My tenant bought and installed cupboards to replace the ones in her kitchen without my permission. Now she is moving out and wants to be reimbursed for them. Do I have to pay her?

If the tenant wants to be reimbursed for the cupboards she would have to file a tenant application with the Landlord and Tenant board. It may be a difficult case for the tenant to prove, given that this is a sort of retroactive claim for reimbursement.