A Tour of Greener Grangetown

Opened just recently, the pioneering SUDs scheme, ‘Greener Grangetown’, is situated in the heart of Cardiff city centre. Whilst we can point you to the technical details of the scheme and wax lyrical about the hydrology and engineering involved, this blog focuses on the human and community narrative surrounding this project.

Ian Titherington, lead Drainage Engineer of Cardiff City Council and resident of Greener Grangetown himself, had a transformative vision for this ward of the city.  His ambition was to use natural infrastructure to manage surface water and, most importantly, to go beyond the basic rain garden approach. This was no mere tick-box exercise. It involved extensive consultation with a diverse, multicultural community and a skilful negotiation of the wants and needs of stakeholders, including utilities, highways teams and the politicians.

On arrival at Cardiff central station I was greeted by the man who had seen the project through from conception to implementation. As we walked along the network of streets that had been transformed by the varying sizes of rain gardens and the engineered SUDs tree pit systems which had been integrated as stand-alone build outs in some streets and linked trenches in others, one thing stood out – the community.

What was once a very tired looking, somewhat unloved area of the city, treated as a rat run, places with dark, unwelcoming areas where Ian told me that crime was rife, has become a place where everyone can share a space to be proud of. It is a proven fact that if we provide spaces and homes citizens can be proud of they wake up with a sense of optimism and possibility.

The change is manifestly clear from a walkabout of the area any day of the week at any time. Cyclists and pedestrians’ benefit, users of the community center and local mosque have aesthetic, vibrant streets to call their own. The area is no longer a commuter parking lot but a place where residents illicitly grow butternut squash in the rain gardens and police each other, to ensure that a higher standard of care is taken to keep streets better for all.

I’ve hardly mentioned the SUDs benefits, but for now, that’s just not the point. Places for people. That’s what I saw today.

Ian’s passion and drive for the retro fitting of a SuDs design at Grangetown has resulted in a scheme which has brought multiple tangible benefits to the area. The project which has been internationally recognised as:

not only aesthetically improving an area but also contributing by removing almost all of the surface water runoff from combined surface water sewer.

The design which was developed by Arup together with Dŵr Cymru Welsh Water and Natural Resources Wales and extensive consultation with the residents within Grangetown, has improved the cycle network in the area and retained an excellent line of mature trees along the Taff embankment.

Discover more on this insightful project with our latest Podcast with Ian and Charlotte!

For decades, the way we designed drainage in our towns and cities followed a simple principle: get water away from

A ‘Super El Niño’ is set to make 2027 one of the hottest years on record, with temperatures potentially exceeding

What stood out at UKREiiF 2026, across a range of sessions and conversations, was how often different speakers and disciplines

Raingardens are designed to manage rainfall where it lands. Instead of sending water straight into underground pipes, they slow, store

Urban tree populations in cities around the world are under pressure. Despite the clear benefits trees bring, including cooling streets,

When the phrase root girdling appears in a specification meeting or planning discussion, it tends to stop the conversation cold.

One of the biggest challenges facing the urban greening industry today is how we respond effectively to the accelerating climate

Planting a tree is often framed as an act of optimism, a gesture toward a greener, more hopeful future. But

Sustainable Drainage Systems (SuDS) are most effective when they are treated as a core part of urban design rather than

Designing urban landscapes that successfully support both healthy tree growth and the structural needs of pavements, pathways, and vehicle areas