What changes affected the working time of employees required to work from home by the 2020 French health measures? Drawing on a qualitative survey of a municipal water company, based on interviews, direct observations, and questionnaires, the author shows how telework prompted by the COVID‐19 pandemic restructured working time and redistributed the power of regulation. During lockdown periods, working hours were extended and work rhythms changed, with considerable variation depending on the family configuration: confinement with family was not conducive to extended working hours, instead tending to fragment them, whereas isolated teleworkers experienced the opposite effect.