Heating type for new construction - Which is the best?

Off Topic:

If you relocate the door to the shower bath, you gain valuable storage space under the stairs! [emoji2]
For example, for the wardrobe - I don't see one with you, despite the spacious hallway.

As I said, we have a statement from the employee of the district office.

From our experience, I can only give you the advice:

Get it in WRITING! Suddenly, no one wanted to remember any verbal promises...

Or just ignore the building authority, build whatever you want, and hope that no one complains during the construction period. Once you're settled in, they can't make a big fuss over minor issues.

Best regards,

Andreas

Get that IN WRITING! Suddenly, no one could remember any verbal promises with us...

Good advice, I think I'll do that again. However, I have a witness who can confirm the statement – our neighbor, so no one you could suspect of bias.

But it's true, what you have in writing is certain.

Don't let anyone tell you nonsense here! Of course, you can also change the heating after the building application without a new application. We did that too. And long after the building application. It was absolutely no problem! The volume must not change, heating, windows, shifting/adding interior walls, all has been no problem!

Off Topic:

If you move the door to the shower bathroom, you gain valuable storage space under the stairs! [emoji2]
For example, for the wardrobe – I don't see one in your place, despite the generous hallway.

I accidentally uploaded the first draft yesterday. Here are the latest plans.



Back to topic: I only know air-to-water heat pumps as loud and not properly heating in winter. I have to say my experience is about ten years old. I suspect the system was either incorrectly set or undersized.
Can one give a very rough estimate of the electricity consumption? How is hot water handled if one person baths and another showers? Not unlikely with two women in the household. Currently, we need 4,500 kWh due to an instantaneous water heater and an under-sink unit.

I am aware that all heating systems have pros and cons. Especially if they are not properly set. However, I think with photovoltaics, a certain degree of self-sufficiency could be achieved with an air heat pump, right?

When does your photovoltaic system supply electricity and when do you need it for heating? There will be no autarky there.