Turnkey vs. Individual Contracting

Hello,

Stairs, excavation, and base slab are included. 36.5 cm masonry.
I can't really do anything myself, as I am professionally occupied. My father would coordinate, since he is retired starting from the beginning of construction.
I would commission all companies from here (regional), as I am from the village and know the companies and some employees here and there.

I think it came out at 100k

It always depends on the conditions here as well. Do I have contacts at the building materials dealer / tile layer etc., etc., and get corresponding prices or do I have to pay the list price? Do I know the trades personally and get friendship prices?

Furthermore, it sounds like the OP just wants to subcontract the other trades individually but not do anything himself. It also doesn’t sound like he is a professional. That would mean he needs a construction manager / expert... that is expensive and can quickly outweigh the financial advantages of subcontracting.

My father would coordinate it, since he is retired starting from the construction start.

Who supervises the matter professionally? Expertise is expensive.

I coordinated all the trades myself and from completion of the shell, we are doing everything ourselves (except plumbing). I had help from a friend in the family (expert / construction supervisor). Without that, I would not have trusted myself, and in retrospect, I wouldn’t have made it.

If my assumptions are correct, I don’t think the OP will save much in the end...

I am not an expert, that is correct. One knows people here and there, knows the heating engineer, the tiler is an acquaintance. An advantage I still have, I hope that is worth mentioning, is that my father built his house himself about 20 years ago.

That can work....or not. If you yourself have little knowledge and also little time, the risk is high that it will end in chaos. Alternatively, you hire an architect for this. He takes over construction management etc., costs money though. Whether the price fits now or not? How should one judge that? Roughly, it can be. Everything else you would have to, as already mentioned, submit the multi-page construction service description. And then you can only be told if something is missing or not. At best, given a direction whether it's roughly okay. Whether you are cheaper with individual contracts you will only know when it's over. Prices vary regionally a lot. Just as an example front door? Plastic/wood/aluminum?

You can only find out where you get a better deal if you take the construction service descriptions for the shell construction and the turnkey house and compare them in detail. Anything that is missing you get offers for from the local tradespeople.

In both cases, add a €50,000 buffer and then compare. Unfortunately, there is no other way. Keep in mind that with individual contracting, you may also need to hire an expert / construction supervisor for the phase after the shell construction.

Whether individual contracting is really cheaper in the end cannot be said in general. The more individual your construction is, the more lucrative, in my opinion, individual contracting becomes.

We awarded contracts individually and organized construction supervision as follows:

[*]Earthworks and deep excavation up to the base slab and slope support including piping for house connections up to the street were awarded to a local company. We were on site repeatedly, provided for the workers, praised, thanked, and had explanations about what was happening. Cost drivers were proportions of soil class 7 and the slope location.
[*]All other local companies were selected together with the carpentry company that built the house. (In your case, that would be the structural engineer.) He included 100 extra hours for construction coordination (scheduling, coordination of trades) in his offer. As above, we were involved and agreed on detailed implementations with the individual companies (materials, equipment, colors, things that occurred to us, accepted or rejected suggestions made by the companies). Cost drivers were our detailed decisions that went beyond the original scope (clay plaster with straw content, larch wood cladding of the house, special wooden floor, special tiles, additional outdoor water points, Italian glass mosaic, special lighting, switch program...)
[*]Some materials we provided ourselves, as they were not available from the companies. Overall, this was still attractive for the craftsmen within the entire project.
[*]We accepted higher hourly rates because you cannot achieve the best quality if you only employ the cheapest labor.
[*]Each company can use our house as a reference object for other customers. Since the house caused a stir and was a topic of conversation in the region during construction due to its location and appearance, this was an incentive for all involved from the very start.

The construction phase was a very happy time in our lives and largely stress-free. In summary, given the quality, individuality, and flexibility during construction, we now have a house that we certainly could not have gotten from a turnkey provider – and certainly not at that price.