Energy requirements
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CO₂-intensitykg CO₂-equ./m²
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Energy intensityin kWh/(m²a)
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Emissions inin kg CO₂-equ./a
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Total energy requirement in kWh/a
Energy consumption
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Energy intensityin kWh/(m²a)
The following calculation of potential is based on the property data entered and the simplified calculation of requirements.
Annual CO₂ cost allocation between tenant and landlord
Distribution in energeticIST state:
Residential: Landlord XX% ↔ Tenant XX%
Commercial: Landlord 50% ↔ Tenant 50%
From 2027 (88.93 €/tCO₂)
- €
from 2040 (estimated +400 €/tCO₂)
- €
The prices shown result from the rising CO₂ costs and if no energy efficiency measures are carried out. If CO₂ emissions are lower, the cost share for the owner can fall. The allocation between landlord and tenant is based on the German CO₂ Cost Allocation Act (CO2KostAufG). The costs per tonne are determined by the Budget Financing Act in accordance with Section 10 (2) BEHG. From 2027, the costs can vary freely on the market and therefore increase significantly. The Mercator Research Institute on Global Commons and Climate Change (2023) assumes costs of +400 €/t CO₂ from 2040.
Advantages of energy-efficient refurbishment:
- Increase in value (median price reductions of approx. 30% for buildings that have not been renovated in terms of energy efficiency). Source: HAUFE, Immoscout, Immowelt, etc.
- Better (re)financeability: buildings with energy efficiency class D or worse receive lower loan amounts, margin premiums and higher repayment installments
- Additional increases in residential value, e.g. through apportionable modernizations
- Essential contribution to climate protection