We carried out an institutional capacity evaluation as part of the Lusaka Sanitation Program to see if the pertinent institutions were prepared to oversee and carry out the suggested actions. Based on this assessment, we provided targeted recommendations for capacity-building measures to enhance institutional performance and ensure the long-term success of the program. Our efforts contribute to the development of a sustainable sanitation framework, incorporating robust Faecal Sludge Management (FSM) systems and improved infrastructure, which ultimately drives the program’s objectives forward. Additionally, we prepared an Environmental and Social Impact Assessment (ESIA) to ensure the expansion of sewer networks and FSM facilities aligns with environmental and social standards. With a strong focus on improving rural water supply and strengthening sanitation systems, the Lusaka Sanitation Program represents a major advancement in WASH infrastructure, benefiting both urban and rural communities in Lusaka.