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Modular Office Buildings

How Much Office Space Do I Need? Modular Office Space Requirements Guide

Sep 17, 2025
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When it's time to expand your workspace, modular office buildings are a smart choice, providing a quick and affordable path to a larger work environment. Learn more about modular office space requirements and how BOXX Modular can help you solve your space issues.

Key Takeaways

  • Modular office spaces are highly flexible and can be designed to fit your needs, from open workstations to private offices.
  • Modular office space requirements vary widely based on your company's size, industry, and workflow.
  • An experienced modular provider, like BOXX Modular, can help you determine the best size and layout for a functional, cost-effective space.
How Much Office Space Do I Need?

How Much Office Space Do I Need?

The key to a successful expansion is understanding your spatial needs. With modular dimensions available in a wide range of sizes, from a few hundred to over twenty thousand square feet, selecting the right size is crucial. 

The modular office space requirements for your business are based on your layout and the number of employees. To help you determine this, we've broken down three different office size standards based on common needs.

Spacious

(250-500 sq. ft. per employee)

This size works well for companies that prioritize privacy and large individual workspaces, such as law firms, where most of the space is dedicated to private or executive offices.

Average

(150-250 sq. ft. per employee)

This is a versatile option for offices that blend different types of workspaces, including cubicles and private offices with shared, open areas.

Dense

(80-150 sq. ft. per employee)

Best suited for businesses that thrive on a collaborative, open-office environment with rows of desks, like call centers, as it makes the most of available space.

Additional Office Necessities

When determining modular office space requirements, remember to account for common areas in addition to individual workspaces. Below, we’ve broken down typical office necessities you may want to consider in your floor plan. 

  •  Reception: 100 sq. ft. + 10 sq. ft. per person waiting
  •  Conference Room: 50 sq. ft. + 20-25 sq. ft. per seat
  •  File Room: 125-300 sq. ft.
  •  Break Room: 120 sq. ft.
  •  Restrooms: 55 sq. ft. for the first stall + 30 sq. ft. for each additional stall
  • Hallways/Corridors: add 20-30% of your total usable space

A key benefit of partnering with BOXX Modular is access to our add-on packages. These allow you to furnish your modular office space and common areas with ease, so your space is ready when you need it. Some of our packages include:

Desk, swivel chair, chair mat, 2 guest chairs, and a waste basket.

8' table, and 8 conference chairs.

8' table, and 8 swivel chairs.

Built-in countertop, file cabinet, and a plan table.

Microwave, coffee maker, water cooler, full-size fridge, and a garbage can.

We will help you determine which stairs or entryway you need for your particular project (1-5 steps, two-story stairs, and/or canopy, etc.).

3 Types of Modular Office Spaces

With BOXX Modular, you get high-quality modular office spaces that are clean, affordable, and well-maintained. Our dedicated team ensures every building is in excellent condition and meets your modular office space requirements. 

To find the right fit for you, browse our modular office space dimensions below or speak with an expert about our available rental, purchase, used, and custom options.

1. Mobile Offices

Need a quick and easy solution for temporary modular office spaces? Our mobile offices are perfect for construction sites, offices, hospitals, events—you name it. You can even add a convenient furniture package, so your new space is ready to go the moment it's installed.

  • 10’ x 36’
  • 360 sq. ft.

  • 12’ x 46’
  • 552 sq. ft.

  • 12’ x 56’ 
  • 672 sq. ft.
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Browse Mobile Offices
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Browse Office Complexes

2. Office Complexes

With modular dimensions ranging from 1,000 to over 30,000 square feet, our BOXXPlex office complexes are code-compliant, American-made, and can be configured with private offices, restrooms, conference rooms, and open workspaces.

  • 24’ x 56’ 
  • 1,344 sq. ft.

  • 36’ x 56’ 
  • 2,016 sq. ft.

  • 48’ 56’ 
  • 2,688 sq. ft.

  • 60’ x 56’
  • 3,360 sq. ft.

  • 72’ x 56’ 
  • 4,032 sq. ft.

  • 84’ x 56’ 
  • 4,074 sq. ft.

  • 96’ x 56’ 
  • 5,376 sq. ft.

  • 108’ x 56’ 
  • 6,048 sq. ft.

3. Custom Modular Office Spaces

Like our other modular solutions, our custom prefab buildings are constructed off-site in sections, then delivered and installed at your facility. We work closely with you to understand your modular office space needs to provide a comprehensive, cost-effective solution that meets your modular office space requirements.

  • 42’ 60’
  • 2,520 sq. ft.

  • 56’ x 60’
  • 2,760 sq. ft.

  • 60’ x 82’ 
  • 4,920 sq. ft.

  • 84’ x 120’
  • 10,080 sq. ft.

  • 60’ x 84’
  • 5,040 sq. ft.

  • 60’ x 82’ 
  • 4,4920 sq. ft.
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Browse Custom Modular Office Spaces

What If I Want to Expand My Office in the Future?

When choosing the right size for your modular office space, don't forget to think about future growth. While you don't want to invest in a lot of empty space that will go unused for years, you also don't want a building that will be too small for your team down the line. 

Consider asking yourself the following questions to help you determine how much additional space to incorporate into your modular office space requirements and original floor plan.

  • How many employees will I add over the next few years?
  • How quickly will I be hiring them?
  • What positions will they hold?

Expanding your operations with a modular office space offers a significant advantage. Because these new spaces are constructed off-site and delivered up to 90% complete, you can seamlessly add new modules to your current building without interrupting your team's daily productivity.

Our BOXXPlex office complexes are the ideal solution for businesses that require additional space to accommodate changing or expanding operations. Depending on your needs, we can easily add or remove sections. 

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Have Questions? Get Answers.

We know there are many misconceptions surrounding modular solutions, and if you’re not familiar with the processes, you likely have some questions. Continue reading to discover answers to frequently asked questions about our modular buildings.

At BOXX Modular, we offer both permanent and temporary modular buildings—each built with high-quality materials and a commitment to environmentally conscious practices. While temporary modular buildings effectively address short-term needs, permanent modular construction provides durable solutions for long-term requirements. 

Your business has distinct needs, and BOXX is equipped to meet them. We provide options for customizing your modular building, including size, appearance, layout, and materials, ensuring a solution that's uniquely yours. If you have a specific floor plan in mind, let us know, and we’ll work with you to meet your exact specifications.

With consistent upkeep, temporary modular buildings can reliably serve their purpose for 25 to 30 years. Furthermore, permanent modular buildings offer a lifespan comparable to conventionally constructed buildings, often lasting 35, 50, or even more years. 

Interested in learning more?

See how our solutions can exceed your modular office space needs.

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Ready to solve your space needs?

Modular buildings are the way to go. Request a quote or contact us today to get the conversation started. We’d love to talk to you about how modular can meet — and exceed — your needs.

1 877 966 7839
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