Castle Mountain Garage Shed

Castle Mountain Garage for sale in MT

12′ x 20′  starts as low as

$ 12,321.45

Rent-to-own starting at

$ 513.39 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 delivery services across over 50 locations in six Northwestern states, including Montana, Idaho, Nebraska, South Dakota, Utah, and Wyoming.