What is the ruling on renting out a dwelling to another at a price higher than the value of its original rental contract, and what is the ruling on renting out a property before taking possession of it from the owner?

It is permissible for the lessee to rent out the leased property to another party for an increased rent, even before taking possession of it. However, if the lessor stipulates that the lessee is not to rent it out to another party, then this condition is valid, and the lessee is not permitted to rent it out in this situation.