Costs: Rainwater harvesting | Features

Specification options
Domestic rainwater recycling	Capital cost	Net present value
	£/m2	for 60 years £/m2
Conventional system; utility supply for all water use and stormwater drains for disposal	1,275	10,980
Rainwater harvesting system – underground tank, partial mains water use, utility stormwater drainage	3,825	10,700
Rainwater harvesting system – above-ground tank, partial mains water use, utility stormwater drainage	3,585	10,870
Rainwater harvesting system – underground tank, partial mains water use, soakaway for stormwater drainage	4,375	10,520