3.4 ... and what does GDP not include?

According to the UN System of National Accounts, GDP does not include:

Most domestic services are excluded from GDP because they represent a very sbroad category and their value is based on purely imputed estimates; therefore their inclusion would effectively undermine the use of GDP statistics for economic analysis. Besides, the output of domestic services is consumed at the same time as it is produced, which means it has no other uses. The exclusion of domestic services is also important from an employment point of view: if they were counted as production in the national accounts, that would make nonsense of the concept of unemployment.

Changes in the value of assets (such as a rise in housing prices or fluctuations in share prices) are not directly mirrored in GDP figures. They are described in balances of reserves, but at least for the time being these are not computed in Finland. However changes in the value of assets are certainly reflected in GDP indirectly: if rising house prices drive up the level of rents, then that will show up in GDP figures as well.