Kanagawa Prefecture Net Zero Energy House Installation Subsidy Application Assistance Service
Since applications for the 2026 fiscal year have not yet opened, the information provided is from the 2025 fiscal year.
(As of April 17)
Subsidy overview
This subsidy will significantly reduce initial costs for people building, buying, or renovating a house in Kanagawa Prefecture, as well as those planning to build a house with a small or medium-sized construction company, and will enable long-term savings on utility costs.
About the types of ZEH (Zero Energy House)
What is ZEH?
This refers to a house designed to achieve a net-zero balance of annual primary energy consumption.
What is ZEH+?
This refers to a house that not only meets the requirements of a ZEH (Net Zero Energy House), but also goes even further in energy conservation, achieving a reduction of 30% or more compared to energy conservation standards.
What is Nearly ZEH?
This refers to a house that reduces primary energy consumption by 20% or more compared to energy conservation standards, and then achieves a reduction of 75% to less than 100% through renewable energy sources, etc.
What is Nearly ZEH+?
This refers to a house that meets the requirements of Nearly ZEH, achieves a reduction of 30% or more compared to energy-saving standards, and meets insulation performance level 6 or higher.
What is ZEH Oriented?
This refers to houses that meet energy efficiency standards by 20% or more. This is limited to houses built on small plots of land in urban areas (e.g., less than 85 square meters) or in areas with heavy snowfall.
Subsidy
ZEH+(Including Nearly ZEH+): Per household90 million yen
TOE(Including Nearly ZEH): Per household55 million yen
ZEH OrientedPer household50 million yen
In addition to the above subsidy amount, if the reduction rate of primary energy consumption from the standard primary energy consumption, excluding renewable energy, is "35% or more", then per household20 million yenAdd
Application period
April 25, 2025 - December 26, 2025 (Applications will close on a first-come, first-served basis once the budget is reached)
Target business
This applies to any of the following three types of projects carried out by small construction companies (construction businesses that qualify as small and medium-sized enterprises):
A project to build new ZEH (Zero Energy Houses) within the prefecture.
A project to purchase newly built ZEH (Zero Energy House) homes within the prefecture.
A project to renovate existing homes in the prefecture into ZEH (Zero Energy Houses).
Do you have this problem?
I don't know how to adjust the schedule or when to submit the application.
The documents required for applications and performance reports are specialized and time-consuming to gather.
The rules are strict, and I'm afraid of failing and losing the subsidy.
The detailed reporting procedures to the prefecture, such as filing notifications when starting a project and applying for changes to specifications, are troublesome.
Benefits of requesting
Swift application procedures with budget limits in mind
This subsidy is granted on a first-come, first-served basis, and construction must commence only after the prefecture has approved the grant. Our organization will promptly handle the application process on your behalf, reducing the risk of budget depletion and supporting a smooth construction schedule with your contractor.
Checking and preparing complex required documents on your behalf.
We reduce your burden by having professionals handle the review and preparation of documents requiring specialized knowledge, such as building floor plans, BELS evaluation report requirements, and specifications for storage batteries.
Support for electronic applications and change procedures
Our organization will handle and support the procedures through the "e-kanagawa Electronic Application System," as well as the complex communication with the prefecture regarding plan changes and project commencement reports. We will minimize the burden on our clients and support them all the way through to receiving subsidies after project completion.
Process to receive subsidy
Applicants who wish to utilize subsidies request construction work from a construction company, and the construction company then applies to our company. (See diagram below)
Therefore, customers can use subsidies as a sales tool to make proposals to applicants (orderers).
Reward table
From 5 yen (excluding tax)
*This may vary depending on the number of applications, urgency, and the scope of required documents.
