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Best Barns Greenbriar 12'x20' Wood Garage Barn Kit
Best Barns Greenbriar 12'x20' Wood Garage Barn Kit

Best Barns Greenbriar 12'x20' Wood Garage Barn Kit

Retail Price:$3,199.99
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On sale:$2,679.00
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SKU:Greenbriar1220 by Best Barn Kits

Sturdy Built Truss System
Premium Quality Material
Easy to Follow Instructions
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Best Barn Greenbriar 12' Wood Garage Kit


This 12 x 20 Best Barns shed kit is the perfect single car garage kit! It provides high headroom measuring 7'5". It is possible to add on to this garage kit creating plenty of room for your storage and vehicles. This is the perfect DIY kit. The framing, siding and roof sheathing are precut. The Greenbriar exterior walls are covered with 7/16 OSB board ready for the exterior of the buyers choice. Vinyl, stucco or brick may be applied. The Best Barn wood garage components fit easily into place with no special tools or skills required. For extra strength to the trusses, metal hurricane truss hangers are provided to secure trusses to the exterior walls. All required hardware is included. The building is shown with optional window, cupola, and shutters. Garage door,roof edge, and shingles are provided by the owner. The wood floor is optional.

OPTIONAL STURDY BUILT FLOOR: Choose an optional Sturdy-Built wood floor for your new garage kit. Easy to construct and designed specifically for your building. This floor is designed for buildings incorporating an overhead garage door. A galvanized sill plate is provided with this floor system. The Sturdy-Build floor system comes standard with 3/4" plywood flooring and 2x4 treated floor joists spaced 12". The floor is supported with 4x4 treated runners. Nails are included. The material is not pre-cut. Floor sheathing is not treated.


  • OSB Exterior Sheathing: Pre-cut 7/16" to allow for the application of exterior siding of buyer's choice.
  • Gable overhang to help protect against the elements.
  • Sturdily built truss system with 40 lbs. snow load and 90 mph wind load.
  • 10'7" overall height and 12' foundation width. (foundation length is the same as building length)
  • 7'5" wall height.
  • 24" o.c. wall studs.
  • Premium quality material.
  • Easy to follow instructions.
  • 7-day Technical support
  • Your satisfaction guaranteed!

Please note that these shipments are too large for FedEx and ups and require freight delivery on a semi-truck. The freight company will call you to set up a delivery. Someone will need to be home to sign for it. The freight company will unload it for you curbside.

What are you getting?

Basically, you are getting a quality storage building including the frame, walls, roof, and hardware. Why does it not come with siding, roof shingles, and the garage door? The reason is that customers purchase the storage shed with the intention of matching their home or nearby structures or surroundings. Customers generally like to get the exact same siding that they have on their home, the same roof shingles so they match, and the garage door that matches the style of the homes garage door and the coloring.

Do I need to buy the floor?

You do not need a floor if you are putting this on existing concrete or asphalt (must be level). If you're putting it on gravel, grass, or dirt, you will definitely want the flooring to keep your items up off the dirt and to ensure that assembly goes better with everything fit nicely.

Who assembles this?

Most customers assemble these themselves. But, as kits with the intention that customers/homeowners will put these together themselves. However, sometimes customers hire out part of the assembly or the entire assembly. For example, some customers will build everything included with the kit and then will hire out the siding and the roof shingling by contacting a local siding company and so forth. We have found that a lot of customers are able to find good pricing on assembly when they join a local Facebook classifieds group. Reaching out to a local classifieds group by explaining what you're looking for a handyman or contractor to install the storage shed generally piques interest in people begin tagging people they know that do these construction jobs. That helps weed out the middleman and puts you in touch directly with an installer.

Assembly is not difficult, but it can be time-consuming depending on how many people you have assisting you. The instruction manual is done very well and there is free technical support with top-notch experts who can assist you.

Competitive Edge Products, Inc. is an authorized distributor of Greenbriar Best Barn Kit.

Q: CAN I ORDER OR SEE INSTALLATION GUIDE BEFORE i ORDER GARAGE 12x20 What dimensions necessary for concrete floor? Any pre placed supports?
Asked by: J. - 12/29/2019
A: Absolutely. Please take a look at the instruction tab for these details.
Was this answer helpful?  2 of 2 Customer(s) found this Answer helpful.
Answer provided by:  Customer Service (12/31/2019)
Q: Can this kit be placed on concrete?
Asked by: Robert Allen - 11/2/2018
A: Concrete would make a great foundation for this shed. and would also probably work in place of the optional floor.
Was this answer helpful?  1 of 1 Customer(s) found this Answer helpful.
Answer provided by:  Admin (11/18/2019)
Asked by: M. R. - 8/15/2016
A: These Sheds are meant to be customized. We do not sell the parts to do this, so you would have to either do it yourself, or hire someone to do it. Just make sure you do it correctly and follow all safety regulations.
Was this answer helpful?  3 of 3 Customer(s) found this Answer helpful.
Answer provided by:  Admin (8/23/2016)
Q: Hi. I would like to know if the garage shed comes assembled. can I get it with only one window?
Asked by: Delores B. - 12/13/2015
A: This is a kit. It doesn't come assembled.
Was this answer helpful?  3 of 4 Customer(s) found this Answer helpful.
Answer provided by:  Customer Service (12/15/2015)