Prefab Garages For Sale in Montana

More About Our Prefab Garages

Whether you need a place to store your classic car, place your seasonal yard equipment, or store your family’s ATVs, our portable garage is a great solution. At Montana Structures, we provide you with the high-quality portable garage of your dreams. All of our portable garages come with a 12-year top-to-bottom warranty, letting you rest assured that your belongings will be kept safe for years to come.  Take a look at our sheds below to see what shed serves your needs the best.

Lofted Portable Garage

When it comes to portable garages, the Lofted Barn is our number one seller. This shed offers a loft that goes half the length of your building. This garage can be built to suit the size requirements that you need. What’s more, is your Lofted Portable Garage can have many additional features added to it to make it look just as beautiful as your home.

Utility Portable Garage

If you’re looking for top-notch yet economical portable garage for your car, the Utility Garage is for you. In addition to protecting your car or other belongings, from extremes in weather.  This portable garage is useful for storage or a workshop. Just like all of our other buildings, this portable garage can be customized to meet your needs with options such as a steeper roof, extra windows and doors, and much more. 

The process

How to Get the Perfect Prefab Garage

Design Your Shed

Once you’ve decided to invest in a portable garage, explore our 3D design tool to personalize the portable garage you have chosen. Once your design is complete, you can easily request a quote for your customized portable garage.

Schedule Your Build

Upon receiving the quote request for your portable garage, a team member will reach out to you. We are here to address any inquiries you may have regarding construction time, foundation requirements, or any other topics you wish to discuss. Our aim is to make your experience as smooth and hassle-free as possible!

Use Your Building

Once your order for a portable garage is confirmed and the construction of your garage is complete, the eagerly awaited day arrives – delivery day. Upon arrival, we will carefully position the prefab garage in the designated location and ensure it is leveled correctly. Once securely in place, you can start using your portable garage on the very same day.

Standard Features

for Portable Garages

Standard Build Features

  • 4 x 4 treated skids: 8’W (3), 10’W (5), 12’W (5), 14’W (7)
  • 2 x 4 treated joists 12″ on center
  • Tongue and Groove PerformMax Waterproof Floor
  • 2 x 4 wall framing 16″ on center
  • Keyed door latch & heavy duty hinges
  • Trusses 24″ on center
  • 7/16″ OSB roof sheathing
  • 2 – 8″ x 16″ aluminum air vents (one on each end)
  • Aluminum drip edge on all roof edges

Standard Option Features

  • Painted or Natural Stain
  • 1” x 4” SmartSide or red fir trim
  • 1 – 46”w x 73”h single door on 8’ wide buildings & 60”w x 73”h on all other buildings
  • Choice of 30-year dimensional shingles or 40-year metal roof


  • LP Smart Side with 5/50 Year Warranty
  • 30-40 Year Manufacturer Roof Warranty
  • Our Own 12 year Top to Bottom warranty

Custom Options

Portable Garage add-ons

People love variety, and we recognize that. To accommodate this, we provide a range of add-ons and upgrades for our portable garages. Some of the options include additional windows and doors and even incorporating interior workbenches, shelving, or even floor insulation.

Portable Garage Color Options

The choice of color for your portable garage is pivotal in shaping its overall aesthetic. Delve into our diverse range of colors listed below to find the one that aligns with your taste. Kindly be aware that the appearance of these colors might vary on your screen, so use them as a reference. For a firsthand experience and an accurate representation of these colors, we invite you to visit one of our numerous locations and see them up close in person.


i wish every company worked this way

Communication was perfect, even over holidays. They build superior quality and delivers. We could not be more impressed with shed quality. Great company, great people and quality product – thank you Jon and… Read more “i wish every company worked this way”

Superior, MT

Excellent company and customer service!

On April 9th, I received a call from Titus. He stated that he would be at my house at approximately 0900, he showed up about 0915, at the same time, my bank called me and advised that the other company had attempted to remove the funds for the cancelled barn. Titus backed the barn into… Read more “Excellent company and customer service!”


The Craftsmanship is Exquisite!

We just received delivery of our 12×20 Lofted Barn this morning. We had looked at many different companies and we are so glad we decided on a Griffin Creek Structures building! The craftsmanship is exquisite and the whole process from ordering to delivery was amazing. Jon the representative wanted us to be totally satisfied and he took the time to… Read more “The Craftsmanship is Exquisite!”

Mike and Sheila
Philipsburg, Montana