Modular Offices, Walls, and Buildings
state-of-the-art modular building solutions that are relocatable, adjustable, and expandable.
Efficient Facility Expansion: Modular Offices, In-plant Buildings & External Structures
Elevate your workplace with our Modular Offices, Prefabricated In-plant Buildings, and Exterior Steel Structures. These solutions from our partners at Panel Built offer a rapid, cost-effective way to expand your existing facility. Ideal for growing businesses and warehouses, these modular structures provide customizable, secure, and efficient spaces for various applications.
Invest in modular building solutions to optimize your workspace without the need for expensive buildouts or relocations, ensuring a productive and adaptable environment.
- Customizable Designs: Tailored to fit your specific space requirements.
- Fast & Efficient Installation: Prefabricated for quick on-site assembly.
- Enhanced Durability: Built to withstand harsh industrial and military environments.
- Adaptable for Future Needs: Easily reconfigured, relocated, or expanded as needed.
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Interior Modular Offices and In-Plant Buildings
Revolutionize your workspace with Modular Offices and Inplant Buildings by Panel Built and PortaFab. These cost-effective and versatile modular structures are perfect for creating or expanding office spaces swiftly. Designed to adapt to your evolving business needs, they offer a practical alternative to traditional construction. Whether you need a simple modular in plant office or a multi-story modular warehouse office, our prefabricated designs offer unmatched versatility and minimal on-site disruption. Modular offices are perfect for supervisor spaces, break rooms, conference rooms, cleanrooms and more.
- Cost-Effective Alternative: Lower labor costs, faster build times, and reduced material waste.
- Reduces On-Site Disruption: Prefabricated components minimize construction impact.
- Ideal for Industrial & Commercial Use: Perfect for manufacturing, warehousing, and office settings.
- Enhanced Safety & Compliance: Built to meet local, state, and federal building codes.
Interiors: Indoor Modular Offices, Walls, and More

Modular Offices
Modular offices provide a fast, efficient, and affordable solution for quiet, comfortable workspaces within your existing facility: manufacturing floors, warehouses & commercial environments.

Inplant Buildings
Need a fast, reliable workspace without the hassle of traditional construction? Our modular offices are built for industrial and commercial environments, offering quick installation and lasting durability.

Multi-story Offices
Whether you need a simple prefab unit or a fully customized multi-story setup with HVAC and electrical integration, we provide solutions that grow with your business. Ask about our window options.

Offices with Mezzanine
We help our customers solve limited usable space. This solution pairs modular offices and steel mezzanines together to increase the amount of usable space in any facility.

Modular Wall Systems
Modular wall system offers a flexible and efficient way to create prefabricated walls for offices, enclosures, and workspace partitions. Designed for quick installation and can be easily reconfigured.

Warehouse Break Rooms
A quick and cost-effective solution for adding dedicated employee rest areas to warehouses, manufacturing plants, and industrial facilities. Designed for fast installation with minimal disruption.

Prefabricated Meeting Room
A fast and efficient way to add private meeting spaces to busy warehouses, manufacturing plants, or office environments. Professional, quiet spaces where you need them most.

Quick Ship Offices
Changes in your business can result in the need for additional space to house the growing number of employees. We offer a standard version of our inplant modular offices for fast shipping to your facility.

Cleanroom Systems
Panel Built manufactures modular cleanrooms designed to meet ISO Class 1-100,000 standards, offering custom configurations, seamless installation, and scalable expansion options.
Versatile Modular In-Plant Buildings
In-plant offices from Panel Built or PortaFab can accommodate any space need. Available in a variety of cores and surface finishes, these versatile structures go up in a fraction of the time and cost of traditional “stick-built” construction.
Applications:
- Manufacturing & Industrial Offices
- Educational Institutions
- Healthcare & Laboratory Settings
- Warehouse & Factory Offices
- Shipping and Receiving Offices
- Commercial & Corporate Offices
- Government & Military Facilities
- Break Rooms, Supervisor Offices, and Training Spaces
- Quality Control Labs







Indoor Modular Offices & Buildings
Our modular offices and pre-fabricated interior buildings from Panel Built & PortaFab are designed for a variety of industrial environments and applications, offering quick installation and lasting durability.
Modular Office Construction
In-Plant Office on Mezzanine
Quick Ship Buildings
Conference Rooms
Modular Cleanrooms
Two Story Modular Offices
Fire & Sound Wall Panels
Office Under Mezzanine
Exteriors: Outdoor Prefab Buildings, Steel Structures, and More

Exterior Buildings
High-quality prefabricated buildings, offering fast space solutions for commercial, industrial, and government applications. Streamlined installation process with minimal on-site disruption.

Security Booths
Our security guard shacks are designed to enhance safety and security at any facility, available in standard and custom designs. Ideal for organizations needing quick, reliable security setups.

Ballistic Rated Buildings
Prefabricated protection for high-security applications including military bases, government buildings, and industrial facilities. Heavy-duty welded steel frames and bullet resistant building materials.

Equipment Enclosures
Engineered to protect valuable machinery from the elements and environmental hazards. Ideal for customizable equipment storage buildings that meet safety requirements.

Guard Houses
Quick-to-install, durable security structures designed to improve property access control while keeping security teams safe and comfortable. Delivered pre-assembled for fast on-site setup.

Ticket & Attendant Booths
Prefabricated, durable ticket & attendant booths designed for fast installation and long-term durability. Perfect for theme parks, stadiums, parking lots, event venues and more.

Welded Steel Buildings
A rugged, long-lasting solution for industrial, commercial, and high-security applications. Designed for extreme durability and maximum flexibility, these are custom-built to meet your needs.

