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These 20×40 Gable Barn Plans blend traditional good looks with modern ease of construction. This barn design has 1′ overhangs and features a strong roof to resist heavy snow. This barn design also features a 14×30 lean to for tons of extra storage space. Use the extra space for wood storage for your wood shop. Turn it into a nice wood drying kiln, with some clear panels on the roof it can even be a solar powered wood kiln!

gable barn plans post images
gable barn plan post image

Features of this Barn Plan

  1. 20′ interior clear span.
  2. 9′ Clearance on the lower level
  3. 8′ 9″ Clearance in the center of the loft.
  4. It has a 12:12 Gable pitch and a 3:12 pitch on the lean to.
  5. Steel plate joinery for extra strength.
  6. Heavy Timber Construction and extra wide posts and beams.

These Barn Plans include a 20′ wide clear span. In this configuration you have many options available to you. The most obvious would be to use the barn to house animals, or create a nice workspace. With a loft in this barn design you can enjoy tons of extra storage space without compromising your work space.

gable barn plan 3d image

20×40 Gable Barn Plans with a full loft…

With a full loft you can enjoy a total of 800 square feet of space above, that regular pole barn designs just don’t offer. Use it to store hay, or an out of the weather place to hide out after chores. Sometimes you just want to get away from everything, shut off that cell phone and lay back in the hay. Doesn’t that sound relaxing? The sweet smell of the hay and the sound of the gentle blowing of the horses interrupted by the cackling of that Rhode island red hen announcing to the world the arrival of a freshly lain egg.

Download these 20×40 Gable Barn Plans
in our barn plans library now!

These are full construction 20×40 Gable Barn Plans that you can build this barn from. Plus you will also get included with these plans my ebook titled How to Build Your Post and Beam Barn. The book takes you through the whole construction process step by step, including information about securing local timbers, finding the right contractors, and preparing your site.

Click the option below and get started on your new ‘old barn.’

Become a Member to Download These Plans now!

Solid Steel Plate Timber Brackets

We have put together all the hardware you need to build this majestic post and beam barn! All the plates, brackets, and timber screws are there.

Learn more details and how to get your DIY Hardware Kit...

steel hardware

Hardware Kit for this barn includes….

20×40 Gable with 14×30 Lean to Hardware Kit:

21 U brackets

26 T plates

38 4-Hole strap plates

150 ct 3/8 x 8″ RSS screws

500 ct 5/16 x 5 1/8″ RSS

750 ct 5/16 x 4″ RSS


Request a quote by emailing info@barngeek.com with your name, address, and the barn you are interested in.

Hardware Pricing


4 hole strap plates

(2 needed for each connection)
$44.99 per piece Bare Steel
$52.99 per piece Powder Coated Black

6 hole strap plates

(2 needed for each connection)
$44.99 per piece Bare Steel
$52.99 per piece Powder Coated Black

T plates

(2 needed for each connection)
$54.99 per piece Bare Steel
$62.99 per piece Powder Coated Black

Plus plates

(2 needed for each connection)
$64.99 per piece Bare Steel
$72.99 per piece Powder Coated Black

U brackets
$54.99 per piece Bare Steel
$62.99 per piece Powder Coated Black

2-Stage U brackets
$64.99 per piece Bare Steel
$72.99 per piece Powder Coated Black

*Due to supply chain issues we no longer include bolts/nuts with plates or brackets.  We recommend using local sources, like TSC (tractor supply) or online sources like Bolt Depot.

*shipping is not included

We also offer RSS Screws:
3/8" x 8" RSS (Timbers)
250 ct $349
5/16 x 5 1/8" RSS (Purlins)
250 ct $149
5/16" x 4" RSS (Girts)
250 ct $129

Read More about Post and Beam Barn Kits below.

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