中高層ちゅうこうそう住居じゅうきょ専用せんよう地域ちいきであれば
chūkōsō jūkyosen'yōchiikideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 中高層住居専用地域

1. If it is a residential area for medium- and high-rise buildings.; If it were a residential area for medium- and high-rise buildings.

Ba Conditional
Law