Question:
Selling our house to a non Jewish family who would remove them and probably throw them away We have 4 mezuzah and we would like to take them and place them in our new home. Is this ok?
Answer:
Yes, you should remove the mezuza. This is in order to preserve the sanctity of the mezuzah, that it should not be defiled by the gentile.
Sources:
Y:D 291-2