Pre-wiring for KNX

I’m building a house and looking for sensible ways to implement smart technology. Unfortunately, due to various complicated contract requirements I haven’t had much success pushing this avenue of the electrical plan. Most notably-we had to give up on the KNX install I wanted to get done while the build was going on (we are contracted to us specific electricians and they refuse to let us bring in a KNX installer or hand over parts of the electrical contract).

Fortunately, I have contacts who are able to help me get hold of certified KNX cable and a site manager who is understanding and okay with us going on site to run our own DC cables. The current plan is to wire the house back to the comms/electrical panel as standard and just leave cables in the wall. Has anyone else had to do this? I’m reading through the guides over on r/KNX to understand the network topology and will be running this past a former KNX installer - unfortunately he is more familiar with commercial projects (as is usually the case).

Primarily I just need to get all my lights controlled by KNX (the current plan is to use Shelly’s in every switch) and manage to bridge this KNX system with HomeKit/Home assistant to save me buying KNX devices and paying for expensive KNX licenses (apparently if I have less than 20 devices I can use the “basic” tier which only costs €200 but if I have more I need to go to the “home” tier which runs a cool €800 euros - more than I have ever spent on a piece of software). Has anyone else gone this route?

Edit: 170m² /1800swft 3 bedroom house. Located in New Zealand so there aren’t really any smart switches that meet our electrical standards. It’s basically just Shelly Modules

I know what I want with regards to sensors, actuators etc I’m just focusing on getting a KNX “backbone” to bolt on regular HA stuff primarily

Submitted by Mirthgiver

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