Sustainability Report 2019


Energy Efficiency and Reducing Greenhouse Gas Emissions

Objectives, Measures and Indicators

Description of objective

Implementation of energy-efficient modernization measures

Average Energy Intensity in the Portfolio


Average Energy Intensity in the Portfolio

Description of measures

Implementation of energy efficient modernization measures (at least 3% of the building stock a year) to boost energy efficiency and reduce greenhouse gas emissions

  • Building shells/energy-efficient refurbishment: new windows, facade insulation, attic and basement insulation
    • Around 860,000 m2 refurbished in 13,200 apartments and approx. 12,700 tons of CO2 saved
  • Heating systems: replacement of outdated systems, installation of new gas condensing boilers
    • Around 7,800 heating systems replaced and approx. 3,000 tons of CO2 saved
  • Objective for 2020: development of technical concepts for the replacement of oil heating and use of hybrid heating systems
  • Reduction in energy intensity (heating and electricity/final energy demand): 172 kWh/m2 (2017) –> 166 (2018) -–> 163 (2019) thanks to energy-efficient refurbishment, further savings effects expected to come from further building modernization measures

Energy Efficiency Standards in the German Portfolio – 28.1% in Efficiency Class C or Better*

Portfolio share in %
Energy efficiency classes in kWh/(m2a)

Energy Efficiency Standards in the Portfolio
* Year-on-year comparison only of limited informational value in 2019 due to acquisitions and new allocation of previously unreported efficiency classes, no like-for-like comparison.

Use of KfW subsidy opportunities for energy-efficient refurbishment measures

Support for the “Energiesprong” initiative

  • New refurbishment standard that represents a high level of living comfort, minimal refurbishment times and an innovative financing model
  • Target: refurbishment to net zero (energy production = energy consumption)
  • First few pilot projects started
  • Extensive involvement in dena’s “Volume Deal,” a declaration of intent released by the housing and construction industry regarding its commitment to the serial refurbishment of more than 11,600 apartments over the coming four years (as soon as the corresponding legal framework is in place)

Participation in further cooperation projects to identify new solutions for alternative, cost-efficient building refurbishment options

  • “BaltBest” to research the impact of operation on the efficiency of legacy heating systems
  • “CoSoWin” project for the development and demonstration of a smart, efficient, aesthetically appealing and multi-functional photovoltaic system that can be integrated into existing buildings (funded by the German Federal Ministry of Economic Affairs and Energy)

Description of objective

Implementation of alternative options for energy generation

Description of measures

Comprehensive review and implementation of the technical and economic feasibility of alternative energy supply options

  • Use of photovoltaic (PV) systems and cogeneration units
  • Implementation of the “1,000 roofs” program

“1,000 roofs” program

  • 2018 solar cadastre analysis: potential for PV use on around 5,000 roofs identified
  • Objectives: generate 10,000,000 kWh of solar power every year, equip 1,000 roof areas with PV modules, save around 4,300 tons of CO2 a year
  • Currently: fed into the public grid due to legal hurdles. Objective: use directly in the home or for e-mobility
  • Planned investments (2020/21): € 9 million
  • Launched in Dresden and Munich
  • More than 800 roofs already equipped with 289 PV systems
  • Objective for 2020: >60 new PV systems installed
  • Cooperation with regional installation partners for the installation of PV systems
Icon – Photovoltaic

Generate 10,000,000 kWh of solar power a year Equip 1,000 roofs with PV systems Save around 4,300 tons of CO2 every year

Description of objective

Positioning as an energy service provider

Description of measures

Expansion of energy sales by Vonovia Energie Service GmbH (VESG)

  • Sale of 23 GWh of certified green electricity to tenants
  • Certificates from predominantly Norwegian hydropower plants
  • 20,000 customers in 2019

In 2019, 20,000 customers purchased approx.

23 GWh

of green electricity from Vonovia

Description of objective

Promotion of sector coupling and neighborhood approaches

Description of measures

Research into new technologies focusing on networked neighborhood approaches

  • Cooperation launched with Fraunhofer Society on energy sector coupling in the neighborhood
    • Bochum’s Weitmar district developed as an innovation neighborhood: cooperation with Fraunhofer institutes UMSICHT, FIT and IOSB and the company Ampeers Energy GmbH
    • Objective: Bochum-Weitmar innovation neighborhood to reduce carbon emissions by 60%
    • Networked, decentralized supply system that allows the neighborhood to be as self-sufficient as possible in the supply of electricity and heating (sector coupling)
    • Implementation of the “Power House of the Future” involving the practical application of power-to-gas technology
    • Subsidy from the federal state of North Rhine-Westphalia: € 6.2 million
  • Dedicated association established: Open District Hub e. V.; Fraunhofer Society, Vonovia and twelve other partners

Objective for 2020:


reduction in carbon emissions in innovation neighborhood

Participation in MAtchUP

  • Project subsidized by the European Commission
  • Implementation in Dresden-Johannstadt
  • Objective: to develop the district into a smart and energy-efficient neighborhood
    • Collaboration involving city authorities, industry and citizens to identify solutions and development of new business models to promote energy and resource efficiency
  • Modernization of a building complex comprising 560 apartments
  • Operation of a PV system
  • Installation of charging points for electric cars

Climate Protection Through Innovation in the Bochum-Weitmar District

In partnership with renowned Fraunhofer institutes, Vonovia will be implementing a three-year hands-on innovation project as part of Open District Hub e. V. in our neighborhood in Bochum-Weitmar. The aim is to develop and test new technologies in ongoing operations. The aim of the project is to supply the neighborhood with electricity and heating that is as carbon-neutral as possible. We aim to achieve this by linking the energy sectors via a central platform. A smart, self-learning energy management system then ensures that the right energy is distributed to tenants when they need it – at electric charging stations, in the form of electricity for tenants’ own households or in the form of heating.

Climate Protection Through Innovation in the Bochum-Weitmar District

Themenfilter EN