Advanced Window Renovation 2026 Project: Subsidies for Non-Residential Buildings

Advanced Window Renovation 2026 Project: Subsidies for Non-Residential Buildings The Advanced Window Renovation 2026 project now includes "residential buildings and some non-residential buildings," expanding the scope of eligible subsidies to include non-residential buildings. This page summarizes the newly eligible non-residential buildings. Eligible Buildings: The Advanced Window Renovation 2026 project also includes the following non-residential buildings as eligible for subsidies. List of non-residential building uses eligible for subsidies under this program Subsidy amount Eligible work Work that falls under 1⃣ and 2⃣ below but does not fall under 3⃣ 1⃣ Renovations using eligible products that fall under the following categories Glass replacement: Work to remove only the glass from existing windows and replace it with double-glazed glass, etc., while using the existing sashes as they are Installing interior windows: Work to install new interior windows inside existing windows, or remove existing interior windows and replace them with new interior windows Exterior window replacement: Cover method: Work to remove the glass from existing windows, cover and install a new window frame over the existing window frame and replace it with double-glazed glass, etc. Demolition method: Work to remove the glass and window frame from existing windows, install a new window frame and replace it with double-glazed glass, etc. Door replacement: Cover method: Work to remove the existing door while leaving the frame, install a new frame over the existing frame and replace the door Demolition method: Work to remove the existing door and frame together, install a new frame and replace the door 2⃣ The subsidy amount is 11 yen or more 3. Examples of renovation work that are not eligible for subsidies Construction start period: November 28, 2025 to December 31, 2026 at the latest (until the budget limit is reached) Subsidy amount Glass replacement Detached houses, non-residential buildings with a total floor area of 240 m² or less Low-rise apartment buildings, mid-to-high-rise apartment buildings, non-residential buildings exceeding 240 m² Installation of interior windows Detached houses, non-residential buildings with a total floor area of 240 m² or less Low-rise apartment buildings, mid-to-high-rise apartment buildings, non-residential buildings exceeding 240 m² Exterior window replacement (cover method) Detached houses, non-residential buildings with a total floor area of 240 m² or less Low-rise apartment buildings, non-residential buildings exceeding 240 m² (3 stories or less) Mid-to-high-rise apartment buildings, non-residential buildings exceeding 240 m² (4 stories or more) Exterior window replacement (demolition method) Detached houses, non-residential buildings with a total floor area of 240 m² or less Low-rise apartment buildings and non-residential buildings with a total floor area exceeding 240 m² (3 stories or less) Mid-to-high-rise apartment buildings and non-residential buildings with a total floor area exceeding 240 m² (4 stories or more) Door replacement (cover method) Detached houses and non-residential buildings with a total floor area of 240 m² or less Low-rise apartment buildings and non-residential buildings with a total floor area exceeding 240 m² (3 stories or less) Mid-to-high-rise apartment buildings and non-residential buildings with a total floor area exceeding 240 m² (4 stories or more) Door replacement (chipping method) Detached houses and non-residential buildings with a total floor area of 240 m² or less Low-rise apartment buildings and non-residential buildings with a total floor area exceeding 240 m² (3 stories or less) Mid-to-high-rise apartment buildings and non-residential buildings with a total floor area exceeding 240 m² (4 stories or more) *1 For non-residential buildings, the target buildings are those permitted to be constructed in Category 1 Low-Rise Residential Zones and Category 2 Low-Rise Residential Zones under the Building Standards Act. *2 Based on the "Technical Information on the Evaluation of Energy Consumption Performance in accordance with the 12 Energy Conservation Standards (Housing)" published by the National Institute for Land and Infrastructure Management, specifically "28. Calculation Method of Energy Consumption Performance 2.1 Calculation Method Chapter 5 Heating and Cooling Load and Envelope Performance Section 7 Thermal Transmittance and Linear Thermal Transmittance 5. Thermal Transmittance of Parts 5.2 Openings 5.2.4 Thermal Transmittance of Openings (Windows, etc.) or Opening i (Doors, etc.) that are Mostly Made of Transparent Materials" (updated April 4), the thermal transmittance of openings can be calculated using methods such as JIS A 2102-1, or, depending on the specifications of the window and door, using the thermal transmittance values specified in Appendix B of Chapter 28, Section 2.2.1 of the "Technical Information on the Evaluation of Energy Consumption Performance in accordance with the 100 Energy Conservation Standards (Housing)". Subsidy limits: Non-residential buildings with a total floor area of 240 m² or less: 1 million yen per building Non-residential buildings with a total floor area exceeding 240 m²: 1,000 million yen per building

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Advanced Window Renovation 2026 Project: Subsidies for Non-Residential Buildings

Buildings eligible for subsidies

List of non-residential building uses eligible for subsidies under this project

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Subsidized construction work

Construction commencement period

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Auxiliary upper limit