Identification and systematization of determining and determinable factors that affect the size of land use restriction zones to ensure both the legal component of land rights and the well-being of society as a whole. Methods. The method of system analysis established the structural relationships between the determining and determinable factors related to forming zones of restrictions on land use and determining their optimal size. Establishing causation between the relevant factors and determination of their impact during the formation of restrictions' boundaries. Findings. The current state legal acts of Ukraine are analyzed, specifying the size of zones associated with different types of land use restrictions. Five groups of factors are identified that affect the spatial characteristics of the restriction zones and are crucial for setting the size of the restriction zone. The division into groups of factors allows a better approach to the further process of determining their impact and provides the basis for appropriate specialists for a comprehensive approach in determining the spatial characteristics of land-use restricted zones. It is determined that taking into account the justified impact of each factor on the overall situation, it is advisable to consider in detail and rank the level of influence within each classification group. Originality. For the first time, factors that influence the formation of boundaries of constraints by such classification as determinable and determining factors have been grouped. An appropriate approach was tested for sanitary protection zones. Practical implications. Systematized determining and determinable factors can be used to justify the sizes of all types of restrictions, which will further allow the professionals of adjacent branches to carry out easier work on the establishment of boundaries on the terrain of the respective zones and provide their legalization.

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