Guard Booths & Buildings

Outdoor Equipment Enclosures

Modular Inplant Offices

Modular Walls & Partitions


Guard Towers

Sports Video Towers

Prefabricated Shelters & Vestibules

Committed to creating modern, innovative, cost effective, and quality modular and prefabricated building systems and structures since 1969

Welcome to Porta-King Building Systems.

Since 1969 our modular inplant offices, prefabricated mezzanines, outdoor equipment enclosures, and guard booths have been used for thousands of unique construction applications across North America and throughout the world. We provide our customers with cost effective, highly functional, easy to assemble alternatives to conventional construction.

Porta-King Building Systems offers more prefabricated and modular buildings than any other manufacturer. We offer five different types of prefabricated buildings and shelter systems that include high-level ballistic rated construction. We manufacture eight different types of modular wall systems, structural steel mezzanines and towers. All of these products have attributes that support the efforts of those companies and organizations that want to incorporate a sustainable design philosophy into their business.

We believe the key to our success has been our ability, and willingness, to adapt to new industry trends. Since our inception we have responded to our customers by introducing many "industry firsts" to address these developing trends in the modular and prefabricated construction industry. This includes new products, modification to existing products which includes adaptation to address new building and energy code requirements. Learn how our experience, quality and service can help your organization with versatile and cost effective modular building solutions.

A Few Of Our Satisfied Clients

Porta-King Case Studies

Boiler Enclosures Provide Safety and Energy Efficiency for this Aerospace Company

About a year ago, a midwest-based manufacturer of aircraft engines came to us with a problem. They needed to reduce demand on their aging power plant and were looking to realize energy savings and increase flexibility to their manufacturing processes as well. To accomplish this, they wanted to begin installing small process-specific boilers around their […]

A Data Storage Facility for Western Construction: Aesthetics Combined with Security

Any business in the data storage industry must make security a priority. Data storage server farms, a collection of servers that provides functionality beyond the capability of one machine, require an enormous amount of power and protection to run effectively. Managing such a business means controlling access and maximizing data center efficiencies. Western Construction Services […]

guard towers and modular guard buildings with schematics