12x20 black garage with white garage and side door with black metal roof in South Dakota

12×20 Prefab Garages

Discover the Ultimate 12×20 Garage Solution

With 240 square feet inside, our 12×20 prefab garages deliver dependable protection for your car, tools, or any gear and equipment. All of this plus enough space to double as a work or hangout space. With reinforced flooring and tough, all-season siding keep everything secure. These cleanly designed garages fits just about anywhere.

Typical Price Range: $9.060 – $19,648
Square Footage: 240 sq. ft.
Popular Uses: Parking, storage, home gyms, workshops, hobby rooms, remote offices, or even converting into guest suites.

Customize your layout, choose your finishes, and get your garage build started.

View Our Garage Models

Design A 12×20 Garage

12×20 Prefab Garage Sizes For sale In SD

12×20 garages are a more unique shed size. So, current in-stock inventory may vary and not be shown below.
If none are currently available, create your 12×20 garage using our 3D builder, check out other available inventory, or explore our other shed sizes.

View Entire Inventory

Design A Garage

Our 12×20 Storage Buildings Options

12x20 Light Clay (Taupe) shed with burnished slate steel metal roof for sale in SD

12×20 Storage Sheds

Whether you’re clearing out clutter or needing space to create, our 12×20 sheds gives you the room to make it happen. Choose the Modern Studio for its clean lines and bold looks, or opt for the Southern Classic with its more traditional feel. Add interior finishing like shelving or add extra windows, and with your choice of door type. You get to build it exactly how you need it to be.

View Our Storage Sheds

12x20 log sided cabin shell with black metal roof in South Dakota

12×20 Cabin Sheds

From weekend retreats to cabin backyard studios, our 12×20 cabin sheds offer just the right footprint for personal spaces designed for a purpose. Pick the High Barn if you want an open feel with tall ceilings and bright light, or go with the Gable Cabin for a more rugged, classic profile. Add your own custom finishing touches inside and make it your own from day one.

View Our Cabin Sheds

12x20 Sandy Ridge Tan Garage with white garage door and white side door, brown trim and matching brown steel metal roof in South Dakota

12×20 Garages

Our 12×20 garages gives you secure, ready for any weather spaces to store vehicles, any gear or equipment, or where your next DIY or hobby project come to life. Stick with the straightforward A-Frame for clean utility, or choose the High Barn if you want extra lofted overhead storage options. Outfit its interior as a workshop, gym, studio, or home office. It’s your blank canvas to shape.

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12x20 Driftwood grey garage with white garage and side door, and matching grey steel metal roof in South Dakota

Rent-To-Own 12×20 Garages

Explore the benefits of using the Rent-To-Own (RTO) program:

No Credit Check: Accessible and hassle-free, with no credit requirements to qualify.
Early Purchase Option: Own your garage sooner by paying off your balance at any time.
Easy Cancellation: Enjoy flexibility with the option to cancel anytime, free from long-term commitments.

The RTO program makes owning your garage simple and stress-free!

Learn More About RTO

Custom 12×20 Garages

Design Your Dream Garage with Our 3D Builder!

Select Your Style and Layout: Start with a 12×20 portable garage model that fits your liking. Design it for storing gear, add in a workspace, or setting up for shelving for hobbies.
Add the Details That Matter: Choose the windows and doors that work for you. Personalize your garage with features that match your vision for how you’ll use it.
Choose Build to Last Siding & Roofing: Select from durable, weather-resistant siding options, and complete the look with either a metal or shingle roof.

Ready to get started? Open the 3D builder and begin creating your custom 12×20 garage today!

Design A Custom Garage

12×20 Garage Siding Options

12x20 Gibraltar blue garage with white garage and side door, white trim and steel metal roof in South Dakota

12×20 Wood Garages

With its natural wood look and solid construction, our 12×20 wood garages deliver reliable function with a warm, traditional feel. Use it to park your vehicle, ATVs or UTVs, set up a home office, build out a gym, or create a dedicated space to work on DIY or hobby projects. It’s a practical, good-looking addition to any backyard.

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12x20 Red-Barn High barn Metal Garage with white garage door, side door, and white steel metal roofing

12×20 Metal Garages

Designed for strength and low-maintenance use, our 12×20 metal garages hold up in every season. With quality framing, solid metal siding, and a durable metal roof, it’s a smart choice for storing vehicles, housing tools and equipment, or setting up a dedicated home office or workspace. It adds real long-lasting function to your property, and looks pristine doing it.

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12×20 prefab Garages: Frequently Asked Questions

In South Dakota, structures exceeding 120 square feet (a 12×20 prefab garage is 240 square feet) typically require a building permit. Similar regulations apply in Nebraska and Iowa. To ensure compliance with local codes, it’s advisable to contact your local building department. If you have any questions, feel free to reach out!

With 240 square feet of space inside, our 12×20 garages provide room to park a full-size car or small truck, while also offering extra storage for bikes, tools, and yard equipment. All while still having space left for cabinets or shelves. Want to turn it into a workshop, gym, or creative zone? It’s sized right for workbenches, tools, and gear, as well as whatever else you need to get to work.

A strong foundation is key to the life and performance of your 12×20 prefab garage. A 4–6 inch layer of crushed stone makes a great gravel base, helping with drainage and surface stability. For heavier builds, a concrete slab delivers long-term support. If your site isn’t level, pier and beam or block-style foundations are effective in keeping everything secure. For full details, refer to our foundation preparation guide and consult with a contractor before installation.

A 12×20 garage typically costs between $9.060 and $19,648, depending on the model, siding, and custom features you choose. Whatever your budget, you can design a garage that perfectly fits your style and needs!

