Am I sinful if I renew the lease contract for my basement—used for storing Christian religious books, Bibles, and church books—knowing about this activity, especially since I receive a large sum from this rent?

Renting out a house for a Haram (definition) (unlawful) purpose is forbidden, such as using it as a church or for selling alcohol or gambling, because this constitutes aiding in sin, as stated by the scholars. Therefore, renting out a house for storing distorted books that contain explicit disbelief is forbidden because it is aiding in sin and transgression. Repentance is obligatory, and the contract must be terminated immediately and not renewed, as there is no valid contract to renew in the first place. The money earned from this act contains no good, and a Muslim should prioritize their religion rather than aid in spreading falsehood.