Restroom Calculator

Need an estimate for how many porta potties your event needs? Use this handy calculator! For a more specific quote tailored to your needs, call us today at 800-210-8407!

special events calculator

Portable Heat Calculator

Need an estimate for how many BTU's you'll need to heat up your space? Use this handy calculator! For a more specific quote tailored to your needs, call us today at 800-210-8407!

Heating Calculator
*Please press the "tab" key on your keyboard or click out of the field after entering all fields to ensure the calculation is correct.


About Us

Complete Satisfaction is More Than Our Goal. It’s Our Standard.

Our Story

For nearly three decades, On Site Companies has been the market leader in portable sanitation and temporary climate control. We provide portable sanitation for commercial, construction, industrial, agricultural, special events and disaster relief, as well as heating and air conditioning rentals for special events and construction.

The service that our sanitation and heat technicians provide is the best in the business. We are dedicated to continuing to innovate our products and service techniques to make sure that we can provide you with exactly what you need.

On Site Companies is family owned and operated as well as a certified woman-owned business. On Site was founded by Dave and Karen Holm nearly 30 years ago. Today, the day-to-day is managed their children, Russ and Molly, while Dave and Karen serve in a strategic management position.

We take great pride in our company, its products, and the high level of service we provide. We offer 24-hour delivery service to the Minneapolis/ St. Paul Metro Area, Rochester MN and Mankato MN, and St. Louis, MO.

Our Mission Statement

To consistently lead our organization with integrity and professionalism. To provide an enriching and rewarding environment for our employees. To strive for solid financial performance and prosperity of our company.

Our Vision Statement

We will be the most reliable company within our industries, employ talented people who quickly respond to and solve problems for our customer and our company.

We will continue to reinvest in our company to maintain a prosperous, healthy and rewarding work environment.

Our Values

Acting Positive, Showing Willingness, Being Dependable, Expressing Loyalty, Working as a Team, Having Integrity

Our Core Focus™

Creating Professional Opportunities

Temporary Solution. Permanent Commitment

Our commitment is to ensure that you receive the correct equipment for the job at hand, and this equipment is always clean, sanitized and in excellent working order. Whether you are having a small backyard graduation, birthday or wedding, doing a small remodeling project or a major commercial construction project, On Site will meet your needs with clean, sanitary portable restroom facilities.

Our Commitment to Quality

On Site Companies is a member of the Portable Sanitization Association International which teaches best practices for the portable sanitation industry. Our sanitation technicians and branch managers are certified through the PSAI, and in 2013 one of On Site’s drivers was named the Portable Sanitation Technician of the Year. We are committed to keeping up with industry best practices and acquiring the most up to date equipment and techniques to provide you with the best service possible.

Frequently Asked Questions

Standard office hours: Monday through Friday, 7:00 a.m. – 5:00 p.m.
Summer weekend office hours (June 1st – October 1st): Saturdays 8:00 a.m. – 12:00 p.m.

In case of an emergency an on-call team member can be reached after hours by calling 1-800-210-8407.

On Site Companies serves the surrounding metropolitan areas of Minneapolis, St. Paul, Rochester, Mankato, St. Cloud MN, and St. Louis, MO. Luxury portable bathroom trailers and shower trailers are available for nationwide delivery.

Monthly construction site rentals: Each weekly serviced portable toilet can accommodate up to 10 workers (working a single 40-hour shift) ANSI Z4.3-2005. Special event rentals: Each unit can accommodate approximately 200 uses with 4 hours between uses before service is required. The Americans with Disability Act requires that 5% of all porta potty rentals ordered be enhanced access, or a minimum of one per order. We offer Enhanced Access Toilets. Please refer to our Special Event Usage Guide to help plan your event. Special Event Usage Guide (PDF) Please contact our sales team for rental prices and to help you determine the best sanitation solutions for your needs.

We accept all major credit cards (Visa/MasterCard/Discover/AmEx), electronic wire transfers, and checks (Note: all special event check payments must be submitted two weeks prior to the rental date).

All units should be placed on a level surface, no further than 20 feet from a hard surface (so that our service trucks can access the portable restroom).

On Site Companies offers service from the following locations:

Twin Cities, MN: 95 Woodlynn Ave., St. Paul, MN 55117
Rochester, MN: 1635 Voll Drive NW, Rochester, MN 55901
Mankato, MN: 1504 Old Minnesota Avenue, Mankato, MN 56082
St. Louis, MO: 13707 Green Ash Court St. Louis, MO 63045

Portable restroom service schedules will be altered in observation of the following holidays:
Memorial Day
Independence Day
Labor Day
New Year’s Day

Services normally scheduled on these dates will be performed prior to or the day after the holiday. On Site specializes in portable toilet event service. Let us help you prepare for your holiday celebrations with a full line of portable sanitation solutions.

All rentals will be delivered by the day you need it. Emergency same-day service can be arranged; please note additional delivery fees will apply.

All rentals will be picked up within two business days after your event, unless otherwise specified.

Absolutely. Please consult your sales representative for additional fees and scheduling.

We have the capabilities of servicing most RV’s, boats and trailers. Please contact us to schedule a time to bring your boat or RV by our location, or we can schedule during the week with one of our service routes.

Yes. We take great pride in knowing that we are a leader in eco-friendly initiatives in our industry.

Minneapolis/St. Paul

  • Minnesota Festivals and Event Association
  • Association of Women Contractors
  • Association of General Contractors
  • Stillwater Chamber of Commerce
  • Builders Association of Twin Cities
  • Visit Saint Paul


  • Rochester Area Builders Association
  • Commercial Builders Council in Rochester

Wedding Memberships

  • Rainbow Wedding Network
  • Twin Cities Wedding and Event Professionals
  • The Knot
  • Forever Bride


  • Minnesota River Builders Association

St. Louis

  • Home Builder Association of St. Louis
  • Home Builder Association of Eastern, MO

Related Resources

On Site Companies can offer you a wide range of portable toilet and sanitation solutions to serve your needs.

Contact Us Now to Get Started on a full quote