How much does a rainwater harvesting system for a typical single-family home cost?
A complete rainwater harvesting system for a typical single-family home will generally cost between $8,000 and $10,000. The single largest cost in a rainwater harvesting system is the storage tank. As expected, the cost of a tank depends on its size and construction material. On a per gallon basis, this cost can range from about $0.5 for a fiberglass tank to more than $4 for a welded steel tank. Other components such as gutters, downspouts, roof washers, pumps, and pressure tanks will add to the costs of the system. Professionally installed systems can further increase costs. If the intended use of the system is to collect water for drinking, costs for disinfection must be added to the total cost.
