The purpose of this thesis is to compare Belgium and Finland on energy efficiency. Before comparing these two countries I will talk about the European view on energy efficiency. The European view is the basic view for countries from the European Union (EU). The goals for the EU are described in their different energy projects. They have a project for 2020, this project contains three big objectives for energy. These objectives must be met by all the countries from the EU. Each country can choose how they want to participate and they can set their own goals. Next I will explain the view and goals from Belgium. I will also explain which tolerances they have set to meet their own goals. These tolerances can be split up in different values. The most important one being the E-value. This value is the one needed to make energy certificates. These energy certificates help the people to build, buy and rent more responsibly. After the tolerances I will talk about the way Belgium gets its energy. This can be from a non-renewable source or from a renewable source. The view of Finland is explained in the following part. I will explain the same tolerances but from Finland’s point of view. Finland has a slightly different view on most tolerances but the energy certificate is almost identical. After the tolerances I will talk about the way Finland looks at energy production. Finland thinks differently than Belgium about renewable energy sources, they put more effort into getting more renewable energy. The comparison and the conclusion is that Finland is better than Belgium in almost every energy efficient aspect looked at in the thesis. Belgium is a lot behind on the renewable energy aspect but with the building of nearly zero emission buildings (nZEB) Belgium is not so far behind.