“The house was an experiment in providing high quality sustainable residential development affordably,” says Rubina. “It was fabricated at a modular factory in less than a month, installed on site in one day, finished completely in about a third of the time it would take to build on-site.” Completed in 2012, the modular two-story home has an L-shaped plan that spans 2,000 square feet and connects to a 500-square-foot studio. Related: Net-zero Unity home is a solar-powered prefab that pops up in just 3 days Off-site prefabrication helped minimize construction waste and ensure an airtight energy-efficient envelope.