Cost of greywater systems
Low tech, simple residential greywater system costs
The cost of greywater systems varies on how simple or complex the plumbing is, how large the yard is, and who is doing the installation. On the low tech systems much of the work is digging, digging mulch basins and digging trenches to bury pipe. For tight budgets labor costs can be greatly reduced if you are willing to do much of the digging yourself, or find some eager friends or family who want to support greywater installations (and learn in the process!).
These are rough average costs, exact costs will vary depending on the size and complexity of your site.
Laundry to Landscape- Materials only $100-$250, Full installation $700-$2,000
Branched drain- Materials only $200-$400 Full installation $800-$3,000
Pumped system-Materials only $400-$600 Full installation $1,000-$3,000
For the low tech systems labor costs are usually a few hundred dollars and could go up to a few thousand dollars in larger, or more complicated situations.
High-end, high tech, residential greywater system costs
Sand filter to drip irrigation: $5,000-10,000 depending on complexity of the plumbing and if there is a compatible existing drip irrigation system. (including labor, these systems are not easy to do yourself)