PortaFab Modular Building Systems

18080 Chesterfield Airport Rd.
Chesterfield, MO 63005


Company Profile

For more than 25 years PortaFab has been a leading manufacturer and designer of pre-engineered modular building systems for endless applications in solving in-plant space problems.

When unexpected changes in business create new demands for in-plant space utilization, modular buildings give you unlimited flexibility in responding quickly - and for much less cost than possible with buildings made from conventional construction.

The scope of our modular systems offers a quality solution for every in-plant space need. The unmatched array of interchangeable panel and stud construction choices, plus standard options, gives you a complete building system with which you can control the design and layout of your plant space.

Modular buildings can be accessorized to fit virtually every need--including sound, thermal and fire insulation; unique electrical and lighting specifications; and aesthetic requirements. All PortaFab modular buildings feature nonprogressive construction. Interchangeable wall panels, door and window panels let you make changes quickly without disturbing adjacent panels or the ceiling.

Modular In-Plant Offices / Enclosures

When changes in your business create new demands for in-plant space utilization, PortaFab modular inplant offices and enclosures give you unlimited flexibility to respond quickly and cost effectively.

As a leader in the design and construction of modular office systems, PortaFab features the most extensive selection of interchangeable wall panels, stud choices, and accessories in the industry. This broad line allows us to more effectively design offices or enclosures to meet your specific requirements and budget.

XTRA-TALL Wall Systems

PortaFab XTRA-TALL wall systems offer a cost effective solution for achieving maximum cleanliness in a controlled environment. These wall systems interface floor, ceiling, and mechanical components to provide an ultra-clean environment with effective control of particulate, pressure, temperature, and humidity.

The high finish panels provide a professional looking appearance while the modular flexibility gives you unlimited design and layout options. And, nonprogressive construction gives you the ability to change configurations quickly and at low cost.

Modular Cleanrooms

For over 20 years, PortaFab has been a leading manufacturer of modular cleanrooms. With three distinct lines of cleanroom wall systems, we can develop a cost effective solution for any application.

All of our wall systems interface with floors, ceilings, and mechanical components to provide an ultra-clean environment with effective control of air flow, pressure, temperature, humidity and filtration. They can be customized to fit your exact requirements and provide a cost-effective alternative to conventional construction without compromising quality, durability or efficiency. Our modular cleanrooms also utilize a flexible design that allows for fast, easy installation in a system that can be expanded or relocated as needs change.

As the leading U.S. manufacturer with representatives and distributors throughout the world, our technology has earned us the reputation as a leader in cleanroom systems. You'll find our modular cleanrooms in the world's most respected companies.

Booths & Shelters

Modular booths and shelters provide fast and affordable solutions for a wide range of applications and PortaFab leads the industry with its line of highly durable, all aluminum structures.

PortaFab shelters are certified welded at all intersections to create a unitized framework with no rivets, bolts, or fasteners.  Choose from 9 standard sizes or custom design a shelter to meet your particular needs.

With standard sizes from 3' x 4' to 8' x 16', there is a PortaFab booth for virtually every space need and budget. All booths are shipped fully equipped and ready for instant use. They can be installed almost anywhere and can be easily relocated if your needs change.

Booths have many features including welded aluminum construction, full 360° visibility, double-sliding tempered safety glass windows, electrical outlets and lighting, and heavy duty doors.

The initial costs run less than 35% of traditional construction, but still feature quality materials and an all welded framing that assure long-lasting maintenance-free performance.

For added security, modular booths are also available in bullet-resistant construction and explosion proof electrical, and can be assembled with ease and are completely transportable.


PortaFab mezzanines allow you to gain the space you need without incurring the cost of new building construction or leasing. These versatile structures create new areas for manufacturing, storage, and offices "out of thin air." Each mezzanine is engineered to provide a solution to your specific space requirements. Our design philosophy focuses on how we can help you utilize the mezzanine so that it will provide the proper performance in a safe, efficient work environment.

PortaFab can also be your single source for creating complete space utilization solutions that require both mezzanines and modular building systems. This single-source ability provides greater engineering control and enables us to coordinate all aspects of projects with our distributors. The result is a fully functional installation delivered complete and on time.

Wall Partitions

PortaFab's modular wall systems can be utilized for a wide variety of applications. From simple office partitions to sophisticated cleanroom walls, our modular systems provide portability along with structural soundness.

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Want to sell one or more used modular buildings? has an incredible network of brokers interested in buying back used modular buildings and mobile office trailers. Call Matt Banes at (714) 442-2757 ext. 502 to talk about our nationwide resale services. specializes in helping businesses and schools rent and buy any type of commercial modular office building, modular classroom, modular church, portable classroom, modular sales office, modular daycare, modular medical clinic, modular bank, mobile office trailer, construction trailer, bathroom trailer, storage container or steel building at the best possible price from a qualified modular building supplier.

Interested in a LEED certified or green modular building?'s President and Founder Matt Banes has helped Architects design and have new modular buildings and modular classrooms manufactured to meet LEED certification.

We also help businesses find accessories for mobile/modular structures such as an aluminum handicap access ramp, OSHA approved steel trailer steps and stairs for mobile homes. is a GBM Marketing, Inc. property


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