I want to renew the lease on my apartment for 2 years. How much percent (%) will the rent increase?
ASK your LL not millions of yahoos. You can ask LL anything, and attempt to negotiate anything. Negotiation means both parties bending. Depends on rental market in your area, in the building, and desireability of building. You are offering you LL a good tenant, a known quantity, and lessening the wear and tear of tenants moving in and out, which is good.