Key legal question
Whether the three antennas had to be treated as one antenna group under Ziff. 62 Anhang 1 NISV.
Extracted holding
No. The neighboring antennas were too far away; the relevant notion of a shared building or close spatial connection was not met.
Extracted reasoning
The court held that 'building' under the NISV is an environmental-law concept aimed at preventing circumvention, but it does not make every physically connected complex one building for radiation-law purposes. Ziff. 62 Abs. 2 works as a general clause: only antenna groups emitting from a close spatial relationship count as one installation. Here, distances of 57 m and 64 m were too large.