Talked to Janne today. He spoke to Per on Monday as promised, who told Janne that our permission was "almost finished". And yesterday, Janne received the official permission for the handling of our 'grey water' (which is the runoff from showers, sinks, etc.) The full building permission usually follows this by a few days, so Janne is quite confident now.
We'll organise our calendars and shoot for the end of May to build the foundations if at all possible. Stay tuned!