도시계획의 법적 성질과 효력에 관한 고찰 ― 지구단위계획 시행지침을 중심으로 ―

Due to the increasing complexity and diversification of modern administration, urban planning has evolved into a complex administrative action that involves adjusting diverse interests. However, existing discussions in Korean administrative law have remained limited to the issue of whether urban plans constitute administrative dispositions subject to judicial review. To understand the substantive legal nature and effect of administrative plans, it is a prerequisite to look beyond the mere question of disposability and clarify which of the numerous drafts created during the planning process is finalized as the ultimate content, and through what procedures legal effect is granted. Accordingly, this study systematically analyzes the establishment procedure to examine the confirmation and validity of urban plans. This study structures the urban planning procedure under the National Land Planning and Utilization Act into three stages: ① Formation Procedure, ② Confirmation Procedure (Decision), and ③ Effectuation Procedure (Public Notice). According to this structure, the content of an urban plan is finalized through a “Decision,” but its external binding force is generated only through “Public Notice,” which announces the finalized content to the public. Consequently, the “Implementation Guidelines for the Private Sector” within District Unit Plans, which often lack proper public notice and thus remain obscure to the public, fail to meet the requirements for effectuation. Therefore, they are merely “Non-binding Administrative Plans” and cannot be recognized as having external binding force. This is because Public Notice is not a mere formality but a core procedural mechanism for effectuation that signals the existence of the administrative plan and ensures predictability for the public. Nevertheless, courts have recognized a “supplementary effect” for these un-notified guidelines, and in practice, they function as substantial requirements for building permits. This study argues that such practices seriously undermine procedural democracy and legal stability, necessitating the urgent establishment of a systematic legal doctrine. Furthermore, this study demonstrates that binding parts (Decision Documents) and non-binding parts (Implementation Guidelines) can coexist within a single urban plan, depending on compliance with the Public Notice procedure. This finding is significant as it overcomes the limitations of existing theories that simply classified administrative plans as either wholly binding or non-binding. Instead, it presents a theoretical framework that distinguishes the complex contents of administrative plans to precisely clarify their legal nature.