Tell us when people will actually use the facilities
A total attendance figure is useful, but it is not a complete porta potty plan. For a Dunedin gathering, explain whether people stay together for a programme or arrive and leave throughout the day. For a worksite, describe the largest crew present at once, including visiting trades. Discuss the proposed number with the rental contact rather than relying on a universal calculator.
For a worksite, describe a normal day and the busiest day
List the working hours, overlapping shifts and separate areas where people work. Identify indoor bathrooms the crew is allowed to use; facilities reserved for residents or staff may not reduce the temporary need. Mention expected changes in staffing and whether washing is needed at the same position as the toilets.
Separate staffing from physical layout
Two work areas may share a headcount but have no practical walking route between them. Explain the layout as well as the peak crew. The responsible employer must review applicable workplace requirements; this guide does not set or certify a compliant toilet count.
For an event, include people outside the guest total
Organisers, vendors and setup teams may need facilities before visitors arrive or after they leave. Give the programme breaks, expected peak attendance and full period of use. Confirm which venue bathrooms are included and when they are open. Mention accessible facilities and the places where guests can wash their hands.
Describe concentrated use
A seated programme with one interval and an open-house gathering have different use patterns even if the daily attendance is similar. Share that distinction and ask whether the planned service access can accommodate the proposed arrangement.
Send estimates without pretending they are final
If attendance or staffing is uncertain, label the estimate and explain what may change. Keep the quote contact updated before the booking and during a longer rental. Review quantity, supplies and service together: adding facilities without a workable access plan may leave an important part of the problem unresolved.
- Peak users and the times they need access.
- Indoor facilities genuinely available to those users.
- Separate work or event areas and walking routes.
- Washing, accessible-entry and service needs.
Send your Dunedin planning brief or compare equipment categories. A request starts a discussion; it does not reserve an inventory item.