ZEH subsidy
Updated: July 2026, 5
table of contents
ZEH subsidy application assistance service
Subsidy overview
This subsidy aims to promote the spread of ZEH (Net Zero Energy Homes) and advance the decarbonization of housing, and is available for newly built detached houses and apartment buildings, as well as renovations and energy-saving assessments of existing homes.
The main businesses covered are divided into the following three categories:
Newly built detached house ZEH
This program involves building or purchasing detached houses that meet the "ZEH" standard, which aims for net-zero annual primary energy consumption, and the even more energy-efficient "ZEH+" standard. It is divided into two categories: general public application (single-year and multi-year programs), and the second year of the multi-year program.
Eligible persons: Individuals who will be the builder of a newly constructed custom-built detached house or prospective buyers of a newly constructed detached house.
The second year of the multi-year program is for those who received a subsidy in the first year of the "General Public Application (Multi-Year Project)" program.
* Individuals planning to purchase newly built detached houses in multi-year projects are not eligible to apply.
Business Schedule : Application period for new ZEH portal account issuance requestsThe application period is from April 20, 2026 (Monday) to January 4, 2027 (Monday) at 17:00.
If you obtained a ZEH portal account before fiscal year 7, you can continue to use the same account in fiscal year 8.
Subsidy :
Single-year project
・ZEH: 55 yen/house (regions 1-3), 45 yen/house (regions 4-8)
・ZEH+: 90 yen/house (regions 1-4), 80 yen/house (regions 5-8)
Multi-year project
This year: 50,000 yen/unit (for both ZEH and ZEH+)
- Subsequent years (2nd year) :
ZEH: 50 yen/house (regions 1-3), 40 yen/house (regions 4-8)
ZEH+: 85 yen/house (regions 1-4), 75 yen/house (regions 5-8)
*Additional subsidies will be provided if you install additional equipment such as energy storage systems, solar thermal systems, or charging/discharging equipment.
Regarding regional divisions
1 Region: Hokkaido (Northern Hokkaido and Eastern Hokkaido)
2 RegionHokkaido (southern and central parts), Aomori, Iwate, and parts of Akita
3 Region: Most of the Tohoku region, and parts of Nagano Prefecture
4 Region: Southern Tohoku, Northern Kanto, and parts of Koshinetsu
5 Region: Plains of Kanto, Tokai, Hokuriku, Chugoku, and parts of Kyushu
6 Region: Major cities in the Kanto region, and many areas in Tokai, Kinki, Chugoku, Shikoku, and Kyushu.
7 Region: Part of southern Kyushu (Kagoshima and Miyazaki)
8 RegionOkinawa
Recruitment period :
・Single-year project：2026年5月21日（木）10:00～2026年12月11日（金）17:00
・Multi-year project：2026年11月6日（金）10:00～2027年1月8日（金）17:00
・Second year of a multi-year project：2026年5月14日（木）10:00～2026年6月26日（金）17:00
Overview of multi-year projects
In multi-year projects,Each yearYou need to apply for the subsidy and receive approval for its grant.
This year (first year)Obtaining BELSThe project will be considered complete upon completion of this step. Construction work eligible for the subsidy can commence after the grant decision is made in a subsequent year (the second year).
April 1, 2027If you start the subsidized construction work before the deadline, it may be considered premature commencement, and the subsidy may not be paid.
Business flow
*Quoted from the ZEH web official website.
Publicly offered
*Quoted from the ZEH web official website.
Newly built multi-unit ZEH-M
This program provides subsidies for newly constructed apartment buildings, specifically targeting projects to build ZEH-M (Net Zero Energy Houses) that aim for net-zero annual primary energy consumption. These buildings are divided into two categories based on the number of floors: low-rise ZEH-M and mid-rise ZEH-M.
Target :
・Low-rise ZEH-M: The residential portion consists of 1-3 story apartment buildings.
・Middle ZEH-M: The residential portion consists of 4-5 story apartment buildings.
New Construction ZEH-M Portal Account Registration Period
This project requires online application. Please use the "New Construction ZEH-M Portal" provided by SII.
From Thursday, April 30, 2026 to Tuesday, November 24, 2026, until 17:00.
Business Schedule
*Quoted from the ZEH web official website.
Subsidy: 400,000 yen per unit (500,000 yen if LCCO2 calculation is performed)
* Additional charges may apply for the installation of equipment such as energy storage systems.
What is LOCO2 calculation?
When evaluating the environmental performance of a building, it is important to quantitatively (numerically) assess its contribution to reducing CO2 emissions, particularly from the perspective of "preventing global warming."
Existing renovations
This project targets energy-saving diagnostics and renovations for detached houses and apartment buildings that aim to become Net Zero Energy Houses (ZEH), which are homes with net-zero annual primary energy consumption. There are three types of projects: ZEH+ renovation, ZEH remodeling, and ZEH diagnostics.
Eligible persons :
ZEH+ renovation: Individuals or corporations who are the owners or prospective owners of existing detached houses to be repaired.
ZEH renovation: Individuals or corporations who are the owners or prospective owners of the existing house to be renovated.
ZEH Diagnosis: Individuals or corporations who own existing homes and are undergoing energy efficiency assessments.
Subsidy :
ZEH+ renovation: The sum of A) and B) below.
