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WOFATI, an acronym coined by Paul Wheaton, stands for Woodland Oehler Freaky-cheap Annualized Thermal Inertia. It defines a type of earth-sheltered, passive building that blends affordability with energy efficiency. Inspired by the work of Mike Oehler, a pioneer of earth-sheltered building, WOFATI designs use locally sourced, natural materials, such as wood and earth, to minimize both cost and environmental impact. Central to the WOFATI concept is Annualized Thermal Inertia, which utilizes the surrounding earth as a thermal mass to moderate temperatures year-round. This means that the building stays warm in the winter by storing heat from the summer, and cool in the summer by retaining the coolness of the winter, greatly reducing the need for artificial heating and cooling. WOFATI structures typically have a large gable roof on the downhill side, and at least 35% of the uphill wall is made of glass or other light-transmitting material to maximize passive solar gain. WOFATI buildings are ideally situated on or near a woodland, emphasizing a harmonious integration with nature. Allerton Abbey, the first WOFATI, along with Wofati 0.8, are examples of this building style and can be found at Wheaton Labs.

The "freaky-cheap" aspect of WOFATI is fundamental to its appeal and accessibility. Inspired by Mike Oehler's pioneering work in earth-sheltered building, WOFATI prioritizes utilizing readily available natural materials, primarily wood and earth, minimizing reliance on expensive, manufactured products. By embracing the "freaky-cheap" ethos, WOFATI construction drastically reduces building costs, making sustainable living a more attainable reality. The emphasis on "soil on wood" construction eliminates the need for a traditional concrete foundation, further reducing expenses. This approach also facilitates rapid building times, as demonstrated by the construction of WOFATI structures at Wheaton Labs, such as Allerton Abbey. The use of recycled or salvaged materials, whenever possible, further contributes to the affordability of WOFATI buildings. By minimizing material costs and construction time, WOFATI empowers individuals to create sustainable and comfortable dwellings without incurring significant financial burdens.

Hugelkultur, is a permaculture technique for creating raised garden beds filled with rotting wood and covered with soil. This method, whether small-scale or large-scale, as exemplified by Sepp Holzer's work, which includes almost a kilometer of hugelkultur beds, uses a variety of wood, from branches and twigs to entire trees. Hugelkultur is beneficial because as the wood breaks down, it acts as a sponge, retaining moisture and reducing or eliminating the need for irrigation. This process also creates "parking spaces" for water and nutrients, leading to fertile soil that requires less fertilizer. Hugelkultur is a practical and sustainable permaculture solution for gardeners seeking to create self-sufficient garden ecosystems.