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Funding & renovation check
Use the funding check, solar calculator, heating calculator, window and insulation check, and wallbox calculator for realistic grants, payback, and CO2 impact.
Funding check
Enter project, federal state, and status. The check shows matching programs and the key deadline note.
Status
Building
Project
Law & application
The biggest funding mistake is commissioning too early. That is why the page shows deadlines, sources, and uncertainty directly in the calculator.
Many grants must be requested before the project starts. Getting quotes is usually possible; commissioning often is not.
U-values, efficiency, contractor declarations, and energy-efficiency experts can be decisive.
Changed rules go into admin review first. Only manually confirmed content is public.
