Moving Beyond Arbitrary Percentages This is one of the most frequently asked questions we received from landlords—and the answer is far more nuanced than a simple percentage. There is no government-mandated cap of 3%, 5%, or any arbitrary figure in England. What the law does establish is a standard: the proposed new rent must not exceed the open market rent for the property. As the private rented sector evolves, particularly with the implementation of the Renters' Rights Act