Quelle mesure du coût économique et social du mal-logement ?

The poor housing situations affecting the vulnerable people (homelessness, social exclusion, overcrowding, spending too high housing, ...) are many and varied. In fact, the qualification and the quantification of impact of poor housing is complex especially since the statistics available to the scientific world does not allow to easily analyze all the forms taken the poor housing. Once identified all the costs resulting from the existence of poor housing situations, mostly registered under the program 177 of Loi de finance but which this article proposes to expand the design, we try to quantify impact of poor housing conditions on education, labor market and health. The results show the importance of the home environment on the set of selected research fields. Indeed, statistics links highlighted in particular through the econometric analysis used to conclude a significant impact of the main housing conditions both on the academic success of students and the probability of finding a job or that of reporting poor health. Quantification, monetary or not, these negative impacts of housing, although fragile given the data and the method allows to shed new light on the potential consequences of housing conditions on conditions household life taken in full and that both short but also in the medium / long term.