Is it permissible to let premises for any haraam activity, e.g.

Answer

Obviously it is haraam. Letting out premises for haraam activities is to aid and abet sin and transgression which the Qur'aan explicitly prohibits. If premises was leased for haraam activity, the owner (lessor) should cancel the lease. If this is not legally possible, the lease should not be renewed. On expiry of the lease, the tenant should be evicted. Meanwhile the haraam rental should be given as Sadqah to the poor without niyyat of thawaab.