Restroom Trailer vs. Porta Potty: Which One Does Your Event Need?
A standard porta potty costs $150 to $300 per event and a restroom trailer costs $2,799 to $5,699 per event, according to Stahla's published 2026 rate table. Porta potties win on price, footprint and sites with no power or water. Trailers win for weddings, upscale events and long winter jobs where guests expect flushing toilets, sinks and climate control.
At a glance
| Porta potty | Restroom trailer | |
|---|---|---|
| Published price (Stahla 2026) | $150–$300 per event; VIP units $400–$800 per day | $2,799 (2-stall) to $5,699 (10-stall) per event, Friday to Monday |
| Long term | $75–$150 per month (standard) | $5,299–$12,299 per 28 days |
| Power / water | None needed | Power needed; water hookup or onboard tank ($899 Mobile Water and Waste Box per event) |
| Setup | Drop and go | Setup $1,499 per trailer ($1,999 ADA); pack-up $999 ($1,499 ADA) |
| Best for | Festivals, job sites, remote sites | Weddings, corporate events, VIP areas, winter job-site offices |
Job sites
OSHA 29 CFR 1926.51 Table D-1 sets the count either way: 1 toilet for 20 or fewer employees; for 20 or more, 1 toilet seat and 1 urinal per 40 workers; for 200 or more, 1 seat and 1 urinal per 50 workers. A trailer stall counts the same as a porta potty seat.
When to choose each
Porta potty: no power or water at the site, a crowd that comes and goes, or a tight budget.
Restroom trailer: guests in formal wear, events past dark, cold or very hot weather (Stahla lists climate control at $200–$400 and a Heat Lock at $499 per event), or a long job where crews want sinks.
Mix: many events put a trailer near the VIP or reception area and porta potties at the edges.
Frequently Asked Questions
Is a restroom trailer worth the cost for a wedding?
For most evening weddings, yes: flushing toilets, sinks and lights, at $2,799 for a 2-stall unit per Stahla's 2026 rates.
How many porta potties per guest?
Use the porta potty calculator; local event rules (for example Houston's one per 300 people policy or Sacramento's one per 250 recommendation) set the floor.
Do trailers need a permit?
The event usually needs the permit, not the trailer; see each city page for the fee.
Information only — not legal or financial advice. Data last reviewed 2026-10-16.
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