Is it permissible to sell a commercial business in rented premises with the owner's consent or against his will, given that the law allows for this and that the value of the business may exceed that of the property?

If the commercial original refers to the trade name that distinguishes the merchant's business, then it is a financial right that he may utilize and dispose of, and prevent others from infringing upon it. There is no objection to selling it to another tenant or the property owner. The tenant is not permitted to take a sum from the new tenant unless it is within the original contract period. However, after the expiration of the period, he is not allowed to take key money.