László Földes studied architecture at the Technical University of Budapest, where he received his degree in 1985. After that he held a scholarship at the Helsinki University of Technology. Later, in 1989 he returned to Finland to work for the Kari Järvinen-Timo Airas architect studio. He came back to Hungary to the invitation of Gábor Turányi, who he had worked with until 1994, when he founded his own architectural firm, Földes Architects.

His most important works include the Forest School in Visegrád (with Gábor Turányi), the gymnasium of Toldy High School located next to the slope of Buda Castle, W.E.T. Innovation Center in Pilisszentiván, and three dwelling houses in Maassluis, the Netherlands. He was the first architect ever to apply “light transmitting concrete” (LiTraCon) in his design for the House at Szilas-brook in Budapest, invented by a young Hungarian architect, Áron Losonczi – winner of the Red dot design award.
He was elected a member of UIA (International Union of Architects) Council on the General Assembly held in Turin, 2008 and again in Tokyo, 2011. He is a visiting lecturer at the Faculty of Architecture at the Technical University of Budapest since 2000. In 2006, his work was awarded with the Ybl-prize.