Eurostat is a great stop for comparable aggregated data about housing in Europe.
This is a particular index that's very likely going to gain relevance as the economic consequences of the Covid-19 crisis keep unfolding: people living in households with very low work intensity in Europe.
"The indicator is defined as the share of people aged 0-59 living in households with very low work intensity. These are households where on average the adults (aged 18-59, excluding students) work 20% or less of their total work potential during the past year. The indicator is part of the multidimensional poverty index."
Looking at the 2019 data, we find that very interestingly the countries with a highest percentage of people living in households with very low work intensity are Greece (13.8%), Spain (10.8%) and then maybe surprisingly Finland (9.7%).
The data for 2019 is incomplete, as it doesn't yet contain that of several countries, like Serbia and North Macedonia, which in 2018 had a higher percentage than Greece, and like Ireland, Belgium and Italy, which in 2018 had a higher percentage than Spain.
But, still, it already offers interesting indications that could lead to research questions and to stories.
See the table, play with some basic visualisations and download the raw data here: https://ec.europa.eu/eurostat/databrowser/view/sdg_01_40/default/table?lang=en