Graduation open house: plan the bathrooms early
When graduation season lands around Indianapolis, why those Saturdays go first, and how to size the restrooms for a party where guests come and go.
· Restroom Ranch, Westfield, Indiana
The short answer
A graduation open house brings guests through your home all afternoon, each arriving and leaving on their own schedule. With one or two bathrooms in the house, that is a long, steady line. A restroom trailer in the driveway takes it outside.
The part people leave too late is the booking. Around Indianapolis, the 2025 high school graduations ran from May 22 to June 8, according to the Indianapolis Star, so most open houses land on the same few Saturdays. Those Saturdays are in wedding season too, and they are the dates that fill first. Book the trailer when you set the date.
When graduation season lands around Indianapolis
The 2025 ceremony dates the Indianapolis Star published for nearby high schools.
| High school | 2025 graduation |
|---|---|
| Carmel | May 22 |
| Westfield | May 23 |
| Avon | May 30 |
| Center Grove | June 1 |
| Noblesville | June 3 |
| Fishers | June 4 |
| Hamilton Southeastern | June 5 |
| Brownsburg | June 7 |
| Zionsville | June 8 |
Each district sets its own date every year, so check your school’s calendar for the spring you are planning. The pattern is what matters: a whole class graduates on one day, so an open house the weekend after lands on the same Saturday as many of its classmates’ parties.
Why those Saturdays book up
Graduation season sits inside wedding season. The Saturdays between May and October are the dates our trailers book first, and late May and early June add every open house in the class to the weddings already on the calendar.
So reserve when you set the date, not when you send the invitations. Two things to know before you pay the deposit: all payments are non-refundable, including cancellations for weather, and if the party must move, we do our best to reschedule within six months so the deposit goes toward the new date. Equipment availability on the new date is not guaranteed, and the deposit is forfeited if it is not used within the same calendar year.
Sizing for a drop-in party
An open house spreads the guest list across the afternoon, so fewer people are there at any one moment than at a sit-down party of the same size. The hours work the other way: a restroom used steadily from noon to six sees a lot of traffic, and our sizing guide treats anything past about four hours as a bigger crowd than the headcount suggests.
Our 2-Station, with one women’s and one men’s room, is the size we suggest for a backyard party, from $1,420 per event. Bigger open houses move up to the 3-Station, which comfortably serves up to 225 guests, from $1,749. Delivery, setup and pickup are included either way.
Tell us how many people you are inviting, the hours on the invitation and whether there will be a bar, and we will tell you which one fits. How many restrooms you need explains the rest of the sizing.
The house, the driveway and the septic
We have covered these for any party at home. The short version:
- A level spot. A flat stretch of driveway often works best. Our porta potty dimensions guide gives each trailer’s size and the space to keep clear.
- Two circuits and a spigot. Two separate 120-volt, 20-amp circuits within 100 feet, and an outdoor spigot or the trailer’s onboard tank.
- Nothing goes into your septic. The trailer’s waste stays in its own tank and leaves with it.
Our guide to renting a restroom for a party at home covers each of these in full, including the EPA’s advice on septic systems and what to check with an HOA.
Questions families ask
When are graduation open houses around Indianapolis?
Around the graduation dates, which the Indianapolis Star’s list of 2025 ceremonies puts between May 22 at Carmel and May 23 at Westfield and June 8 at Zionsville. Each district sets its own date every year, so check your school’s calendar.
Do I need a restroom trailer for a graduation open house?
If guests will be there all afternoon and the house has one or two bathrooms, or a septic system, a trailer keeps the line and the load out of the house. For a short party with a small list, your own bathrooms are usually fine.
What size restroom trailer do I need for an open house?
Our 2-Station is the size we suggest for a backyard party, from $1,420 per event. Bigger open houses move up to the 3-Station, which comfortably serves up to 225 guests, from $1,749. A party running past about four hours, or with a bar, is a reason to size up.
How far ahead should I book?
When you set the date. The Saturdays between May and October book first, and graduation weekends fall in the middle of wedding season.
What if it rains on the day?
All payments are non-refundable, including cancellations for weather. If the party must be canceled or moved, we do our best to reschedule within six months so the deposit goes toward the new date. Equipment availability cannot be guaranteed, and the deposit is forfeited if it is not used within the same calendar year.
Hold your open house date
Send the date, the address and how many people you are inviting. We will tell you which trailer fits and what it costs, with delivery, setup and pickup included.