YOU SAID:
To have a seventeenth floor is considered unlucky.
INTO JAPANESE
17階を持つことは不運だと考えられています。
BACK INTO ENGLISH
Having the 17th floor is considered unfortunate.
INTO JAPANESE
17階があるのは残念です。
BACK INTO ENGLISH
It is a pity that there is a 17th floor.
INTO JAPANESE
17階があるのは残念です。
BACK INTO ENGLISH
It is a pity that there is a 17th floor.
That didn't even make that much sense in English.