Cool Net Tokyo (Promotion of energy conservation and renewable energy introduction in rental housing)
Updated: July 2026, 1
When upgrading insulation performance and installing renewable energy equipment in rental apartment buildings in Tokyo, partial subsidies are available.
Specifically, these expenses include those related to high-insulation windows and doors, renovations of insulation materials, energy-saving diagnosis, etc., as well as part of the expenses related to the introduction of renewable energy equipment.
Benefits of the promotion project for introducing renewable energy equipment to rental housing complexes
As a rental property manager, you can expect improved tenant satisfaction and reduced vacancy rates in rental properties that have implemented energy-saving measures and introduced renewable energy.
In addition, the added value of being an eco-friendly home will increase the asset value of the property in the long term.
By registering with Cool Net Tokyo as a repair and inspection business, you will be recognized as a trustworthy business approved by a public institution, making you more likely to receive requests.
Overview of the project to promote energy conservation and renewable energy introduction in rental housing
Application period
◆Application for energy saving renovation and diagnostic business registration
From May 15, 28 to February XNUMX, XNUMX
◆Subsidy application
From June 28, 31 to March 17, XNUMX at XNUMX:XNUMX p.m. (The deadline is when the total amount of applications reaches the budget.)
* Advance application required
*The Reiwa 6 application period has ended. The Reiwa 7 application period will be posted as soon as the guidelines are released.
Subsidized housing
Rental apartment buildings used for residential purposes in Tokyo *Energy-saving renovations are limited to existing homes
Grant recipients
◆ Owners of rental apartment buildings who install energy-saving equipment eligible for subsidies
◆ Owners of the facilities that will introduce the subsidized renewable energy facilities
◆ Those who lend energy-saving equipment or renewable energy equipment to owners of rental apartment buildings
* An owner of a rental apartment building must own the entire apartment building.
Subsidy amount and requirements [Energy saving]
Target
Subsidy
Requirements
High insulation window renovation
2/3 of eligible expenses (Maximum 30 yen/household)
・Installation of products that are registered as eligible for subsidies under the national Carbon Dioxide Emissions Reduction Measures Subsidy (limited to support projects related to thermal insulation renovations) or the Decarbonization Industry Growth Promotion Measures Subsidy (limited to advanced window renovation projects). ・Implementing energy conservation diagnostics, etc. ・Implement energy-saving performance labeling
2/3 of eligible expenses (Maximum 60 yen/household)
Highly insulated door
2/3 of eligible expenses (Maximum 27 yen/household)
・Install doors with a thermal conductivity of 3.5W/(㎡・K) or less. - Carry out window or insulation repairs ・Implementing energy conservation diagnostics, etc. ・Implement energy-saving performance labeling
Energy saving diagnosis, etc.
10/10 of eligible expenses (Maximum 120 million yen per item)
- The project must be carried out in a home where the subsidy-eligible equipment, such as highly insulated windows or insulation materials, is planned to be installed or has been installed. - To be carried out once before and once after installation - When carrying out the inspection before and after installation, the same insulation inspection should be carried out before and after, either by calculation or actual measurement.
Current status drawing for energy conservation diagnosis
10/10 of eligible expenses (Maximum 10 yen/household)
The cost of creating current status drawings to be used in energy conservation diagnosis, etc.
Subsidy amount and requirements [Introduction of renewable energy]
Target
Subsidy
Requirements
Solar Power Generation System
Installation
New construction 住宅
[3.6 kW or less] 18 yen/kW (Maximum 54 yen/Building)
・The electricity supplied by the solar power generation system can be used by all units in the rental housing complex in which the solar power generation system is installed through a single low-voltage power supply.
- The product must be certified as a module by the JETPVm certification established by the Japan Electrical Safety and Environment Technology Laboratories (JET) or be equivalent to or higher than the JETPVm certification, or the product must be certified as a solar cell module by a certification body that is a member of the IECEE-PV-FCS system of the International Electrotechnical Commission (IEC) (only products with certification validity dates are eligible).
After installation, the scheme, installation costs, electricity charges, etc. will be provided to the Tokyo Metropolitan Government, and consent will be given to their use in public relations, etc.
[Over 3.6 kW] 15 yen/kW
Existing 住宅
[3.75kW or less] 30 yen/kW (Maximum 90 yen/Building）
[Over 3.75kW] 24 yen/kW
Flat roof
Mounting: 20 yen/kW extra
Waterproofing work (existing building): 18 yen/kW extra
Functional PV
By functional category Up to 5 yen/kW extra*
Low-voltage power collective receiving facility
Power meter: 7 yen/door
- The watt-hour meter must be certified according to the Weights and Measures Act - Capable of providing electricity data to the Tokyo Metropolitan Government and the Corporation
We will inform you of the compensation for supporting your subsidy application, depending on the amount of the subsidy, as follows: Calculation is based on a step-wise formula (excess progressive).
Subsidy
Remuneration amount (tax included)
Less than 500 million
Subsidy amount x 14% ~
501 million to less than 1,000 million
Subsidy amount x 8% ~
1,001 million to less than 3,000 million
Subsidy amount x 4% ~
3,001 or more
Subsidy amount x 1%~
【One case】 In the case of a subsidy of 1,000 million yen
500 million yen x 14% = 70 yen
500 million yen x 8% = 40 yen
70 + 40 = 1,100,000 yen (tax included)
*Minimum remuneration: 200,000 yen
*Depending on the number and content of your request, we may be able to offer a volume discount from the above amount.
*We will flexibly adjust support content (scope of support) and fees upon consultation.
Our motto is fast response. We establish specialized teams for each project, and our systematized processes enable quick response.
Thorough deadline management
All data is managed in a database. You can rest assured that procedures must be divided into multiple parts, such as performance reports.
Services tailored to the scale of your business
We can also customize the support content to suit your business scale and budget.
Our support record
Our specialized team handles more than 2,500 subsidy applications a year and will support you according to your needs.
Also, if you receive a bulk request, It is also possible to form a dedicated team.
We look forward to hearing from you
In principle, we respond to inquiries on the same day or the next business day. If you do not hear from us for more than 2 business days, the message may not have been sent.
We apologize for the inconvenience, but please contact us again using this form. We also accept consultations over the phone. The first consultation is free of charge.
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