Read Our Customer Reviews

    
 
 
       Posted on Google  
   
   D E 
 
 
 
 Trustindex verifies that the original source of the review is Google. I ordered the 8x12 shed.  QSB provided assistance with the design layout (window location, paint info, etc.) and returned all my calls and emails promptly.  The design program on their website is easy to use.  The shed was built and stored at their site until I was ready for delivery - which helped me stage the installation time.  The shed was exactly as described and has excellent construction with good attention to details.  The price was fair and reasonable.  Delivery was on time and the  installation was professional and properly completed.  The people at QSB were very friendly, professional and easy to work with.  I'm 100% satisfied and I highly recommend them!
  
 
      Posted on Google  
   
   Chad Collins 
 
 
 
 Trustindex verifies that the original source of the review is Google. Quality built buildings, good prices, was impressed with the 16 x 32 Shop, no problem with getting a bigger door to put my 4x4 in, friendly staff, they will custom build to what you need,
  
 
      Posted on Google  
   
   Colin Varilek 
 
 
 
 Trustindex verifies that the original source of the review is Google. The people at Quality sheds know what they are doing ! Great group to deal with ! And the delivery and set up was done so fast and professional! They make it look easy!  If anyone has the need for a new shed it's worth every penny the go to Quality sheds of Alexandria South Dakota
Thanks very much Colin and Lisa!!
  
 
      Posted on Google  
   
   Kayla Matthews 
 
 
 
 Trustindex verifies that the original source of the review is Google. We ordered a custom shed last fall, communication with the team was excellent throughout the process and the shed was ready for delivery a little over a month- month and a half later. The delivery and setup process was smooth and we were very happy with our shed once delivered, quality seemed fantastic, and I don't think I could've built one better myself.
Now it's been a little over a year, and I had neglected writing a review before now but thought I finally should because our shed recently withstood 100mph winds with no damage whatsoever. The ground anchors held strong and the metal roof remains intact, and I can't say the same for a lot of metal roofs around where I live after the storm. We are very happy with how it has held up, given the weather we get out in the plains. I would 100% recommend if your looking for a shed in South Dakota!
  
 
      Posted on Google  
   
   Gary Myers 
 
 
 
 Trustindex verifies that the original source of the review is Google. Could not be more happy with the whole process! Ordered a custom size and color and it turned out perfect. Guys were very easy to work with and it was ready a week earlier than expected. Quality is phenomenal, don't waste your money on a premade box store shed, get one of these. Delivery and set up took only about 1/2 hour and was perfect. Thank you!
  
 
      Posted on Google  
   
   Alyssa 
 
 
 
 Trustindex verifies that the original source of the review is Google. A great family-run business. They designed and built the shed with attention to quality and durability. Overall the process was easy, fast, and fair priced. Now my first choice for any storage company. Would recommend highly.
  
 
      Posted on Google  
   
   Tyler 
 
 
 
 Trustindex verifies that the original source of the review is Google. Highly recommend. Good shed for a very fair price. Great delivery service, will recommend to anyone needing a shed. Stan the driver precisely drove the shed through my narrow fence opening and then leveled it with precision. If you need a shed give them a call.
  
 
      Posted on Google  
   
   Carson 
 
 
 
 Trustindex verifies that the original source of the review is Google. My family has two of their sheds and they are great!!! The salesman is so helpful and the delivery driver was so fast and nice.  10/10 would buy again.

D E

I ordered the 8x12 shed. QSB provided assistance with the design layout (window location, paint info, etc.) and returned all my calls and emails promptly. The design program on their website is easy to use. The shed was built and stored at their site until I was ready for delivery - which helped me stage the installation time. The shed was exactly as described and has excellent construction with good attention to details. The price was fair and reasonable. Delivery was on time and the installation was professional and properly completed. The people at QSB were very friendly, professional and easy to work with. I'm 100% satisfied and I highly recommend them!

Chad Collins

Quality built buildings, good prices, was impressed with the 16 x 32 Shop, no problem with getting a bigger door to put my 4x4 in, friendly staff, they will custom build to what you need,

Colin Varilek

The people at Quality sheds know what they are doing ! Great group to deal with ! And the delivery and set up was done so fast and professional! They make it look easy! If anyone has the need for a new shed it's worth every penny the go to Quality sheds of Alexandria South Dakota Thanks very much Colin and Lisa!!

Kayla Matthews

We ordered a custom shed last fall, communication with the team was excellent throughout the process and the shed was ready for delivery a little over a month- month and a half later. The delivery and setup process was smooth and we were very happy with our shed once delivered, quality seemed fantastic, and I don't think I could've built one better myself. Now it's been a little over a year, and I had neglected writing a review before now but thought I finally should because our shed recently withstood 100mph winds with no damage whatsoever. The ground anchors held strong and the metal roof remains intact, and I can't say the same for a lot of metal roofs around where I live after the storm. We are very happy with how it has held up, given the weather we get out in the plains. I would 100% recommend if your looking for a shed in South Dakota!

Gary Myers

Could not be more happy with the whole process! Ordered a custom size and color and it turned out perfect. Guys were very easy to work with and it was ready a week earlier than expected. Quality is phenomenal, don't waste your money on a premade box store shed, get one of these. Delivery and set up took only about 1/2 hour and was perfect. Thank you!

Alyssa

A great family-run business. They designed and built the shed with attention to quality and durability. Overall the process was easy, fast, and fair priced. Now my first choice for any storage company. Would recommend highly.

Tyler

Highly recommend. Good shed for a very fair price. Great delivery service, will recommend to anyone needing a shed. Stan the driver precisely drove the shed through my narrow fence opening and then leveled it with precision. If you need a shed give them a call.

Carson

My family has two of their sheds and they are great!!! The salesman is so helpful and the delivery driver was so fast and nice. 10/10 would buy again.