(1) In Tractate Mezuzah, we learn that you must put a mezuzah on a new house as soon as construction is finished, whether or not the house is occupied. [Mezuzah 2:11]
(2) However, this quotes the Mishneh Torah to the effect that it's up to the tenant to affix a mezuzah.
How do we reconcile these two statements?
If (1), what if the house is being built for rental, as an investment? Does the Jewish owner also need to put mezuzot there? If the tenants are not Jewish they may throw them out, which would be a desecration of God's name.
(For information: If the renter is Jewish and finds no mezuzot there, he must affix them, and when he leaves he may NOT take them with him, because the owner is Jewish. If the owner is not Jewish, he may take them with him. [Mezuzah 2:13])