Generally, tenants should not have to cover the cost of a rewire
Answered by Rupert, Electrical Safety Expert
Generally, tenants should not have to cover the cost of a rewire. If the property is in England or Scotland, your landlord is obliged to have the electrics checked every five years and any faults highlighted should be repaired within 28 days.
However, if you have what is deemed a "long lease" it could be out of scope of the regulations affecting privately rented properties so you should check the lease for the detail.