Elevate Your Jobsite with Mr. John’s Compact Office Trailer Solutions

Are you looking to revolutionize your jobsite efficiency? Look no further than Mr. John’s innovative compact office trailer solutions. With a perfect balance of versatility and practicality, these options are designed to take your projects to new heights. 8×24 Office Trailer – Perfect for projects where space efficiency is key without compromising on functionality. Discover… Read more »


10′ Containers and 40′ Container Office & Storage Combos added to our Fleet!

In addition to our 20′ and 40′ Storage Containers, Mobile Office Trailers and 20′ Ground Level Office Containers, Mr. John and Tri-Boro Trailer now offer 10′ Storage Containers and 40′ Container Office & Storage Combos!   10′ Storage Container Tri-Boro Trailer’s 8×10 storage containers are safe, convenient, and small enough to fit in a standard parking spot…. Read more »


Winter Is Around The Corner!

Winter can be unpredictable. Be prepared and cozy with our featured products providing maximum comfort and productivity for your people and materials!   8×32 Combo This mobile office and storage combo trailer includes a single office with one entry door and storage area with roll up garage door. Features for this unit include: standard furniture… Read more »


The pieces of Mr. John

At Mr. John, we are passionate about our work and delivering reliable service to our customers each and every time.  Quality makes a difference and here is what separates us from the competition.


Oh, the places we’ll go!

Whether you have a job in Pittsburgh PA or Nashville TN, Mr. John is ready to handle all of your portable sanitation needs. Our portable toilets come in all shapes, sizes and varieties. We can add a sink, a sling or a heater to any portable toilet in our fleet. We have restrooms perfect for… Read more »


The Finer Details of Special Event Sanitation Planning

Restroom trailers and a deluxe porta potty rental might be just what you need to complete your next special event. These types of portable sanitation units are designed to help provide you with the facilities you need for your guests or event attendees. Making provisions for portable restroom trailers requires you to invest some time… Read more »


Infographic | Construction Site Sanitation

Warm weather, sunny skies and melting snow. Construction season is just around the corner. If you’re a project or construction site manager, odds are that you will be spending the next few weeks getting your worksite, workforce and creating your plan to efficiently and effectively take on your next project.


Construction Office Trailers and Container Offices

Are you planning a construction project? You will need an office trailer or container offices to help you stay organized and to set up shop on. How can you find the right trailer? What things will you need for the trailer to work effectively? Here are some things you need to consider if you need… Read more »


2 Ways 2 Save

  Tri-Boro Trailer has been a top provider of office trailer and mobile storage solutions to the construction industry since 1964. We handle all types of jobs including residential, commercial, industrial, highway, and remodeling projects.