Key legal question
Whether the planned annex for an electrical installation business is zoned-compatible in a residential zone.
Extracted holding
No. In a residential zone, only non-disturbing commercial and service uses serving the daily needs of housing are permissible; this business was functionally part of the construction industry and not of that kind.
Extracted reasoning
Residential zones are not limited only by immissions but also by function. The planned workshop, storage and office use, without residential content, did not match the typical development pattern of the zone and was not adapted to it.