This is a very badly translated question. It doesnt actually make sense ckearly in eather language do you mean the "ongkos untuk sewa rumah ini mahal sekali"
The rent for this house is very expensive, Or better, The cost to rent this house is very high Or better, it is very expensive to rent this house
In English the rent can not be expensive, it is either 'this houses rent is very high' or 'renting this house is very expensive'. The literal translation works in bahasa, but is an error in English.