In the last decade, the prevention and treatment of mental illnesses has come to the forefront of public policymaking as government awareness of the issue has increased. In Belgium, according to the 2013 Health Interview Survey, 4 out of 10 inhabitants in Brussels reported that they suffer from a mental illness. The Belgian government is currently implementing the “reform 107” to improve the provision of mental health services. This interdisciplinary study aims to identify the needs on the “front line” of mental health services by focusing on one specific municipality of Brussels: Anderlecht. The study includes three sections: sociological, economic and legal. The sociological section uses a bottom-up approach with a method of group analysis to obtain direct testimonies from professionals working in the field of mental health services. Using their testimonies, the team of researchers introduces a toolbox of recommended solutions. The economic section quantifies the proposed solutions and extrapolates the results to the rest of the municipalities in the Brussels-Capital Region. Finally, the legal section links these solutions to Belgian legislation to make them politically feasible.