ZETA Communities, a Bay Area-based green building startup, created its first net-zero modular demonstration home last year. Now, the company is already pursuing even bigger projects. With the help of its new 91,000-square-foot net zero energy factory, the company is now moving on to commercial projects, including three schools in California. The first of these is a 4,000-square-foot structure for the Davis Waldorf School in Davis, CA. The school was build in just four weeks, and incorporated all the latest in energy efficiency, including Energy Star lighting fixtures, dual-flush toilets, an Energy Star rated cool roof, and eventually, a green roof. Buildings such as these have truly sparked a pre-fab craze due to their reduced construction time and lower cost when compared to traditional structures built on-site.