He is particularly known for his association with the De Stijl movement, which emphasized abstraction, geometric forms, and primary colors.

Rietveld was closely connected to the De Stijl movement, which was led by artists like Piet Mondrian and Theo van Doesburg. The movement sought to create art and design based on harmony, abstraction, and a simplified geometric approach to composition.

One of his most famous works is the Rietveld Schröder House (1924) in Utrecht, which is considered a masterpiece of modern architecture and a prime example of the principles of De Stijl. The house is recognized for its open-plan design, use of primary colors, and the integration of space and structure.

Rietveld was also known for his furniture, the most iconic being the Red and Blue Chair (1917). This chair is a bold example of the De Stijl movement's influence on design, with its use of primary colors, straight lines, and geometric shapes.

While initially associated with De Stijl, Rietveld's work evolved, incorporating elements of functionalism and a more pragmatic approach to architecture and design. He worked on various projects, including public buildings, residential homes, and furniture, blending modernist and classical elements.

Rietveld's legacy has had a profound impact on modern architecture and design, shaping both practical and aesthetic approaches to these fields.