Empty conduits on the property - ideas? - It's not too late yet :)

The question is rather what you want to do with connections at the property boundary. Everything is accessible from the house. Crossing the garage or the driveway would only serve the neighboring property.

The question is rather what you want to do with connections at the property boundary. Everything is reachable from the house. Crossing the garage or the driveway would only supply the neighboring property.

I was thinking more of an empty conduit from north to south...

You can of course do that - I would have rather installed them frost-protected in / under the house.

I would plan with two distribution boxes (with compressed air connection). One at the back and one at the front.
The control via KNX has two disadvantages. 1. Programming effort and secondly usually more expensive (different valves or additional transformer, actuators). But you are also freer. However, since you feed from the water line, the biggest advantage doesn't help you -> running several circuits simultaneously in parallel. Because the irrigation computers cannot do that.
What kind of water meter do you have (15mm, 20mm or 25mm)? How big is the pipe for the connection to the valve boxes? Usually, you do not get more than 2 m3/h through the water pipe. If you then have long distances such as around the house, you can only connect a few and small sprinklers.
To the pipe leading to the boxes, you put a drain valve. Then you blow the entire system empty with a compressor in autumn (circuit by circuit).
The Hunter rotators with the pressure-compensating housing are the first choice here. But even the mp3000 with 360° already draw 0.84 m3/h. So max two pieces per circuit. With your property size, the MP2000 is probably enough. It is important that the sprinklers water each other.
With the low water volume, all lines for irrigation should be executed in DN25. It is also easier to lay than larger diameters and cheaper.

We have several properties with automatic irrigation systems. Just today I planned the system for my sister (3000 m3 property). Therefore, there is a certain level of experience.
For our new house, we will also use KNX. But our pump also delivers 30 m3/h from the cistern (90 m3) so that we can run circuits in parallel.

For electricity and water, I would lay an empty conduit under the garage or house. That way you save having to go around the whole house. Everything else is then accessible later.

You can of course do that - I would have rather laid them frost-protected in / under the house.

I had thought about that at first, but the additional opening for laying the water in the multi-utility duct would have cost 750,-, which was too much for me. Especially since I still need power and KNX/Lan, and that doesn’t fit in one opening. Yes, it would be frost-safe, but somewhere you have to go back up to the valve box, and at the latest there you have the frost problem again, so you have to blow through in autumn anyway.

I would plan with two distribution boxes (with compressed air connection). One at the back and one at the front.

Do you have a specific model in mind? Where do you get your Hunter products from? It's somewhat more difficult than with Gardena, which you can get in any hardware store. My property is 660 sqm. The one in the picture is about half of it. The other half goes south. How would you lay out the irrigation zones here? Starting from the garage 1-2x zones towards the north and 4x zones (including shrubs and trees) towards the garden? I've heard Gardena offers better solutions for shrubs and trees, is that true? The rotators will definitely be from Hunter.

The control via KNX has two disadvantages. 1. Programming effort and secondly usually more expensive (different valves or additional transformer, actuators). But you are freer with it. However, since you are feeding from the water line, the biggest advantage doesn't help you -> running several zones in parallel. Irrigation computers can't do that.

Well, I have KNX anyway, so hardly any additional effort. If I need a computer later, I can retrofit it.

What kind of water meter do you have (15mm, 20mm or 25mm)? How big is the line for the connection to the valve boxes? Usually, you cannot get more than 2 m3/h through the water line.

I don't have one yet, which would you recommend? 25mm?

If you have long distances like around the house, you can only connect a few and small sprinklers.

My property is 22m x 31m.