Did you know that construction sites are where some of the first porta-potties were used? These portable toilets were designed to eliminate the need for workers to travel long distances to use the facilities. This created more productive, efficient, and sanitary working conditions.

Today, most municipalities require construction sites to have portable toilets on site. In this guide, we’ll explore the factors to consider and provide a formula to help you determine the right number of portable toilets for your construction site.

Several factors come into play when calculating the number of portable toilets required for your construction site. Consider the following:

  1. Number of Workers: Determine the maximum number of workers on-site during peak hours. This will give you a baseline for estimating the required toilet facilities.
  2. Duration of the Project: Consider the estimated duration of the construction project. Longer projects may require additional toilets to accommodate workers over an extended period.
  3. Work Schedule: Consider the work schedule and breaks. Long days or concurrent break times may require more toilets to avoid long queues and ensure efficient use.
  4. Gender Breakdown: Take into account the gender breakdown of your workforce. Different regulations exist for male and female toilets, so ensure compliance with these requirements.
  5. Regulatory Requirements: Familiarize yourself with local regulations and health codes regarding the number of toilets needed based on the size of the workforce.

Additional Considerations for Calculating the Number of Portable Toilets


We generally recommend at least one toilet per 10 workers with a weekly servicing schedule. In addition to the number of toilets, there are other important factors to consider when renting porta-potties for a construction site:

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  • Accessibility and Placement: Ensure all porta-potties are easily accessible to all workers. Place them strategically throughout the construction site, considering proximity to work areas and ease of use. If you’re unsure what the best placement would look like, our team can walk you through it.
  • Maintenance and Servicing: Regular servicing of the porta-potties helps maintain the functionality of the toilets and provides a safe and more comfortable environment for workers. We recommend that portable toilets are serviced, but in the cooler months, servicing schedules can be extended to every other week, provided the ratio of workers per toilet is fewer than 10.

Providing adequate toilet facilities on construction sites is not just a matter of compliance; it’s a necessity. By choosing a local company to provide your construction site’s porta-potties, you ensure that your toilets comply with local regulatory requirements and can be serviced and maintained easily.

Need porta-potties for your construction site? We rent high-quality portable restrooms to construction sites across southwest Washington and northwest Oregon. So whether you’re in Vancouver, WA, Portland, OR, or other nearby cities and need to rent a portable restroomwash stationADA-compliant, or wheelchair-accessible restroom or holding tank, contact us today so that we can give you a porta-potty quote for your construction site.