New Guide Could Slash Flood Risk for UK Homes
UK engineers and surveyors at the University of Portsmouth are developing a groundbreaking guide to help cut the number of homes flooded by new developments. Their weapon of choice? Sustainable drainage systems, or SuDS, designed to slow flood waters and ease pressure on existing drainage.
How SuDS Could Protect Your Home
Sustainable drainage methods tackle flooding by storing rainwater in ponds and wetlands or letting it soak back into the ground. This natural approach not only cuts flood risk but also cleans polluted run-off and makes urban spaces greener and more attractive.
Unlike traditional pipes that swiftly funnel water away, SuDS slow down water flow, giving the environment a much-needed breather.
The Money Question: Who Pays for Green Drainage?
The problem? It’s tricky to put a price tag on SuDS benefits, making it harder for developers and councils to commit. Traditional piped drainage costs are clear and covered by water bills, but who picks up the tab for these green solutions?
“There is no clear professional guidance available on valuing sustainable drainage systems. Ponds, wetlands and grass ditches slow the flow of water compared to pipes, they create a better urban environment, better habitats and cleaner rivers,” said Dr John Williams, environmental tech expert at Portsmouth’s School of Civil Engineering and Surveying.
Dr Williams has secured a £100,000 grant from the Natural Environment Research Council (NERC) for this two-year project to crack the code.
Partners Join Forces to Measure Costs and Benefits
Working with partners like the Royal Institution of Chartered Surveyors, Hampshire County Council, Southern Water, and Defra, Dr Williams and his team aim to create a toolkit. This will help planners, engineers, and developers evaluate the costs versus benefits of including sustainable drainage in new builds.
The goal? A practical guide to help decide if buyers might pay more for a house near a pond or green space—and how to balance upfront costs with long-term environmental gains.
With recent floods stirring debate, this project couldn’t be more timely. It could finally clear up the confusion over green infrastructure adoption and make flood-safe housing the new standard.
