House construction provider with installation level?

Thanks in advance for the numerous replies.

What is this about: are you a configuration connoisseur who is not satisfied even with premium providers and who absolutely wants the option to lay his golden speaker cables inside the wall?

Being able to tidy up afterwards would logically be the main use for it. In my opinion, that’s not so far-fetched. Of course, one can try to take everything into account as best as possible during planning. As always, the devil is probably in the details here.

A regional, owner-managed provider: that would be a much higher top criterion for me. In the case of @wiltshire, care was taken that the provider can listen to what is important to the building family. Another candidate for, in my opinion, a top selection criterion.

We will definitely take that into consideration.

But as I said, I wouldn’t make any restriction to builders at all, but proceed in two stages as is known, set the course during dough rest, and decide only in performance phase 3 whether to limit the tender to general contractors (which is not my preferred method). Maybe the OP first takes a look at "A house-building schedule, also for you: the phase model of the HOAI!". I hope the basement question is already clarified, and the installation level is basically only an application case of the stone mantra.

We primarily do not want to restrict ourselves completely for now either. I just thought that some sort of preselection might be useful to avoid ending up with a mountain of offers and thereby not seeing the forest for the trees.

also builds, for example, with an installation level – you will basically find this at the higher-priced provider, as it is somewhat more complex in execution (but rather minimal), and also involves noticeable net room losses relative to the gross floor area. In other words: you have to be able and willing to afford it.

Are there perhaps any experience reports here on whether the net room loss outweighs the benefit of the installation level? In other words, is it so expensive in reverse that it might no longer be worthwhile?

Best regards,

We don't primarily want to completely restrict ourselves right away either. I just thought that a certain pre-selection might be useful so that we don't end up facing a mountain of offers and therefore can't see the forest for the trees.

It would also be nonsense to have too many offers created. See the whole thing as a multi-stage filter. You will talk to more providers than will ultimately create an offer.

Being able to retrofit something neatly afterwards would logically be the main use for it. In my opinion, it’s not that far-fetched. Of course, you can try to consider everything as best as possible during planning. As always, the devil is probably in the details here. [...] Are there any experience values whether the net room loss outweighs the benefit of the installation level? So is it, conversely, so expensive that it might not even be worth it?

“Detail” is the wrong word for your probably fundamentally wrong notion. An installation level is neither a full-surface empty conduit nor a cable duct where you just quickly and discreetly lift the lid. It is by no means intended or suitable for easy-peasy retrofitting, but merely enables, as described by , the location of sockets embedded in the outer wall to be determined only after the walls have been erected. Plopp, that’s it, stop, that’s where it ends.
So good that we talked about it again before your basic misconception leads you in the completely wrong direction. For your intended application, you better use classic empty conduits, which will put you more on the “stone” side of the home builder market.

We don’t primarily want to completely limit ourselves either. Just thought that some preliminary selection might possibly be useful so that you don’t end up facing a mountain of offers afterward and thus can’t see the forest for the trees.

It would also be nonsense to have too many offers made. Think of the whole thing like a multi-stage filter. You will talk to more providers than will ultimately make an offer.

Not every preliminary selection shortens the path to the goal. The smallest prime number is “2” – if you exclude all even numbers in the first step, you will never find it. Read up on the house building schedule and setting switches, then you will find the systematic way how my advisees apply (or have applied) it. In the dough resting phase with the preliminary draft, inquiries are made to a total of about half a dozen providers to determine which construction method is more suitable and cost-effective for the specific project case. Afterwards, you can deliberately continue planning a design with one construction method to filter out the top candidate in the next filter stage. Like in used car search where thousands of Golfs are reduced to a manageable number of offers by ticking “automatic,” “sunroof,” and “leather seats” boxes, this is not necessary. At the first level, I only include providers suitable for the builders, so not Daewoo and Jaguar together.

Not every preselection shortens the path to the goal. The smallest prime number is "2" - so if you skip all even numbers in the first step, you will never find it.

If you assume that there is more than just the one provider, it is forgivable if the preselection does not consider all theoretically possible providers.

Somewhere and somehow you have to sort things out. We wanted a passive house and the rest was gut feeling. In the end, we ended up with a small provider without a show house and other things. He listened and took us seriously.