There are three factors that might make you consider having your house renovated:

• There are high heating costs
• water consumption is high
• a lot of electricity is used

If at least one of these factors is present in the apartment building you live in, you should first consider making a list of the necessary action to be taken in order to reduce waste. Secondly, you should think about ordering an energy audit. The audit would provide answers to any question you might have had and gives suggestions for further action. Especially, if you find it necessary to take a loan to renovate the building, the audit can help you even more, since it calculates the payback period.