A) Design cost, equipment cost, construction cost
The subsidy amount shall be the lower of the following two amounts: the sum of the design fee (fixed rate), equipment costs, and one-third of the eligible expenses related to construction costs, or the following upper limit.
<Amount of subsidy for design costs>
• Costs related to obtaining BELS certification: 20,000 yen
• Cost required for measuring the effectiveness of this project: 20,000 yen
<Maximum amount>
• Areas 1-4: 4 million yen per dwelling unit
・Areas 5-8: 3 million yen per dwelling unit
B) Public relations expenses
The following amounts apply to each application category, but only if a public viewing (open house, etc.) is conducted.
Corporations: 500,000 yen
Individual... 100,000 yen
ZEH renovationMaximum amount: 2.5 million yen/unit
Minimum amount: 100,000 yen/unit
(Note) If the total amount of subsidies is less than 100,000 yen, the application will not be eligible for subsidies.
*Quoted from the ZEH web official website.
ZEH Diagnosis :
Subsidy rate: Up to one-third of eligible expenses
Maximum subsidy amount:
If obtaining BELS certification: 250,000 yen/unit
If BELS is not obtained: 200,000 yen/unit
Minimum subsidy amount: 50,000 yen per household
Call for proposals schedule
*Quoted from the ZEH web official website.
Do you have this problem?
- My main job is busy
Preparing documents such as drawings and estimates, and operating the "ZEH Portal," takes up so much time that I can't concentrate on my main job. - The requirements and schedule are complex and worrying.
I find it difficult to understand the differences between single-year and multi-year projects, as well as the detailed requirements for each project, such as ZEH, ZEH+, and ZEH renovation. - I don't want to miss out on subsidies due to a mistake.
We want to prevent errors such as incomplete or expired documents.
Benefits of requesting
Managing a massive amount of paperwork and a tight schedule.
By having our firm manage the extensive paperwork, the organization of drawings, and the strict deadlines for mailing, our clients can focus on their core business.
Addressing complex requirements
We keep up with complex requirements and the latest information, and we provide comprehensive support for the most up-to-date application requirements that require specialized knowledge.
Flexible response to all business categories
We support individual and corporate applications, as well as all business categories, including "Newly Built Detached House ZEH," "Newly Built Apartment ZEH-M," and "ZEH + Renovation," and we also manage "multi-year projects" that involve long-term procedures.
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
| Classification | Support content | Remuneration amount (tax included) |
|---|---|---|
| Application (if there is already a hull calculation) | From 99,000 yen | |
| Application (if we perform the hull calculation) | From 143,000 yen | |
| Option | BELS evaluation application agency | From 27,500 yen *Separate fee is required |
*Depending on the number and content of your request, we may be able to offer a volume discount from the above amount.
*If the investigation finds that the application is not applicable, a investigation fee of 5,500 yen (tax included) will be charged.
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Q&A about ZEH subsidies
Your application will not be automatically carried over to the next open call, so you will need to make a new application.
It is necessary to start the project after receiving the grant decision notification and obtaining the grant decision number.
*For FY2, the start date for public recruitment has been postponed due to the spread of the new coronavirus infection, so the start of foundation construction that is not eligible for subsidies is permitted.
If you are applying for a project that is expected to be unable to be completed within the project completion date due to unavoidable reasons related to the project plan (such as the construction process for housing eligible for subsidy), please submit a statement of reasons for the delay (free) at the time of application for grant. format) must be attached.
“Main living room” is categorized by energy consumption efficiency of air conditioner.
It is a requirement to introduce a model that satisfies (a). At the time of application, the implementation plan includes the classification of energy consumption efficiency of the air conditioner.
It is possible to temporarily select equipment that satisfies (a) and enter it as being installed.
In that case, be sure to classify the energy consumption efficiency of the air conditioner.
Please install equipment that satisfies (i).
In principle, changes to the submitted details are not allowed.
The only energy storage systems that can be applied for are lithium-ion energy storage systems that are registered as having a renewable energy energy storage mode in the list of products eligible for subsidy under the 27 supplementary budget housing energy-saving renovation promotion project subsidy.
(Lead-acid batteries are not eligible for subsidy.)
Subsidies funded by the national treasury are not permitted if they overlap with the eligibility criteria of this project. However, it is possible to use subsidies not funded by the national treasury, or national treasury subsidies that do not overlap with the eligibility criteria of this project, in conjunction with this project. Please note that other subsidies, such as those from local governments, may also be funded by the national treasury; therefore, please be sure to check with the relevant office regarding other subsidy programs.
For individual applications for newly built custom-designed detached houses and corporate applications, the following applies: [Single-year projects] For foundation work (without insulation), commencement is possible before the grant decision is made. For "insulation work" and "work other than foundation work" that are eligible for subsidies, commencement before the grant decision is made is not permitted. [Multi-year projects] For foundation work (without insulation), commencement is possible before the grant decision is made for the second year. For "insulation work" and "work other than foundation work" that are eligible for subsidies, commencement before the grant decision is made for the second year is not permitted. However, only for projects that submit an "Application for Approval to Commence Subsidized Project for the Next Fiscal Year" at the time of reporting the completion results in the first year and receive approval from SII, commencement of the project is possible from April 1, 2027 onwards, without waiting for the grant decision for the following year (second year).
This document is not accepted as proof of identity. Please prepare a copy of your identification document that includes your current address.
These cannot be used together. Please choose one and submit your application.
