The competition was open to designers aged between 25 and 35 working in product, furniture, exhibition or events design, as well as in architecture.
Tanner saw off a shortlist of finalists which also included design writer Max Fraser, Dan Ziglam of furniture design company Deadgood, and Nick Rawcliffe, founder of Raw Studio.
He has been awarded £5000 to develop a project of his choice. Tanner will work in collaboration with Turkish designers to promote craft-based manufacturing.
Tanner and his fellow finalists visited Turkey last November on a paid-for tour as part of the competition, where they were encouraged to network and establish contacts with local designers and entrepreneurs.