Observation Towers
Designed for military, industrial, and commercial applications. Our prefab towers provide high visibility, safety, and durability, ideal for surveillance, tactical training, and elevated control stations.

E-Houses
Electrical buildings are built to exact specifications, offering flexibility in layout, materials, and integration with electrical infrastructure. We manufacture welded steel-frame and panelized wall systems.

Scale Houses
Scale houses are designed to support accurate and secure vehicle weighing operations. Compact truck scale house, a vehicle checkpoint shelter, or a full-featured scale building.
Exterior Buildings & Structures
These prefabricated buildings and heavy-duty structures are built with steel frames and insulated panels to withstand extreme weather and ensure long-term durability with minimal maintenance. Designed for commercial, industrial, and government applications, our structures serve as offices, security booths, guard shacks, and equipment enclosures, providing secure, weather-resistant solutions.
- Fast & Convenient Installation: Delivered fully assembled or in modular components.
- Custom Designs Available: Options for HVAC, restrooms, workstations, and advanced security features.
- Adaptable for Any Industry: Ideal for commercial, industrial, military, and educational facilities.
- Durable & Code-Compliant: Built to meet ADA, state, and local building codes.
Outdoor Modular Buildings & Prefab Structures
Our modular booths, steel towers, and pre-fabricated buildings from Panel Built & PortaFab are designed for a variety of external environments and applications, offering quick installation and lasting durability.
Military Tower
Pre-Assembled Guard Booths
Rappel Tower
Welded Steel Toll Booths
Welded Guard Booth
Raised Exterior Operators
Portable Buildings & Booths
Prefabricated Guard House
Customization Options:
- Layout and Configuration: Constructed to precise dimensions, within a 1/4" tolerance. Include options like counter space, shelving, load-bearing storage roofs, and mezzanines.
- Colors and Finishes: Choose from various colors for wall panels (like white, gray, or champagne) and a wide array of interior and exterior surface materials.
- Climate Control: Select insulation levels to meet your facility's requirements. Incorporate HVAC systems with various heating and cooling levels to maintain a specific temperature and humidity.
- Doors and Windows: 20-gauge steel doors, optional window inserts, or sliding and roll-up doors. Opt for fire-rated or ballistic-rated walls, windows, and doors to enhance protection.
- Wall Panels: Variety of materials like expanded polystyrene, resin-impregnated honeycomb, or fire-rated steel with mineral wool. Add sound-deadening materials for environments requiring noise control.
- Electrical Packages: Get pre-wired junction boxes, breaker panels, outlets, and LED lighting.
Modular Construction Customizations
Unlike traditional construction, our modular approach enables faster lead times, lower installation costs, and efficient on-site assembly with minimal disruption. Fully customizable with HVAC, electrical systems, and security enhancements, our code compliant buildings offer a cost-effective, high quality solution for both temporary and permanent expansions.
Modular Substations
Panel Built designs custom substation enclosures for sensitive electrical equipment using either traditional wall panels or heavy-duty welded steel frames. Delivered pre-assembled or as ‘knock down’ kits for on-site assembly, each enclosure is tailored to your specific needs.
Panel Built Substation Benefits:
- Custom layouts, materials, and configurations to incorporate specialty substation equipment
- Integrated security solutions (card readers, keyfobs, number pads, etc.) including exterior lighting
- Adaptable exterior design to match existing aesthetic
- Weatherproof envelope – engineered to state/local building requirements



Control House
Industrial environments are noisy, which can harm workers’ health over time. Panel Built’s Control Houses provide quiet, comfortable, and regulated areas, shielding from external hazards. Easily installed without workplace disruption, these rooms serve as priority offices or spaces to control machinery and traffic.
Additional Comfort and Security Options:
- Sound-dampening panels
- Additional climate control and HVAC options
- Special HVAC safety systems such as chemical filters, gas alarms, and ballistic proofing.



E-House
Panel Built’s E-Houses provide a secure, modular solution for housing sensitive electrical equipment like switchgears and automation cabinets. These substations offer faster lead times, extensive customization, and lower risk compared to traditional construction. For existing on-site equipment, we can install floorless, steel-framed stations or use our panelized wall system for enclosure.
Standard Options:
- Heavy-duty, ballistic-rated wall systems
- Color choices to complement or match existing architecture
- Specialty integration of custom doors, HVAC, lighting, security, and communication products.
- Shed, gable, and hip roofs available



Stairs/Rails
Complete your building setup with our top-quality Stairs and Starrguard Safety Rails. Complying with international building codes, these additions are essential for ensuring safety in multi-level structures and various industrial applications.
- Starrguard Safety Rail : Robust protection with 11-gauge steel and modular design.
- Versatile Applications : Ideal for offices, mezzanines, and more.
- Easy Installation : Modular components for hassle-free setup and adjustments.
- Efficient Logistics : Streamlined delivery and installation process.








Custom Products
Modular construction offers a variety of building options from large exteriors to small in-plant offices. Sometimes the standard modular building is not enough to fit a specific business need. Panel Built offers many custom options to accommodate different construction variations.
Applications:
- Vestibules
- Bus Shelters
- Jail Cells
- Containers
- Canopies







Learn more about Our modular building solutions.
Fill out the form below or call 1-800-696-3453 to expand your industrial workspace.

Modular Offices, Walls, and Buildings – FAQs
Prefabricated, reconfigurable building solutions that create offices, partitions, and enclosures inside warehouses or facilities.
Modular builds are faster, less expensive, tax-advantaged, and easily reconfigurable compared to traditional construction.
Warehouses, distribution centers, factories, and labs.
Yes. Systems are engineered for fire ratings, soundproofing, and local code compliance.
Absolutely. Units are designed to support climate control, lighting, and IT infrastructure.