About the project

The project’s key goal is to improve market transparency for energy efficiency investments in the rental housing industry. It does so by providing a benchmarking tool for transnational profitability assessments of such investments. With the development and dissemination of this tool, the project follows three distinct scopes.
First, it uses profitability benchmarking results to provide specific information to real estate owners in national housing markets about profitable investments and cost optimal energy efficiencies that are achievable through refurbishment investments. The focus is to improve target group specific knowledge and facilitate investment decisions.
Second, it provides a “tool to talk” to strengthen dialog between the housing industry, consultants and financial market actors concerning planning, running, financing and regulating energy efficiency refurbishments in the private rental sector.
Third, it uses a standardized methodology in order to allow for a transparent comparison of investment conditions in different EU countries. This should lead to increased competition between countries, pave the way towards a harmonization process of the markets, and remove investment barriers in national housing markets. In the long run, this will lead to a stronger integration of European capital markets for investments in sustainable energy in the building sector.
RentalCal was an EU funded project running from 2015-2018. The project consisted of 11 research organizations from 8 european countries.

The RentalCal Tool

The RentalCal Profitability Calculation tool is a wide-ranging, straightforward tool providing an open and objective comparison of the retrofit opportunities available to investors in the residential rental market. The tool adopt established methodologies and valid input parameters to evaluate various energy retrofits and costs of such investment opportunities.

The RentalCal Tool consists of three parts:

  • In the first part, the basic information to understand and apply the tool is provided to the user. This includes a comprehensive presentation and a video tutorial.
  • In the second step, the necessary input data for the profitability calculation is requested from the user.
  • For the third step (output data), the tool calculates the profitability of the investment in question and displays the results to the user. This also include a feature enabling sensitivity and probability analyses of the relationships between the input dassta and the output data.
RentalCal Tool

Launch the Tool

Assisted Mode*

Profitability Calculation for a selected reference building and a selection of default bundles of measures from TABULA and the RentalCal databases. Default values for energy consumption, average cost figures for measures and energy savings are provided by the tool, which might be overwritten by the user if more accurate information is available. Moreover, the RentalCal consortium has worked out estimations for measure costs which are provided as suggestion values. This option is especially suitable for users who do not have a specific building in mind, but would like to gain a general insight into the profitability of energy efficiency retrofit in rental housing within different building types, ages and measures across the eight European countries. This option is intended for landlords who want to perform a profitability calculation for a specific building which does not come close enough to the offered reference buildings and who do not have obtained a complete energy concept (current consumption, bundle of measures and expected savings) yet.

*Note: Version 2 is currently work in progress (Note: currently only the german case is available).

Freehand Mode*

Profitability Calculation for an own energy concept without any default values for energy consumption and savings, investment cost or suggestions on the right bundle of measures. If the required input data are available, this option is faster and more precise. It is especially intended for energy consultants, civil engineers, architects, owner’s associations and other building professionals who know the technical details and potential costs of the retrofit and want to perform a quick profitability calculation. Moreover, landlords who are consulted by these groups may also use this option.

*Note: Version 1 of the Webtool.

User Manual

The User manual is available in English and German. Click the image to view the corresponding PDF.

Case Stories

To give an impression of the results, one can achieve from using the RentalCal tool, we have gathered a number of case stories (Freehand Mode).

Video Tutorial

Tool Parameters

It is important to find the necessary information, before you start the tool - this makes the process much easier. You can find the necessary information in the illustrations in the manual.

The webtool is available in seven different languages. You choose the language in the upper, left corner of the tool.

As a result of using the RentalCal tool, you get a number of KPI's - Key Performance Indicators on rentability of investments. But the tool not only deals with the calculation of economic efficiency from investors and tenants perspective, it also analyses the consumption of energy and resources.