In 1911, he opened his own business and attended courses in draftsmanship from PJC Klaarhamer. From 1917 to 1918 he designed the Red Blue Chair, and was in 1919 one of the first members of the De Stijl movement.
This famous chair design was first published in the magazine "De Stijl" and included in the Bauhaus Exhibition of 1923. To Rietveld´s most important architectural orders, belonged the Schröder House (1924).
In 1927, he made experimental furniture designs made of particle board and plywood, were realized by Metz & Co, Amsterdam. During the Depression, he designed furniture crate elements to meet the demand for low-price products. In 1942, he designed a chair made of pressed aluminum sheet, and in 1957 he created a series of chairs made of bent metal tube. With his last draft, the Steltman chair from 1963, he returned to solid wood elements and geometric formalism.