Questão jurídica principal
Whether the municipal first-height limit could validly replace the cantonal storey-height calculation under § 139 PBG/LU.
Decisão extraída
Yes. The cantonal rule in § 139 Abs. 8 PBG/LU permits replacement by a different height rule, and the municipal 8.5 m first-height limit was not arbitrary.
Fundamentação extraída
§ 139 Abs. 2 PBG/LU is an auxiliary method for measuring building/roof height when no other rule exists; where the commune validly fixes height in metres, that municipal rule prevails and still respects the statute's purpose.