It was founded on August 1, 1960 and is headquartered in Osaka.

[1] In 2009, Sekisui House expanded into Australia.

[2] The company has origins in and is affiliated with Sekisui Chemical, which once was a major chemical firm, but has since diversified due to Asian competition; they supply medical diagnostic lab equipment and manufacture pharmaceuticals worldwide.

The chemical firm has over 100 subsidiaries and affiliates.

In January 2024, Sekisui House announced a deal to acquire U.S. homebuilder M.D.C. Holdings for $4.95 billion in cash.