Traditional construction is not always the best option when expanding your industrial warehouse or factory workspace. Building a new room from scratch can be time-consuming and expensive, especially if you need building permits and hire contractors. However, modular inplant offices offer a solution that is both affordable and efficient. To see more industrial storage solutions, view our market page.

This article will discuss the following:

  • Benefits of modular inplant offices (also called in-plant offices)
  • Prefab modular office features
  • What is an inplant office?
  • The inplant office installation process

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Benefits of Modular Inplant Offices

Easy Installation

mezzanine inplant office

One of the main advantages of modular construction is its easy installation. Compared to traditional construction, which can take weeks or even months, prefabricated offices install in a day or two.

The installation process is also less disruptive to your business operations. There is no need for building permits or construction hassles, as the offices are anchored to the floor and come with a drop-in ceiling. This means you can have your new office up and running in no time without any significant disruptions to your workflow.

Note: Since modular office permit requirements vary from place to place, it’s always best to check with your local officials before starting construction. This way, you can be confident in following all the correct requirements and procedures.


The prefabricated warehouse offices are modular, which provides convenient flexibility. Since they are not a permanent installation, the in-plant offices relocate whenever you redesign or renovate your warehouse. These modular offices are also scalable due to their universal components. With a modular in-plant office, you can always have the office space you need exactly where you need it.

Controlled Space

prefabricated warehouse offices mezzanineIn a busy, noisy warehouse, an inplant office provides a quiet space suitable for office work, phone calls, lunch breaks, and more. Modular inplant offices can be installed near production areas, facilitating better communication between supervisors or other departments and the production workers. With soundproof panels, insulation, electrical wiring, and HVAC, an inplant office provides a comfortable, quiet workspace in even the busiest facilities. 


Modular inplant offices are customizable to your specific needs. These offices come in various sizes and configurations, so you can choose the one that best fits your workspace. In addition, they can be tailored to fit your unique specifications, including the number of doors and windows, electrical outlets, and HVAC systems. This allows you to create an office space tailored to your needs without compromising functionality or design.

Cost Effectiveness

Modular inplant offices are a cost-effective solution for expanding your existing facilities. Traditional construction can be expensive, with materials, labor, and permits adding up quickly. Modular offices, on the other hand, are prefabricated and designed to be assembled quickly and efficiently. This means that you can save money on labor costs and avoid the need for building permits.

prefabricated warehouse officesAdditionally, modular office systems are built to last, with durable materials that can withstand heavy use and frequent relocation. Plus, they have an accelerated tax depreciation in comparison with new construction.

Prefab Modular Office Features

We provide several prefab offices in a wide range of dimensions, including models with two, three, or four walls. Standard features for prefab modular offices include the following:

  • 3″ thick walls constructed of modular gypsum panels with a polystyrene core, reinforced with painted steel frames, and then vinyl-covered
  • Vinyl base molding for wall interiors and exteriors
  • Wall panels are fire- and soundproof
  • Doors (3’W x 7’H) made of 20-gauge steel with locks and ¼” clear tempered safety glass window
  • Corrugated steel roof cover with support angles
  • Drop-in ceiling using mineral fiberboard with white steel grid system and 6″ Fiberglass insulation
  • Electrical components include fluorescent (4-bulb) light fixtures, duplex electrical outlets, a light switch, and a circuit breaker box
  • Windows and HVAC optional

What is an In-plant Office?

An in-plant office is a modular panel-built office building installed into an existing space, such as a warehouse, factory, or manufacturing facility. In-plant offices are an ideal solution for a break room, storage area, shipping office, work area, observation area for supervisors, and more.

Modular inplant offices can be single-story or multi-story, and they can also be installed on mezzanines. You can order a prefabricated office kit or have an inplant office custom-designed to meet your requirements. For more information, check out our inplant office frequently asked questions here.

The Inplant Office Installation Process

inplant office

Installing a modular in-plant office is quick, often in as little as a day. An overview of the installation process is as follows:

  1. Floor tracks are installed and anchored to the floor, marking off the perimeter of the building.
  2. Stud posts for the walls are preassembled.
  3. Walls are erected, with modular panels fitted into the floor tracks and stud posts and secured with cornice molds on top. Window panels are inserted as needed.
  4. Dust cover decking is installed across the top of the building.
  5. The steel door is installed into the frame.
  6. Electrical wiring is installed through the studs (note that electrical or communication lines can be added at any time during or after installation without the need for additional stud components).
  7. The acoustic ceiling is installed.
  8. A vinyl base is added along the wall panels.

Visit our online store for more details on the prefabricated warehouse offices we offer. Our specialists can also help you design a custom in-plant office to meet your unique specifications and lead times.

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Contact Us for Modular Inplant Offices

Southwest Solutions Group® provides design and installation services for modular offices for warehouses and other facilities. We will also provide a free consultation to determine your needs and specifications before the design begins. To learn more or to speak with a specialist, call us at 1-800-803-1083 or send us a message today.



Industrial Testimonials


“Working with Southwest Solutions including Matt, Susan, and especially Brad was great. They provide amazing customer service. Brad and the install team were especially great. Very professional, easy to work with, and did the work quickly and very well with very little input from us. If we need help with carousel storage moves, parts, or new equipment we will start with Southwest Solutions. ”

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“The team at Southwest Solutions were nothing short of fantastic. First meeting with Craig, I received a customized design, in person, based on my office needs while still maintaining an efficient layout and being cost effective. Craig explained everything clearly, allowing me to understand that as modular mill-work, I would be able to move it if I ever changed offices, but without the added sales pressure to immediately make a decision. Once I had decided, I worked with Chris who assisted in picking out the finishes and scheduling the delivery and installation. The professionalism of Craig and Chris spoke volumes and I would highly recommend anyone looking to transform or fit-out an office to contact Southwest Solutions.”

Etihad Airways
Harvey-Cleary Builders

“I want to let you know that we all really appreciated your team mentality, professionalism and dedication shown on this project. It was a pleasure working with you and your office and we look forward to many more. Please pass along my gratitude to everyone who worked on this project. Thanks! ”

Harvey-Cleary Builders
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“I just want to take a minute to let you know how good of a job your install crew did yesterday. They were quick, fast, courteous and very consensus during the install. They were awesome to say the least. Being in the service business ourselves, we know that you can never hear the words “Good Job” often enough. Please pass this along to your crew.”
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