If your written lease contains a provicion where you could renew your lease for an extended period of time and the time to do so is still open, you can do so under the express terms of your lease. As such, you need to carefully read the terms of your written lease in that such controls the obligations owed to you by the landlord and vice versa.If there is no option for your to renew your lease the written document, then your landlord can refuse to extend your lease. Likewise, the landlord can increase your monthly rental as well if your current lease does not have a provision against such.I suggest that you bring your written lease to a landlord tenant attorney for further review if you have further questions about your situation.