It very much depends on the landlord and the age of the house. New houses have individual counters and then you can heat as much as you want. Older houses however have common ones and then they try to save money by keeping the heating at a maximum "standard level" which is 20-22 during the day and 16-18 during the night. For me that is too cold and I have suffered in many appartments in the past because of this.

Individual heating and own washing machine is a must for me when I look for appartment.