CO₂ Transparency in "
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Just a few details are needed: Receive a free PDF via email showing the annual breakdown of CO₂ costs between tenant and landlord, as well as a forecast of your property’s value appreciation.
* Note: A quote can be provided for total areas of 350 m² or more.
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CO₂ Cost Calculator

Wilhelm-Stolze-Strasse 18
10249, Berlin

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Building type
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Total area
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Energy source
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thereof commercial
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Year of construction
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of which residential
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Optimization potential
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All information and recommendations presented in this report are based on a preliminary analysis of the data provided and do not replace a detailed on-site inspection of the property by Purpose Green experts. We reserve the right to make changes to the calculations and the actual energy status shown.
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)
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Energy efficiency class
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EPC date
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

The complete data will be displayed after you download your report.

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
Date: 14.03.2024
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