The comprehensive refurbishment of the European Patent Office's administrative building in Vienna sets a benchmark for the sustainable future of construction. This transformation of an existing structure, adhering to the highest environmental standards, serves as a clear pathway to achieving net-zero emissions by 2050 as part of the European Green Deal. Furthermore, it aligns with the ambitious goal of the European Patent Office to achieve carbon neutrality by 2030. The "Vienna Green Hub" project exemplifies a forward-thinking symbiosis of sustainability and revitalisation. The transparent and adaptable office building meets current and future user needs while responding to its "genius loci." A fusion of historic natural surroundings, a delicate wooden facade made of Austrian larch, and state-of-the-art technology make this revitalised structure one of the most sustainable buildings of its type.
Located in Vienna, the European Patent Office enjoys a uniquely historic setting, nestled between the Botanical Garden, the Salesian Monastery, and the UNESCO World Heritage Site Belvedere Palace. The targeted use of circular materials, a highly efficient timber-element facade, ecological rainwater management, heating and cooling via acoustic climate panels, and renewable energy systems has earned the project a BREEAM "Outstanding" certification—the highest ranking currently achieved in the DACH region.
Originally constructed in 1972, the building had reached the end of its operational life. Instead of opting for a complete demolition, the European Patent Office chose a forward-thinking approach to preserve the original reinforced concrete structure and pursue a full-scale refurbishment. This decision alone resulted in a 50% reduction in CO2 emissions compared to a new build.
The building services concept impresses with its outstanding energy efficiency and reliance on renewable energy. Water-to-water heat pumps are used to maximise the synergies of heating and cooling by optimally utilising heat sinks and sources. Renewable environmental energy is harnessed through geothermal probes and cooling towers. Photovoltaic modules installed on the roof and integrated into the facade, combined with a battery storage system, provide electricity to the new European Patent Office building. Surplus energy is fed into the public grid, creating a CO2 sink that offsets emissions over the building's lifecycle.
