New semi-detached house - smart home setup with an extra 10,000 EUR?

but here raisins are being picked and an attempt is made to spoil something.

No, that is not the case. From a professional perspective, I showed you where the problems are and where you are leaving money on the table, and I believe I have commented on almost all points. Unfortunately, I did not find any raisins. Rather standard. It would be interesting to see a complete list; I am almost certain that considerable savings would be possible without sacrificing comfort or even getting more for the money. But you apparently do not have such a list. With your manageable installation, it is very clear why KNX is perceived as expensive. For a 17K surcharge, apparently you get virtually nothing. Of course, it is hardly possible to say anything precise based on the sparse information, but it reads like click-clack 1:1 implemented in KNX with essentials left out. Which you also confirmed.

The alarm system has nothing to do with KNX for us, as far as I remember. It should be a separate circuit,

So something proprietary. Possibly with a gateway to KNX. That can be done. It could also be that the mentioned cameras are part of it, which would explain the price. Because 3.5K is rather high. Simple VDS systems without cameras are available from 1.5/2K.

Referring to the title, I would say that nowadays you unfortunately won’t get far with 10k, unless you limit yourself or cut out what is not absolutely necessary (which we also did with weather station etc.).

Which will most likely turn out to be a mistake, because by doing that you deprive the house of certain basic functions. Well, you can retrofit later. However, you could also do it right away by rethinking the concept. But yes, it’s your decision.

I am not the classic "smart home installer," as I do not use or want to use much of what is possible or reserve it for later.

Yes, that is very clear to see/read. Although everyone understands something different by the term "classic smart home installer," and there is a range from bicycle to private jet.

What is smart? What is home?
A Smart Home does not exist as of today. “Smart” by definition would be a self-thinking house that adapts to new situations.
That does not exist.
What does exist is an automated house. A house that takes things off the resident’s hands. A house that reacts to situations predetermined by the resident in such and such a way. This is often called Smart Home. I don’t like the term. When I talk about our electrical system (for those interested), I avoid this term and rather speak of the bus system. I try to explain that all components can communicate with each other. I can adjust the behavior anytime to my needs. A button that switches the light today can open the garage door tomorrow. My favorite example: the shading decides to close the venetian blinds. I want to go outside and open the door. The venetian blinds go up so I can go out. I haven’t pressed a button. I am outside and close the door. The closing contact does not send “door closed” (the reed contact can distinguish between “closed” and “shut”). That’s why the venetian blinds stay up until I come back inside and do not lock me out. I am inside again, close the door, the reed contact sends exactly that, the venetian blinds drive to exactly the position they were before opening the door. I still haven’t pressed any button. But I can also set it so that when the patio doors open, the motion detectors are disabled and the lights in the garden switch to permanent light. If I want that. You can always spin this further.
That’s what I find smart. Even if, as I said, I don’t like the term.
We have:
- Weather station
- Two closing contacts invisible in the frame on every window/door that can be opened. The sliding door to the garden needs only one
- 11 MDT glass push-buttons
- 2 MDT control centers
- 10 MDT presence detectors
- 5 Steinel motion detectors outside, one on each facade side and one at the driveway
- 4 LED pillar lights controlled by motion detectors on the 30m access path
- approx. 15 switchable sockets
- 16 venetian blinds/roller shutters
- Preparation for awning over the terrace
- two power circuits in the garden with three switchable burners
- corresponding actuators in the control cabinet
- approx. 25 recessed ceiling lights (commonly called spots), mostly DALI dimmable
- 4 recessed lights on the stairs at knee height
- a mix of DALI and KNX dimmable actuators for all lighting
- 4 cameras plus NVR
- Door audio/video station with additional intercom on the upper floor. Image on the mobile phone when ringing, door can be opened with the mobile phone
- small MDT visualisation
- two almost fully occupied 24-port keystone patch panels
- at least two CAT6a sockets plus CAT7 installation cables in every relevant room
- Preparation for six access points on the ceiling

I think I forgot quite a bit.

That was very expensive. That’s true. But all of this, even remotely with conventional electrical work, would have been much more expensive.
And one thing is clear: nobody needs this!
But I quote Deichkind.

Unfortunately cool...

I don’t find 17K that crazy. For the 114 sqm apartment, we only paid an extra 10K for the wiring + actuators and presence detectors etc. 4k. Most of it from MDT because I find the manufacturer super likable with the extensive applications and reasonable prices. We couldn’t get any more spots, so a lot was planned with light coves + direct lighting and power rails. The mix is what makes it. Direct light for working and indirect TW light for chilling. Check out the flush-mounted power rails from Molto Luce, we have the surface-mounted ones and the lamps and quality are really great. Additionally, you have 2 separate phases for dimming or switching.

We don’t have window contacts because we first bought the apartment as a shell. But they will be retrofitted via Enocean with a Weinzierl interface. No problem at all.

Everything is parameterized by ourselves.

But even in the apartment more LAN connections were included. Duplex in every room, so 3 x 2 and 2 more in the living room. A total of 8 LAN cables or 5 connections for a 4-room apartment. Still, WLAN is on the rise and you don’t need that many LAN ports.

But the fewer LAN ports there are, the more important the position of the LAN sockets becomes. I always tend to prefer a few more, as retrofitting is difficult.

Ah ok. I thought this would build on that, since you had written about presence detectors. So these are also dedicated for the alarm system?

If I remember correctly (the conversations are almost 1 year old) presence detectors and alarm system are supposed to work together – don’t ask me how the electrics are going to manage that. I can’t guarantee you 100% about VDS, I only read that the battery is VDS certified.

In a "real" alarm system, or if we want to get professional, an intrusion detection system, separate sensors are used and these are at most read onto the bus or externally via a gateway. With a gateway this works very well with systems from Telenot, ABB or Indexa, so that the alarm sensors can also be used for comfort functions. If you build something yourself with KNX presence detectors, only the battery is certified in any form. It has very little to do with VdS anyway, because then you are not allowed to influence the system from the outside (i.e., for example from the bus) at all. Alarm systems usually have their own bus. A "real" VdS system in a private home is rare, rather VdS Home or based on VdS. For home use I am a big fan of the ABB GM/A or the Indexa 9000. The ABB connects directly to the bus, for the Indexa there is a very good KNX gateway. What is installed at your place, ? I consider it nonsense to want to make an intrusion detection system only with presence detectors. If they trigger, the professional for property transfer is already inside and then doesn’t need so much time or your fuse flips so that peace is restored quickly.

How about having a separate topic for alarm systems? I don't really see the connection with the thread.