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30x40 Pole Barns and Garages

Written by Anna Maxwell | August 10, 2026

30x40 pole barns and garages are one of the most requested sizes of builds we have. The variety of 30x40 builds we have done can't be fully described 😅 

The 30x40 is a popular size for hobby barns, residential garages, personal party barns or storage builds. The flexibility in look, design, and layout allow the building to serve any variety of purposes (even as a smaller post frame home!)

Below are just a few of the 30x40 garage barns we've built, some descriptors for them, and some links to plans. We typically custom design the builds we construct for clients, and all of these 30x40 buildings are no different. You'll find that the style can vary widely based on your design choice. But no matter what design or style you choose, we're always happy to be a part of making your dream build come together! 

This is a 30x40x16 with Black steel siding, roof, and trim, and cedar/wood-tone accents that we built in Lake County, Indiana. 

Another 30x40x10 garage build we constructed in Cass County, Michigan. It's built with Dark Red Frost steel wainscot, roof, and trim, and Tan walls. 

 

This (above) garage build was built in Indiana, and stands at 30x40x16. Colors on this barn are Clay and White. And you can see the interior was left un-finished on this project as well. Some people have needs for temperature controlled interior package, or even a full heated/air-conditioned space! We offer customizable interior options for each person's unique building needs.

 

 

And this pretty 30x40x12 was built for a client in Lowell, Indiana. A beauty in Black metal everything 😊

 

Our party barn design! This Red and Black barn has been one of our most popularly requested plans. It has some fun attributes, like the faux loft window, cedar accents, turkey tail gable accent, and a full interior party barn finish (even a kitchenette area and bathroom!)

And of course, we can't leave out this 30x40x18! Two story/lofted barn! Sliding Dutch doors, Black and White classic look. We love it all 😍

   

This is another 30x40 build that we did a complete re-skin/renovation on; including adding an interior package that included insulation, interior metal liner, and a loft area to maximize space in the garage.

 

This vinyl siding 30x40x14 in Lafayette, Indiana, was constructed with shingles, vinyl siding, and brick wainscot. Not our traditional "metal barn" build, but still built post frame and at the top quality! Post frame construction is quite flexible, and can be done with more than just metal siding. Our clients have chosen typical metal siding, premium metal siding options, vinyl, shiplap style siding, board and batten (or cottage panel), and more.

Some plans that we have ready to go in the 30x40 category include the following: 

30x40x12 Party Barn Plans 

This one is a stunner, and the Milmar Buildings founder even had it built on his own property! 

30x40x10 Detached Garage

This build features the doors being on the longer side/eave side of this build. The orientation of your own build should match what you need most/what your use case is, as well as your style preferences. 

 

32x40x14 Gambrel Style Garage Barn Plans

This one can be altered to be a 30x40 as well, but is right in that same size range, as is.

Needless to say, a 30x40 garage build is a popular size, flexible with style and layout, and might be just the size of garage or barn you're looking for!