Budget for the construction of a single-family house with a WU concrete basement

If you are looking for a house at V..brock over €350,000, then this house shows up, of course the costs for the basement and special features + additional building costs come on top. So €500,000?

I can only guess what the house will ultimately cost you. But I have some tips for you from my experience.

Our house cost about 1600 €/sqm on the slab. For 150 sqm that’s about 235,000 € for a turnkey prefab house (with DIY work).
Our house achieved KFW55 standard.
A basement on our flat plot would have cost about 50,000 €, which we then decided against.

Now to your list:
2.70m ceiling height, certainly costs extra
true, but not necessarily dramatically more
Tower turret, certainly costs extra
true, also depends on the design. the fancier, the more expensive
Living basement, costs extra compared to a utility basement
can become really expensive, since in the area of KFW and insulation tens of thousands add up quickly
Earth excavation, don’t underestimate, disposal is expensive.
correct. 350 cubic meters cost me a slim 5000 euro
Electric shutters... expensive fun if you don’t want a DIY solution.
I can’t understand that. They should have cost me an extra 3,000 euros (for the whole house) at the general contractor, I assigned it myself and for aluminum shutters, foamed and fully insulated...paid 1,000 euro (!) extra compared to the “basic” option. but that was well negotiated
3 bathrooms... extra costs due to expensive tiles/labor
here it also depends on the location of the bathrooms. Piping paths in the house... complex gets expensive (and ugly)
Rainwater cistern, about 5000 € extra cost
correct. I hardly see the benefit here either. For the garden I don’t need a 5000-liter cistern, the water price means a break-even in the 22nd century for household use. Almost never pays off. One cubic meter costs me 1.50 euro... for 5000 euro I get 3333 cubic meters of water... that’s enough for an average household of 3 people for about 70 (!) years. According to online calculators, 3 people use about 47 cubic meters per year. The calculation includes showering plus bathing twice a week...
Garage, about 20,000 € extra cost
but that would be the luxury version which the OP doesn’t even want. 6*6m prefab garage on slab can be had for four figures!

As others have already said, I would also estimate the construction project for sure over 400,000 €, and depending on fittings and own work, 500,000 € is not impossible.
Overall costs basically can’t be estimated. Flooring alone can vary massively, depending on wishes.
I also have Villeroy & Boch in the bathroom, my wife liked it so much, and the tiles cost a slim 60 euro per sqm. WITHOUT installation. You take something like that for 200 sqm and then have it laid diagonally or as herringbone... good luck

Thanks Bauexperte for your comments. I just visited your homepage. Unfortunately, you are not active in our region....

Hello,

That does not necessarily mean that I cannot give you a recommendation

You wrote at the beginning: "We have 275,000 EUR available for the house [...] plus a buffer of 25,000 EUR." Where did you get this figure from? Have you ever talked to an independent mortgage broker?

If this amount is fixed, you can forget your current desired floor plan; it costs many times more with your equipment wishes. Even if you do not want to realize it with the estimated competitor colleague!

Maybe you first take up the suggestion of my predecessor; then you will see much more clearly what you can afford for 300 THOUSAND. Even though the price per sqm/living space decreases with increasing house size, quite a few additional costs come up when building a house, which also have to be covered.

Rhenish greetings