Urban development, and particularly the improvement of basic services delivery, is still approached in mostly technical terms by international development actors and municipalities of the Global South. Sanitation planning, for instance, remains the realm of engineers despite decades of evidence that conventional approaches focusing on infrastructure upgrading have failed to tackle socio-environmental challenges. Against this background, this paper explores sanitation planning in Mandalay, the second largest city of Myanmar. Here, the Asian Development Bank and a French consulting firm have seized the opportunity created by the country’s recent opening to embark with the municipality on a multi-million dollar scheme: the Mandalay Urban Services Improvement Project (MUSIP). Drawing upon insights from critical development studies, the paper argues that the MUSIP can be interpreted as an ‘anti-politics machine’ that ignored local needs and proposed disputable solutions to local sanitation challenges. The paper further explores how this machine jeopardised urban development in Mandalay more generally, and was eventually challenged by the municipality. The paper concludes that the case is not unique and illustrates how urban development is today being reshaped throughout Myanmar, while it also shows the continued relevance of the ‘anti-politics’ framework to understand contemporary urban development assistance projects.