Stormwater runoff mitigation pays off for some building owners

Rain gardens, green roofs, cisterns, and rainwater recycling add value.

August 30, 2017 |
Rain falling into a puddle

Pixabay Public Domain

More local governments are requiring building owners to mitigate the impact of stormwater runoff.

Solutions including rain gardens, green roofs, cisterns, and rainwater recycling add cost to projects, but they also yield value to properties, according to a new report by the Urban Land Institute. Elements that captured stormwater enhanced the user experience, improved place-making opportunity, and improved development yield of land.

A 200-unit apartment complex in Boston, for example, garnered an additional $300 to $500 per month in rent for units that overlooked a green roof. The green roof cost $113,000 to build, and the extra rent nets $120,000 per year, according to the ULI report.

Green infrastructure including bioswales, is more cost-effective than graywater infrastructure where sewage mains and tunnels collect and treat stormwater and sewage before discharging, studies show.

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