30x100 metal building
© Maverick Steel

A 30×100 metal building offers 3,000 square feet of interior space, making it a versatile building size that can be used for a variety of purposes. But how much does a building of this size cost? What factors affect the cost of the building?

30 x 100 Price Range

The cost of a 30×100 building will vary greatly, depending on the options you choose and how much work needs to be done to finish it.

On average, the cost of a metal building ranges from:

  • $10-$25 per square foot

At this rate, the cost of the building can range from $30,000-$75,000.

30 x 100 Concrete Slab Costs

Along with the cost of the building itself, you will also need to consider the cost of pouring a concrete slab. The building will need a foundation, and a slab is the most popular choice.

The cost can vary greatly, depending on your location, your site and other factors. However, the average cost of a concrete slab is:

  • $4-$8 per square foot

For a 30×100 building, the cost of the foundation will range from $12,000 and $24,000.

How is a 30×100 Price Calculated?

You know the cost of a 30×100 building and the slab, but what factors affect these costs? How is the price of this building calculated?

Options and Customization

One of the biggest factors that affects the cost of a 30×100 building is the options you choose and the customizations you want.

The more options and customizations you choose, the higher the cost will be. Things like extra doors, windows and architectural features will increase the price tag of your building.


Your location will also affect the cost of your building. If you live in a cold climate or area that gets high winds, the building must be constructed to withstand these elements. This will add to the cost of the structure.

Foundation Type

Concrete slabs are the most common foundation choices for metal buildings, but you may choose a different type of foundation for your structure. A different type of foundation may cost more.

Extra Features and Finishes

If you want any additional features or finishes, that will add to the cost of the structure. For example, if you want to use the building as a home, finishes like granite countertops will increase the overall cost of the project.

Utilities and Land Work

If you plan to run electricity or connect water and sewer, this will add to the cost, as will any clearing or grading that must be done before the building is erected.

30 x 100 Metal Building Uses

Metal buildings can be used in a variety of applications, especially buildings that are 30 x 100 in size. Some of the many uses for these buildings include:

Mini Storage Units

30×100 is one of the most common sizes for mini storage units.


One of the most common uses for 30 x 100 metal buildings is for agricultural purposes. Farms can use buildings of this size for:

  • Grain and feed storage
  • Livestock housing
  • Storage of agricultural products
  • Equipment storage

Metal buildings of this size will provide plenty of space for agricultural operations of most sizes.

Manufacturing or Warehousing

A 3,000 square foot building can also be used for manufacturing or warehousing operations. Clearspan buildings of this size provide plenty of open and unobstructed space, which makes them ideal for these types of operations.

Office Space

A 30×100 building is a great option for office space, particularly if you can add loft space. Interiors can be insulated, wiring can be added, and HVAC systems can be installed.

Interior partitioning systems can be installed to create multiple offices, or the space can be used for open working. There are many metal building office floor plans to choose from, giving you so much more freedom when it comes to the office’s function and design compared to a stick-built office.

Retail Space

A 30×100 building is a great option for a small retail store. For boutiques or specialty shops, a building of this size will provide open space, durability and easy maintenance. The advantages of a metal building allow the shop owner to save on operation costs.

A steel building storefront can be attractive to customers and will offer many benefits over the long run.


A 30×100 metal building can also be used as a home. With 3,000 square feet of interior space, there is plenty of room for multiple bedrooms, bathrooms and all of the modern amenities you expect to find in a home.

A 30×100 metal building has many uses, and the cost is more affordable than a stick-built structure. Offering durability, easy maintenance and an open interior, a metal building of this size is a smart investment.

Common Sizes & Pricing