What does it mean having a building depth of 6 metres? And what if they were 28 metres? How does a dwelling vary if it has different building depth but the same amount of squared metres? As if it was a typological catalogue, participants will analise the implications that having one or another building depth would have for a dwelling. Which qualities regarding circurlation, access, sunlight, ventilation, facilities location and intimacy has a dwelling according to its depth. Identifying the strengths of each case and its problems would be a first step to make in this laboratory, so that it is possible to propose a conceptual approach according to it, afterwards.