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 prefabricated buildings & structures since 1969

Welcome to Porta-King Building Systems.

Since 1969 our modular inplant offices, prefabricated mezzanines, outdoor equipment enclosures, and guard buildings 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.

Porta-King Case Studies

Baltimore School Improves Safety with an Entry Vestibule from Porta-King

Safety is one of the top priorities at Bnos Yisroel, a girls school in Baltimore Maryland with 500 students and 150 staff members. After conducting a comprehensive security audit, school administration discovered that the main entryway was the most vulnerable point. Creating a secure entryway vestibule that would allow school administrators to both identify visitors […]

Custom Designed Guard Booths For Semi-Conductor Manufacturer

Porta-King supplied two custom-designed guard booths to a West Coast based manufacturer of semi-conductors. These portable guard buildings serve to control access points to their world headquarters corporate campus parking facility. Custom Portable Guard Booth Features The guard booth featured in the image above controls access as employees and guests enter the parking area. A […]

Porta-King Installs Modular Wall System For Brake Manufacturer

For manufacturers, wall partitions are an important part of keeping sensitive equipment safe from dust and debris from surrounding areas. That’s why Porta-King installed a modular wall system for a manufacturer of brake shoes for trucks.

guard towers and modular guard buildings with schematics