Offer for Ytong kit house / Construction on existing basement

Hello everyone, I am new here :),

We are currently in the process of demolishing an old prefabricated house on a plot we purchased down to the basement and then want to build a new house on this basement.

We are very interested in a Ytong kit house, but unfortunately we cannot assign any price to it.

Therefore, we would be very happy if someone here is familiar with this and can roughly assess it.

The construction is to take place in southern BW.

We have received the following offer:
House dimensions 10 x 9m + extension 5.5 x 4m (living area estimated 150m2)
Gable roof 38°
Kniestock 1m with 2 roof dormers over 2/3 of the length
KFW 55 standard

--> Bodenplatte Wintergartenanbau
--> Edelstahlschornstein
--> Wohngeschosswände + decke
--> Dachstuhl inkl. Eindeckung, Dämmung und Entwässerung
--> Bodentreppe (Bühne) + Treppe EG zu DG
--> Fenster Kunststoff + Rollläden (34,500 €)

Total price 139,000 € (of course almost everything in self-labor, except complex steps roof truss, ceilings, floor slab,... with assistance)

Can anyone of you estimate whether this is cheap or expensive?
Would I get a shell construction without self-labor at this price?

If you have any questions about this, feel free to contact me :)

Many thanks in advance.

Regards

Can I get a shell construction at this price without doing any work myself?

Definitely not.
(If by shell construction you mean the enclosed building envelope.)
Very roughly: €100,000 for masonry + your €34,500 for windows. But you still need the roof + chimney etc.

Can anyone of you estimate whether this is cheap or expensive?

Get comparison offers.
It is not cheap.

Hello Osnabrücker,

thank you very much for your response. So, as you described, I would save about the roof truss + chimney worth [40,000 €] through own work? Doesn't that roughly fit? What would be, for you, approximately a good price for the kit?

Basically, my concern was that I don't buy a kit now and afterwards realize, hmm... I could have had it built for that price as well.

There is far too little information for details.

Crane, scaffolding, etc. are all minor things that add up quickly in total.

Given the current market situation, you are only on the safe side with offers that you might have saved anyway.

And then it is still wrong... how much free time do you have for (e.g.) 40,000 € of own work? You have to insure your helpers. Own work also means risk (health and financial). The construction takes longer, longer rental payments, possibly availability interest charges, etc.

This is all just superficial. Take your time to ask around, get different offers. And then choose the appropriate structure that suits you, taking into account the compromises of financial, structural, and personal factors.

Why don't you conveniently start the story from the beginning and tell us first more about the property, the development plan, and the existing basement? The idea of building it yourself is one thing – and is often significantly overestimated in terms of cost savings – but then especially as a kit house, you are completely off track: the keywords existing basement and kit house are contradictory. Kits exist for standard models, but an existing house inevitably requires individual planning.

If I remember correctly, the Ytong house is already planned individually, but I still imagine that as a mason apprentice in the first year, one should not necessarily choose the increased difficulty "building on an existing basement". Apart from that, the time commitment is of course immense, which one must also be able to afford.