This article presents the results of research on the organizational and professional changes of a community organization located in three low-income housing units of the Ahuntsic neighbourhood in Montréal, Canada. Using a developmental evaluation approach, the objectives of this project were to 1) document the facilitating elements and the factors constraining changes in practice; 2) understand the action of the local network; 3) support practice changes. The results show that the changes helped the organization to forge meaningful links with the residents of the HLM and to direct their interventions towards a better empowerment. Nevertheless, challenges remain, particularly with respect to the vision of the intervention, partnerships and the participation of residents.