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だったら
chūkōsō jūkyosen'yōchiikidattara

Noun
Da Copula

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

1. If it were a residential area for medium- and high-rise buildings.; If it was designated as a medium- and high-rise residential zone.

Tara Conditional
Law