I can't talk about Finland, but in Central Europe it's pretty common as there is a culture of house building. In the US, a developer typically buys an entire n

I can't talk about Finland, but in Central Europe it's pretty common as there is a culture of house building. In the US, a developer typically buys an entire neighborhood's worth of land and builds a bunch of houses there to sell to individuals. Over here, the individuals will typically buy their own small plot of land and then have a house built there according to their specifications. You need to be able to run heavy construction equipment to do so.