There is little research-based evidence regarding the similarities and differences in urban plans and urban forms, regarding urban planning and design, between planned capital cities in Africa and Asia. In recognition of the establishment of planned capital cities on these continents, this article limited its case studies to six planned capital cities of the Global South, in the post-independence and post-crisis period. By using bibliometric analysis, snowballing technique, and content analysis approaches, this study determines data sources, including books, journals, city reports, and internet blogs. The results show that these planned capital cities are similar in their urban plans: geographical, socio-cultural and demographic dimensions (location, size, and population densities), historical context of societies, and their goals and aspirations. Meanwhile, urban forms have similarities and differences based on paradigms, organization and spatial formation, spatial arrangement of activities, and architectural artefacts. This study suggests a conceptual and phasal framework, which combines planning history and theory in the first phase, and urban planning and design implementations in the second phase. The results demonstrate how considering our framework can limit similarities in the urban plans and urban forms of planned capital cities. This framework can guide urban planners and designers in academia and professional practice.