Regardless of the mast’s location (on the ground or on a building), structures under 50 meters in height do not require notification to the competent military aviation oversight authority (for civil aviation, this threshold is 100 meters). The legal basis is the Regulation of the Minister of Infrastructure of June 25, 2003, on the procedure for reporting and marking aviation obstacles (Journal of Laws No. 130, item 1193). However, it is worth noting that, pursuant to § 26(1) of this regulation, a mast taller than 10 meters must be marked at its highest point with low-intensity obstruction lights (Type A, as specified in Annex 2 to the regulation).
The situation is different when the planned project borders aviation facilities or is located within the landing approach path (air corridor). In such cases, approval from the relevant authority is required regardless of the height of the planned mast. Municipalities have maps that define the extent of airport-adjacent zones subject to special requirements. The approval specifies the details regarding the painting and lighting requirements that must be applied to the structure.