What is the ruling on agreeing with the landlord to renovate the house and deduct the cost from the rent?

The landlord is obligated to prepare the leased property for habitation, such as repairing cracks, fixing broken parts, and cleaning it. If he fails to do so, the tenant has the right to terminate the contract. If both parties agree that the tenant will carry out the repairs, provided the amount is deducted from the rent, then this is permissible. The tenant must document the expenses with invoices and inform the landlord of the cost before commencing the work to avoid dispute. If they disagree on the amount spent, the landlord's word is accepted if there is no clear evidence. However, if the tenant spends money without the landlord's permission, he is not entitled to reimbursement, unless the landlord subsequently gives permission, in which case the landlord's word is accepted in determining the cost if they had not agreed upon it beforehand.