Sejong City is undergoing significant development, with construction ongoing in its six designated living areas, particularly highlighted by the building of a public-supported private rental apartment complex in Sanwoldong set to be completed by February 2028. Workers are committed to meeting tight timelines, often working through holidays to ensure the project's progress aligns with the planned completion schedule. The city's design includes various districts focused on administrative, cultural, commercial, residential, and innovation functions, enhancing its role as an administrative hub.

The development plan divides Sejong City into six major living areas, each catering to specific functional purposes, such as education, medical services, and research. Key facilities, including government offices, cultural centers, and smart factory sites, are integrated within these zones, promoting a diverse yet interconnected community structure. The mindful planning allows for independent scaling and spatial differentiation of community services, aiming to provide a high quality of life for its residents.

Financed by a massive budget totaling approximately 22.5 trillion won (at 2003 unchanging prices), the project's stages have allocated substantial funds for development through national and local government sources. This ambitious initiative is not only transforming Sejong City into a cornerstone for enhanced governmental efficiency and urban living but is also emblematic of South Korea’s broader urban planning strategies, aimed at responsibly accommodating growing populations and evolving civic needs amid rapid urbanization efforts.