Updating Ready-Built Detached Houses in Prime Locations to Fully Meet ZEH Standards
Open House Group has announced that starting April 2026, all newly built ready-built detached homes across its group companies will meet ZEH (Net Zero Energy House) standards, aiming for a 100% achievement rate to support decarbonization while improving housing performance.
📋 Article Processing Timeline
- 📰 Published: April 11, 2026 at 00:30
- 🔍 Collected: April 11, 2026 at 00:21
- 🤖 AI Analyzed: April 20, 2026 at 05:09 (220h 47m after Collected)
Open House Group Co., Ltd. (Headquarters: Chiyoda-ku, Tokyo; President and CEO: Ryosuke Fukuoka; hereinafter "the Company") hereby announces that it has established a system anticipating a 100% achievement rate for ZEH (Net Zero Energy House) standards across all newly built ready-built detached houses. This applies to homes with building confirmation applications submitted from April 2026 onwards by group companies supplying detached homes, including Open House Development (including construction contracts within the group by Open House Architect), Hawk One, Meldia, Eidai, and Pressance Jyuhan.
Details: https://oh.openhouse-group.com/about/zeh/
As part of its efforts to achieve carbon neutrality by 2050, the government has set a policy to raise the energy conservation standards for new homes to the ZEH level by 2030. The Company group's detached housing business primarily focuses on wooden houses. Wood acts as a "carbon storehouse," continuing to store CO2 for a long period even after becoming a home. Furthermore, it is a renewable resource derived from sustainable forest management and requires less energy during manufacturing compared to steel or concrete, thus contributing to CO2 emission reductions and helping realize carbon neutrality.
Anticipating tax system revisions from 2028 onwards, the Company group will raise the housing performance standards of ready-built homes to the ZEH level. This ensures that customers can continue to enjoy the benefits of mortgage tax deductions. Breaking the conventional wisdom that "high-performance homes are expensive," and ahead of the mandatory ZEH standards in 2030, all our ready-built homes will fulfill the combined criteria of "prime urban locations," "affordable prices," and "high performance at the ZEH level."
* The ZEH standard will only be standard for ready-built homes. Applying the ZEH standard to custom-built homes will incur additional optional costs.
**What is the ZEH Standard?**
The ZEH standard defines the criteria for a home's outer shell insulation performance and primary energy consumption.
ZEH stands for 'Net Zero Energy House,' referring to homes designed to make the annual net primary energy consumption essentially zero. Specifically, it involves reducing energy consumption by improving insulation performance and introducing highly energy-efficient equipment, while bringing the energy balance to zero or below by utilizing renewable energy such as solar power.
For ZEH-standard homes, the introduction of renewable energy is not a strict prerequisite; rather, the 'outer shell performance' is the crucial point. The higher the performance of the outer shell—the parts separating the interior and exterior of the house, such as the roof, ceilings, walls, floors, windows, and doors—the more it suppresses heat transfer, realizing a comfortable and highly energy-efficient living environment.
A home is a place to heal from fatigue. A home with high insulation performance eliminates the hardship of getting out of bed on a winter morning and the uncomfortable heat upon returning home in the summer, contributing to an improvement in daily peace of mind, or 'Men-pa' (Mental Performance). The Company group pursues this 'Men-pa' in addition to 'Supe-pa' (Space Performance) by fully utilizing limited space, 'Tai-pa' (Time Performance) by shortening travel time through proximity to train stations, and 'Cos-pa' (Cost Performance) achieved through an integrated system from land acquisition to construction and sales.
Supporting this multifaceted value proposition is...
Details: https://oh.openhouse-group.com/about/zeh/
As part of its efforts to achieve carbon neutrality by 2050, the government has set a policy to raise the energy conservation standards for new homes to the ZEH level by 2030. The Company group's detached housing business primarily focuses on wooden houses. Wood acts as a "carbon storehouse," continuing to store CO2 for a long period even after becoming a home. Furthermore, it is a renewable resource derived from sustainable forest management and requires less energy during manufacturing compared to steel or concrete, thus contributing to CO2 emission reductions and helping realize carbon neutrality.
Anticipating tax system revisions from 2028 onwards, the Company group will raise the housing performance standards of ready-built homes to the ZEH level. This ensures that customers can continue to enjoy the benefits of mortgage tax deductions. Breaking the conventional wisdom that "high-performance homes are expensive," and ahead of the mandatory ZEH standards in 2030, all our ready-built homes will fulfill the combined criteria of "prime urban locations," "affordable prices," and "high performance at the ZEH level."
* The ZEH standard will only be standard for ready-built homes. Applying the ZEH standard to custom-built homes will incur additional optional costs.
**What is the ZEH Standard?**
The ZEH standard defines the criteria for a home's outer shell insulation performance and primary energy consumption.
ZEH stands for 'Net Zero Energy House,' referring to homes designed to make the annual net primary energy consumption essentially zero. Specifically, it involves reducing energy consumption by improving insulation performance and introducing highly energy-efficient equipment, while bringing the energy balance to zero or below by utilizing renewable energy such as solar power.
For ZEH-standard homes, the introduction of renewable energy is not a strict prerequisite; rather, the 'outer shell performance' is the crucial point. The higher the performance of the outer shell—the parts separating the interior and exterior of the house, such as the roof, ceilings, walls, floors, windows, and doors—the more it suppresses heat transfer, realizing a comfortable and highly energy-efficient living environment.
A home is a place to heal from fatigue. A home with high insulation performance eliminates the hardship of getting out of bed on a winter morning and the uncomfortable heat upon returning home in the summer, contributing to an improvement in daily peace of mind, or 'Men-pa' (Mental Performance). The Company group pursues this 'Men-pa' in addition to 'Supe-pa' (Space Performance) by fully utilizing limited space, 'Tai-pa' (Time Performance) by shortening travel time through proximity to train stations, and 'Cos-pa' (Cost Performance) achieved through an integrated system from land acquisition to construction and sales.
Supporting this multifaceted value proposition is...