Phoenix design-build firm The Construction Zone renovated an old concrete-and-steel barn, turning it into a sleek new guesthouse with an open-plan, three-room layout. Completed for approximately $300,000, the 790-square-foot adaptive reuse project carefully preserves the character of the existing structure while upgrading it to match the modern aesthetic of the main residence. Photo 2 of 15 in The Treehouse by Dave Siebert from An Old Horse Barn Is Repurposed as a Chic Desert Guesthouse

The Treehouse

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Phoenix design-build firm The Construction Zone renovated an old concrete-and-steel barn, turning it into a sleek new guesthouse with an open-plan, three-room layout. Completed for approximately $300,000, the 790-square-foot adaptive reuse project carefully preserves the character of the existing structure while upgrading it to match the modern aesthetic of the main residence.