |
| Deluxe flushable | rates vary by package | $150 - $290 |
| Restroom trailer | $900 - $3,000 | $1,397 - $1,650 |
A delivery fee applies on top of the unit rate, and weekend delivery fees run higher than weekday ones because of scheduling. Full-event trailer packages, common for larger weddings, sit in a separate tier entirely and are usually quoted as a flat event rate rather than a day rate. See restroom trailer rental cost and porta potty rental cost for the fuller breakdown, and wedding restroom rental planning if you are comparing against a general event rather than a wedding specifically.
Most wedding rentals in St. Louis run as a weekend package: drop-off Thursday or Friday, pickup Monday. That is different math than a porta potty rental per day or a monthly porta potty rental, so make sure whatever quote you get actually matches your event window before you compare it against another vendor's number.
Restrooms need a stable, level surface and a clear path, not just an open patch of grass. ADA Standards section 302.1 requires floor and ground surfaces under an accessible unit to be stable, firm and slip resistant, which rules out soft turf or gravel without a mat underneath. The route to the unit needs at least 36 inches of clear width per ADA Standards section 403.5.1, and the door opening itself needs to clear 32 inches under section 404.2.3. A trailer needs more: figure on close to 60 feet of straight clearance behind the delivery truck for a restroom trailer rental, which rules out tight driveways or venues with a single narrow access road.
Think about your caterer's tent, your DJ's cable runs and your parking layout before you pick a restroom spot. Guests should be able to find the units without walking past the head table, but staff should be able to service them without crossing the dance floor. If your venue is near University City, 7.9 miles northwest of St. Louis, or out toward Chesterfield, 19.2 miles west, confirm your access road width with the venue coordinator early, since rural properties often have narrower gravel drives than city lots. For handwashing near the food service area, a handwashing station rental or portable sink rental keeps hands clean without funneling everyone back through the reception tent. Cold weather weddings should also check porta potty in winter for servicing notes.
Book as soon as your venue and headcount are set, ideally two to three months out for peak wedding season. Popular weekends fill fast, and trailers book out further than standard units. If your date is close, check emergency porta potty rental for short-notice availability.
Many outdoor and barn venues without full plumbing require you to arrange your own units. Confirm with your venue directly, and check any porta potty permit requirements if the units sit on a public right of way rather than private venue land.
A standard unit is a self-contained stall with its own holding tank. A trailer has multiple stalls, sinks and often climate control, closer to indoor plumbing. Trailers cost more but suit formal weddings and larger guest counts better. Compare options at restroom trailer rental.
Yes. Even a small cluster of units must include at least one accessible unit under ADA Standards section 213.2. A single ADA accessible porta potty satisfies that requirement for a small guest list without needing a second unit.
At 150 guests, most planners in St. Louis move to a multi-stall trailer rather than standalone units. An 8 stall restroom trailer or two 4-stall units usually covers a reception that size comfortably for a full evening.
Yes. St. Louis Porta Pros delivers wedding restroom rental across St. Louis and the surrounding metro, with same-day and next-day drop-off available on most orders.
Pricing depends on the unit and how long you need it. See our cost breakdown and request a free quote for an exact figure.
Standard rentals include scheduled service — a pump-out, a clean, a restock and fresh deodorizer. Busy or hot-weather sites can be serviced more often.
Call now or request a free quote — clean units, on-time delivery, transparent pricing.
