Back Forty Builders

Back Forty Buildings offers stock and custom floor plans for both barndominiums and shop houses. The company was started after the owners built their own barndominium and felt there needed to be a better, easier way to construct steel buildings.

Located in Tri-Cities, WA, Back Forty has something for every buyer, whether you’re a DIYer or looking for a custom, unique building.

Stock and Custom Floor Plans

© Back Forty Buildings

Are you looking to build on your lot in Washington state? Back Forty has both stock and custom floor plans for barndos and shouses. In fact, the company is one of the leading Washington shop house builders.

Whether you’re looking for a smaller one-story home or a larger multi-story steel structure, Back Forty has a stock floor plan that will meet your needs (20+ to choose from).

If you have a specific design in mind or you can’t find a floor plan that meets your needs, Back Forty can create a custom plan for you.

Back Forty has an in-house design and engineering team. In addition, they work with leading manufacturers in the U.S. to provide high-quality, durable building systems.

The Build Process for Modern Metal Barn Homes

Modern White Barndominium The Big Sky by Back Forty Buildings
© Back Forty Buildings

Back Forty has a simple and straightforward build process for their steel homes.

Choose a Floor Plan

The first and most crucial step is choosing a floor plan. Choose one of Back Forty’s stock plans, or work with their team to build a custom floor plan.

  • Stock plans are delivered immediately.
  • Custom plans take 2-3 weeks to complete.

Schedule a Consultation

Once you have chosen a floor plan, it’s time to schedule a consultation. During your consultation, the Back Forty team will gather more information about your project and work on fine-tuning your design.

Engineering Phase

Next is the engineering phase. Every Back Forty building is engineered for wind and snow loads for your area.

The engineering part of the process takes about a week.


Once the engineering phase is complete, Back Forty will provide you with a bid, which includes the costs of your roof, steel and wall panel costs. They can also provide an estimate for your doors, windows and insulation at this time.

This phase will take about 10 days.

If you decide to accept the bid, Back Forty will provide an invoice for the project. You will need to provide 25% of the total project cost to start the manufacturing process. The remainder of the invoice will be due just before shipping.


Back Forty will start manufacturing your home’s components in one of their U.S. factories. The manufacturing phase will take 6-12 weeks.

Shipping and Assembly

Once the manufacturing stage is complete, Back Forty will bill you for the remainder of the invoice and set a date for delivery.

You can choose to offload your own building if you wish.

The final step is assembly. You can choose to DIY build, or you can hire a contractor. Back Forty has a number of resources available, and they are happy to answer any questions you may have about assembly.

How Much Does Back Forty Cost Per Square Foot?

Estimating the cost of a Back Forty home is difficult because there are so many factors to consider, such as:

  • Site preparation: Grading, excavation, utilities, etc. Do you need to install a septic and/or well? That will add to the cost.
  • Raw materials: The cost of steel and lumber can fluctuate.
  • Home plan: Square footage, number of doors and windows, number of roof pitches, etc.
  • Finish selections: Countertops, flooring, showers, tubs, etc.
  • Labor: The cost of labor can vary significantly from one location to another.

Back Forty does provide a ballpark estimate on the costs per square foot based on how you’re going to erect the building.

  • $85-$85/sq.ft. for a DIY build (doing 60% of the work yourself).
  • $100-$140/sq.ft. if you’re going to do part of the work yourself (painting, installing cabinets, laying down floors, etc.).
  • $150-$190/sq.ft. for a turnkey build or general contractor.

The best way to get a more accurate estimate of your home’s cost is to get in touch with Back Forty to discuss your needs and the floor plan you have in mind.

Featured Builds & Floor Plans from Back Forty Builders

The Polson 'Black Barndominium' Plan by Back Forty Builders

Polson Black Barndominium by Back Forty Builders

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