Castle Mountain Garage Shed

Castle Mountain Garage for sale in MT

12′ x 20′  starts as low as

$ 12,541.95

Rent-to-own starting at

$ 522.58 a month

Castle Mountain Garage for sale in MT

The Castle Mountain™ Garage is part of our Prestige™ series

These prefab one car garages are designed to offer secure and convenient shelter for your vehicle, protecting it from the element and ensuring its longevity. Whether you’re a homeowner looking to add value to your property or simply seeking additional storage space, prefab one car garages provide a practical solution. Explore our selection of Castle Mountain prefab one car garages for sale in Montana and elevate your property with a functional and attractive addition.

Standard Features


  • 4×4 pressure treated runners
  • 2 skids on 8’ wide buildings
  • 5 skids on 10’ and 12’ side buildings (7 on 14’ and 16’)
  • 3/4″ Tongue and Groove flooring
  • 8″ on center floor joists

Side Walls

  • Framing 16” O/C
  • 7′ 4.5″ wall height
  • LP SmartSiding (50-year warranty)
  • Painted exterior (your choice of color)
  • Contrasting painted trim color included
  • 9×7 Overhead garage door (no double wood door) (1x)
  • House-style door (no glass) (1x)
  • 3′ Steel Man Door (1x)
  • 8”x16” gable vents (2x)
  • 24″x36″ aluminum window (1x)


  • Roofing trusses 16” O/C
  • 40-year metal roof tuff rib
  • Synthetic roof felt


  • 7/12 pitch
  • 6″ overhangs
  • 24″x36″ aluminum windows (2x)
  • House-style door (not on Castle Mountain) (1x)

DESIGN YOUR OWN castle mountain garage

Did you know you can create and customize a 3D model of the prebuilt garage that you want to purchase? Here are a few ways that you can personalize your single-car garage.

Pick A Size

We offer a wide selection of sizes that allow you to pick the perfect-sized single-car garage for your vehicle.


Select any color and material for the interior and exterior walls and the roof of your outdoor prebuilt garage.


Windows come in sizes from 14×21 to 24×36 with aluminum, vinyl, and wood material options. Single, Steel, Dutch, Double, Roll-up, overhead garage doors, and animal shelter openings can be manufactured from fiberglass steel or wood materials and come in various sizes.


Our Castle Mountain single-car garages can be modified into an office or a workshop by customizing and adding basic electric packages, insulation, or structural options such as T&G Flooring or an exterior porch.

Castle mountain garage Delivery

We offer secure and complimentary 50-mile shipping with any building that is custom or from inventory at our over 50 locations in six Northwestern states, including Montana, Idaho, Nebraska, South Dakota, Utah, and Wyoming.