We are planning our smart home in the single-family house

Our electrician fortunately knew about KNX, but I told him where each cable should go, I installed the switches and PM/BWM in the house myself and also procured them. The actuators in the control cabinet and at the heating circuit distributors were installed by the electrician. The actuators with wiring can be tested without programming, for example, you can manually control the roller shutters via the actuator in the distribution box. In total, we spent 20k more than the GU standards. But this also includes Dali-capable ceiling spots (bathroom and house entrance), stair lighting, additional network sockets, flush-mounted boxes in the ceiling for PM, more sockets than specified in the construction service description, a larger distribution box in the HAR, and a second distribution box in the attic,...

I will talk to the GU next week and see what is possible. For example, I could imagine carrying out the pure planning with the floor plan with a KNX expert (nationwide in Germany, remote?) (what needs to go where?) and then just having the local electrician lay the cables. It would be nice if it works out that way.

There is also the possibility to outsource the KNX configuration to external system integrators if there are deficits in this area. Of course, this must be clarified with the electrician beforehand. It can go as far as the SI largely planning the system, receiving the devices from the electrician or client, configuring them, and sending them back to the construction site. Based on experience, this works very well with good planning.

Has the question of visualization already been clarified or addressed?

There is also the possibility to outsource the KNX parameterization to external system integrators if there are deficits in the field. Of course, this must be clarified with the electrician beforehand. It can go so far that the SI largely plans the system, obtains the devices from the electrician or client, parameterizes them, and sends them back to the construction site. With good planning, this usually works very well according to experience.

Has the question of visualization already been clarified or addressed?

I have just found a provider online.
€3000 for the KNX planning and, if required, delivery of all components in the control cabinet sent to the construction site.
I can well imagine such a setup.

I haven't really thought much about visualization so far, but it is also not particularly important to me. I would prefer everything to run as subtly and automatically as possible without interaction. Probably, visualization cannot be avoided anyway.

I am reading along with interest. We have not implemented so many functions via KNX for a long time (no presence detectors, no window contacts…) but we have reached about 70k in the electrical trade somewhere, and that with 156 sqm of living space + 75 sqm of basement as well as 30 sqm of garage. Originally, 30k was budgeted for conventional wiring and then KNX came into play and before we knew it, there were 40k extra in the offer. There is no manual labor included because I don’t want to have discussions later if the system doesn’t work.

I have just gone through the invoices again. It is of course not 100% accurate, as the central wiring also resulted in an extra cable meter here and there, but at least it provides an orientation of what is possible if the partner is willing. Listed are the charged additional costs of the electrician for KNX, each including tax. I do not know how much was invoiced to the GÜ for the contractually agreed standard. In total, over 3 floors plus rudimentary attic and garage, among other things, 149 sockets (of which 16 are switchable/measurable), 36x LAN, 40 lighting points including LED, 20 window/door contacts, 69 KNX device boxes were installed.

Material costs (KNX cable, window contacts in the basement, switch boxes including chasing and installation, ...): €1,952
larger meter cabinet: €666
Complete wiring labor (including controlled residential ventilation and heat pump): €4,687

In addition, I have purchased components myself for a total of €15,120