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    Average homeowner rating
  • Verified reviews icon65
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Top-Rated Barndominium builders in Johnston - Updated Nov 2026

Avatar for Cover's Construction LLC
Cover's Construction LLC
5.0(
8
)
Garage - BuildShed, Barn or Playhouse - Build

Serving Johnston, IA and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"The entire process from planning to completion was easy, efficient and quickly completed. Joe and his crew are such nice guys and hard workers. They work hard and got the job done faster than I thought possible. The building if perfect!"
Deck with pavilion
Utility building reskin
Backyard shop
Pool Gazebo
Storage/ Shop

+4

Response time3 days
Recommended by100%of homeowners
Avatar for F and F Construction Remodel, LLC
F and F Construction Remodel, LLC
4.9(
24
)
Garage - Build

Serving Johnston, IA and surrounding areas

Approved

In business since 2020

Free estimates

Customers say: Quality work

"We used F and F Construction to help repair and replace boards, spindles, and steps at our Urbandale home on 158th street. Brent and Matt were fantastic in getting the job done quickly and did quality work. We talked for awhile after the job was finished. They are easy to talk with and know what they are doing. I highly recommend them to other home owners in the area. -Winston Morris."
Response time4 days
9 neighbors recently requested a quote
Recommended by89%of homeowners
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Barndominium Builders FAQs, answered by experts

The maximum size of a tiny home you can move depends on your state transportation guidelines, but the rule of thumb is a maximum of 400 square feet. However, as long as it falls within the local limits for traveling on public roadways, you should be good to hit the road.

Rather than using a common two-by-four piece of wood for a rafter, you probably will use two-by-six, two-by-eight, two-by-ten, or even two-by-twelve boards. Wider lumber is typically a better choice in a larger building as it provides more sturdiness. Some installers may use wider lumber for rafters near the edges of the roof, where the greatest stress occurs, and save money with narrower lumber toward the middle.

In the U.S., original and converted carriage houses are most often found in New England, New York, and other parts of the Northeast. New construction carriage houses can be found across the country, and are often added to properties with Colonial-style homes for additional living, storage, or work space, although they can be found in many different styles.

This answer varies based on where you are, but most states require that all homes are greater than 320 square feet. Remember that four walls are not the only requirements—windows, closet space, minimal ceiling heights, and indoor air quality are also factors. Each state and municipality differs, though, and as some don’t consider tiny homes permanent shelters, you’ll need to check to ensure you aren’t violating any local or state laws with your build.

The most significant expense when building a barndominium is constructing the metal shell, which includes the roof, doors, and windows. Additional exterior components impacting the overall cost include metal siding and the concrete foundation.

The Johnston, IA homeowners’ guide to barndominium building

From average costs to expert advice, get all the answers you need to get your job done.