Hugo Bugg, 26, received the top accolade from the Royal Horticultural Society for his graceful Waterscape Garden, sponsored by the Royal Bank of Canada.
Bugg struck gold with his environmentally conscious rain garden that incorporates concrete-lined raised beds and a rusted steel walkway.
Graepel Kinsale, a Cork-based engineering company, supplied the walkway which was an integral feature of the award-winning design.
“Hugo wanted the walkway to look as if it was floating over the garden,” a spokesperson for Graepel said. “To create this illusion, one centre leg was used to support the walkway at minimum intervals. The design team at Graepel had the challenge of making this walkway lightweight without the aid of support steels.
“Graepel are immensely proud to have participated in such a prestigious event.”
West Cork-based sculptor Holger Lonze was closely involved in the project, having been approached by the young designer in March to design and fabricate the prominent water feature for the garden.
Mr Lonze, who travelled to London to help erect the garden, said he was thrilled to hear Mr Bugg had won.
“This is fantastic news,” said Mr Lonze.
“I am delighted to be involved with the project and to collaborate with the gifted designer Hugo Bugg and his team. Working in Chelsea was intense with long hours and unforeseen challenges on site, but very rewarding in the end.
“It is a very beautiful and contemporary garden design that addresses current climate issues and uses a complementary combination of contemporary and traditional materials.”
The garden is on show at Chelsea for four days and will be seen by more than 150,000 visitors from all over the world. After it has been shown at Chelsea, the waterscape garden will be re-installed as a small public park near Vauxhall Station in London.