Sekisui House, Ltd. (積水ハウス株式会社) is a major Japanese homebuilder and real estate developer headquartered in Osaka, founded in 1960. The company designs, manufactures, and sells detached houses and condominiums, using industrialized construction methods such as prefabricated steel- and wood-frame systems. Its operations span community development, urban redevelopment, remodeling and renovation, as well as real estate brokerage and property management through group companies.
Sekisui House also focuses on housing performance, including energy efficiency, resilience, and indoor environmental quality, and engages in R&D on building materials and smart-home technologies. The company operates primarily in Japan with an expanding international footprint, including North America and Australia, and works across the construction supply chain to advance quality, safety, and environmental performance in residential buildings.
