Sekisui Heim
Sekisui Heim is a Japanese prefabricated housing brand known for its unit-construction steel-frame homes, energy-efficient smart houses, and long-term after-sales support.
Last updated September 26, 2026
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Overview
Sekisui Heim is a major Japanese housing brand operated under Sekisui Chemical Co., Ltd. It is best known for its factory-produced unit construction homes, which are assembled on site with high precision and quality control. The brand was launched in 1971 with the first unit house, "Heim M1," and has since grown into one of Japan's leading prefabricated housing manufacturers. Sekisui Heim offers a range of detached houses, including steel-frame and wood-frame models, as well as rental housing and renovation services. Its product lines include the flagship "Palffe SG Style," the "Grand Two U" wood-series, and the "Smart Power Station" energy-self-sufficient model. The brand emphasizes energy efficiency, with features such as solar power generation, home energy management systems (HEMS), and advanced insulation. It also provides long-term support through systems like the 60-year long-term support program and regular home inspections. In recent years, Sekisui Heim has expanded its business through acquisitions, such as the Australian developer Ausbuild Group and the renovation condominium company Mirai Toshi Kaihatsu. It also collaborates with educational publishers like Shogakukan for promotional campaigns. The brand has faced some regulatory issues, including non-compliance with building standards announced in 2023, for which it has implemented preventive measures. Sekisui Heim operates a nationwide network of showrooms and housing lots across Japan, and its parent company, Sekisui Chemical, is listed on the Tokyo Stock Exchange. The brand continues to focus on sustainable living, disaster-resilient homes, and advanced environmental performance.
History
Sekisui Heim was launched in February 1971 with the first unit house, "Heim M1," marking the beginning of its prefabricated housing business. The 1970s saw the oil crisis and a shift from quantity to quality in housing, leading to models like Heim M2 (1974) and Heim M3 (1975). In 1979, the brand received the Deming Prize for quality control. The 1980s brought diversification: the three-story urban house "Skyward" (1981), the luxury "Gloire" (1982), and the development of the 2x4 unit construction method for wooden houses, resulting in the "Two U Home AII." In 1990, the Housing Comprehensive Research Institute was established. The 1995 Great Hanshin-Awaji Earthquake prompted the launch of the three-story house "Heim Desio" with a standard home elevator, and in 1996, the renovation company "Sekisui FamiS" was founded to provide detailed customer support. In 1997, Sekisui Heim began selling houses with solar power generation, and in 1999, the "EX Series" with standard solar equipment was introduced. The 2000s focused on energy efficiency and long-term support: the STACK and STREAM systems were introduced in 2000, followed by the 60-year long-term support system in 2001. The "Zero-Style" concept (2003) and the 2x6 wooden house "Grand Two U" (2004) were launched. In 2005, the "Warm Airy" air conditioning system was developed, and in 2007, the hybrid seismic technology "GAIAS" was created. The "Sum Stock" brand for quality existing housing was established in 2008 with eight other housing manufacturers. The 2010s marked the smart house era: the "Smart Heim" with standard HEMS (2011), the "Advanced Smart Heim" with storage batteries (2012), and the flagship "Smart Power Station" (2013) aiming for energy self-sufficiency. In recent years, Sekisui Heim has expanded through acquisitions, including the Australian Ausbuild Group and the renovation condominium company Mirai Toshi Kaihatsu. In 2023, the company announced non-compliance with building standards in some apartment and detached houses and has since implemented recurrence prevention measures.
- 2023
Announced non-compliance with building standards in some houses
- 2013
Flagship "Smart Power Station" launched
- 2012
"Advanced Smart Heim" with storage battery launched
- 2011
"Smart Heim" with standard HEMS launched
- 2009
"Comfort Airy" year-round air conditioning system launched
- 2008
"Sum Stock" brand established with eight other housing manufacturers
- 2007
Hybrid seismic technology "GAIAS" developed
- 2005
"Warm Airy" air conditioning system developed
- 2004
2x6 wooden house "Grand Two U" launched
- 2003
"Zero-Style" concept launched
Products and positioning
High-quality, energy-efficient prefabricated homes with advanced technology and long-term support.
Heim M1
First unit house launched in 1971
Palffe SG Style
Flagship custom-built house series
Grand Two U FR
Wooden house series with advanced environmental performance
Smart Power Station
Flagship energy-self-sufficient smart house
Smart Heim
Smart house with standard HEMS
Zero-Style
Lifestyle proposal to reduce utility costs
Two U Home
2x4 unit construction wooden house
Sources2 sources
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