his study aims to determine the project management maturity level of four organisations in the Lesotho Water Sector. It assesses its influence on perceived project success by undertaking case studies in these organisations. It, therefore, contributes to the limited literature on project management maturity in the water sector in Africa. The results indicated that the average project management maturity was 2, with one organisation at a maturity level of 3. A total of 53% of executed projects were perceived as successful. The study found that high-maturity-level organisations tend to execute projects more successfully. Additional factors that may lead to project failure in this sector were identified.