Our price and cost estimates for a prefab ADU from Rhino Cubed range from $289 - $500+ per square foot. These estimates are all inclusive, meaning that the cost of the ADU, labor and site work are included. This cost estimate is based on the retail project cost of a prefab ADU from Rhino Cubed (about $55,000 - $196,000+), plus the cost of the foundation and other on-site work. The cost of land and any home upgrades are not included in this estimate. It is worth noting that Rhino Cubed ships their homes completely finished, leaving less on-site work and labor costs than for traditional modular homes. Below, you can find a table of our cost estimates for a finished house from Rhino Cubed.