In Indonesia they can decide to increase rent with unreasonable price to kick you out of their place (in this case they dont like you). If you can manage good relationship with the landlords, we can get the same price every year without increase, i experience this, i got the same price for 3 years. So, different country different culture and different rules.Sir, you and I know that this is only on paper. Nigerian landlors don't give pre rental contracts. They can decide to increase rent at anytime.