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Prefabricated elements allow the cabins to be assembled on site without the use of heavy construction machinery, a key consideration when building in sensitive natural environments.

The prefab design utilizes a pin foundation system that reduces the project’s carbon footprint by 77 percent, says Wittman.

The home is a near-even split of indoor and outdoor space.

In the living space, a custom sofa doubles as a pullout bed. An Aeris Cocoon bioethanol fireplace is suspended from the ceiling.

The prefabricated cabin consists of four modules connected by covered walkways. Each module has a dedicated purpose: living, sleeping/studying, energy, and outdoor dining. Connected to the sleep/study space, the energy module has a greenhouse and rainwater collection system.

The pilot home on Whidbey Island demonstrates the system’s potential: a 600-square-foot interior paired with nearly equal covered outdoor space, set lightly on a pin foundation that protects tree roots and cuts carbon by 77 percent. "Puzzle Prefab can be modified according to each site,