A landlord is seeking advice after a tenant, who is also a lawyer, has refused to vacate a property at the end of the tenancy agreement. The tenant made unauthorised structural modifications and is demanding a significant sum for them or a new two-year agreement. The tenant has also stopped paying rent and has made threats. Legal professionals suggest issuing a formal legal notice for eviction due to non-payment of rent and unauthorised alterations, followed by filing an eviction suit if the notice is ignored. The process could take several years, and the landlord is advised to consult a local lawyer familiar with relevant property laws.