Our price and cost estimates for a prefab home from Gaia Homes range from $349 - 408+ per square foot. These estimates are all inclusive, meaning that the cost of the home module, labor, and site work are included. This cost estimate is based on their instant quote calculator, which includes the cost of the completed ADU ($316 - $350 per square foot) including doors, windows, fixtures, fittings, cabinets and kitchen appliances, drywall finish, electrical, and plumbing. It’s worth noting that Gaia Homes does not handle site work themselves, meaning buyers have to work with a third-party contractor on foundation setting, plumbing, electrical, and photovoltaic hookups. While this can vary from project-to-project, Gaia Homes this to cost $40 - $50 per square foot. While Gaia delivers ADUs themselves to west coast locations, buyers in other places have to work with a third-party delivery company. Below, you can find a table of our cost estimates for a finished ADU from Gaia Homes.