Exceptional + generous, how to proceed?

That can all be done and is quite straightforward. Problems only arise when selling the house..

: the entire area may be built upon and the site coverage ratio is 0.2. I didn’t mention this further because it’s no limitation for me. I don’t want to build that big anyway.
There are no regulations for eaves height, ridge height, etc. Being single-story is definitely the only limitation. An architect also checked this beforehand.

: Of course, costs and money matter to me. I’m doing exactly as you wrote: I check my financial frame (€1,500,000, don’t like banks and dependencies, so I pay entirely from own funds), buy a plot and check the development plan. Now I check what I get for my money or what I want.
Others have an all-in budget of €500,000, I have €1,500,000 + the plot. (€1,000,000 house, €200,000 landscaping + garage, €100,000 furniture, €200,000 buffer is my rough planning). What is so objectionable about that or why should I be a troll?

Tastes are known to differ, but I simply prefer large open spaces over several smaller ones. The question is how to use everything. A 30 sqm bathroom with jacuzzi and sauna is not too big, just as a living room is not if you combine TV area, pool table, fireplace area, library etc. all together.

: It wasn’t the best year, but I think it should be enough to build a property of this size, right?
I’m now looking forward to your input.

If that is your decision, then you certainly know why there was another additional payment? Or not?

Do you want to answer my question yet?

Thanks first of all for all the answers.

: thanks for your answer and the references mentioned. I will definitely take a closer look at them. Does a "star" architect also charge according to HOAI or should I expect higher costs? Do you have experience whether it makes sense in practice to look for an architect who is located further away? I imagine that to be somewhat difficult if most things are only discussed via Internet / phone.

: Even though all those house magazines are outrageously expensive, I buy them regularly. Unfortunately, the construction costs are rarely stated in the example houses mentioned. Of course, the magazines provide many good suggestions. Accommodating or selecting all of them will probably be the next step. The resale value does not matter to me. I live here and now and not for whether and what my children inherit. The mentioned locations are not a commuter belt of Hamburg to me.

: Thanks for the hint. I really was not aware of the terrace, garage, etc. like that before. I have to say that I have had the plot for a few years and did not intend to build that large back then.

and Musketier: Because there was a tax audit for the year and the tax officer saw some things differently than we did. It is about a second notice. The first was provisional pending review. But you know that already.

: From a business point of view, it certainly makes sense to finance part. But I do not want to for various already mentioned reasons. I do not think much of such arrangements (as they are not really applicable to me). I also have no problem paying high taxes. We live in a welfare state and we should be grateful for that. In other countries I would never have the opportunities I have in Germany.

Even a "star" architect bills according to HOAI. Just with a different fee zone and fee rate.

What I can recommend to you is not to go to the architect with the wish for 4-500m² living space but to show him which rooms you want with the note that it should be spacious. Size also conceals many inconsistencies and problems in architecture and, as already mentioned, the impression of a "hall" can quickly arise if the architect designs the house purely based on your wish for "size."
The coziness, that certain something, and exactly the points that make you happy every day in your house are not the 30 sqm by which your living room is larger.

Hi,

If you look at the link below from me, you will find a similar property to what you want to build here. We have 450 sqm of living space, but with additional areas, it is over 600. The shell construction is cheap (350) and from there it gets expensive. The kitchen for that size cost 100. The paved driveway alone is about 50. Garden with everything included 200. Hi-Fi/Video are quickly gone with 100. An alarm system should not be missing in such a property and easily swallows 30-40 (video system, outdoor and indoor motion detectors, window locks, etc). The indoor pool swallowed about 300. I am happy to post pictures if I have the desire and time. All in all, our property cost a little over 3. You can save on a few things but under 2 it won't work with what you have in mind. In a house like this, everything costs a bit more. Windows won't be standard size, doors neither, etc etc... Hope this helps for now...

A few photos....