In Europe, about 40% of the final energy consumption and 30% of the total CO2 emissions are attributed to the building sector. Consequently, buildings are at the center stage of current efforts for the energy efficiency improvement and the decarbonization of Europe. National plans focus on large scale implementation of different renovation scenarios in existing buildings to meet the 2030 targets and decarbonize the building stock by 2050.
Building stock modeling (BSM) offers a useful tool for the assessment of scenarios to support decision makers in setting up effective strategies to reach climate neutrality. One of the challenges faced for the reliable application of this modeling approach is the limited availability of detailed data for the investigated stocks. In the framework of the European project “EIFFEL: Revealing the role of GEOSS as the default digital portal for building climate change adaptation & mitigation applications” there is ongoing work to combine in-situ and statistical data from different sources (Hellenic Statistical Authority, EPC Registry) with data from Earth Observations systems to derive a bottom-up BSM of increased reliability for applications in medium scale areas (municipality) to large scale areas (prefecture). The enhanced BSM is based on the representation of the entire building stock by a set of building types defined in line with the TABULA methodology based on the use, size and age of the buildings.
This paper presents a pilot application for the municipality of Penteli, Attica. The BSM model is exploited for mapping the current state and for assessing different energy conservation measures for the reduction of final energy use and CO2 emissions from the building stock of the municipality. The potential of different strategies towards achieving the goals of the municipality for the year 2030 is discussed.


Building physicist, research director at the Institute for Environmental Research and Sustainable Development, in the National Observatory of Athens, Greece. Over 25 years of professional experience and R&D in the area of Building Physics – Thermal Performance of Buildings and Energy Conservation. Active in the areas of energy conservation, building typologies, building stock modeling, life cycle analysis, building thermal simulations and CFD. Developed and maintain national building typologies (TABULA & EPISCOPE) and perform Hellenic building stock analysis, assessing building renovation scenarios and policies for short- and near-term predictions, assessing operational and embodied energy/carbon of buildings towards decarbonization of buildings. Engaged in national EPBD transposition efforts, Member of the technical committees TOTEE 20701-3 & -4 (2010-2017). Member of the Board of Directors of the Centre of Renewable Energy Sources – CRES (2010-2013), Certificate of Excellence in Reviewing for the Int. Journal of “Energy and Buildings” (2012), National representative in IEA-Annex 35 on Hybrid Ventilation (1998-2000). Participated in over 30 R&D and demonstration projects financed by the European Commission, national ministries and organizations, and the private sector. Published over 130 archival journal papers, books and conference proceedings.