長期 ちょうき優良 ゆうりょう住宅 じゅうたくであれば
chōki yūryōjūtakudeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 長期優良住宅

1. If it were a long-term, high-quality residence; If it is a long-term, high-quality residence

Ba Conditional