We will probably just write a letter to the tax office and ask how they intend to handle this in the event of inheritance. Maybe they see it the way we do, that the house is to be attributed to me for tax purposes, and therefore no inheritance tax applies to the house. That would be the only problem I see.
And as for the rear property: we used to lease the property and bought it about 25 years ago. The district office simply missed exercising its right of first refusal at that time, which they have been very upset about in hindsight. Therefore, I assume they won't let that happen again. And if someone eventually buys the front property, knowing that they can still build a house on the rear part, then of course they want to use the rear property as a garden. If it is then snatched away from them right under their nose, and a public green space starts three meters from the house, then I suppose I would only have to hope that the person doesn’t find me and doesn’t recognize me anywhere...