Because the house will be built according to my wishes (including electrical plans), I can pretty much choose whatever I want. But ... what do I want?
I want to provide at least 2 LAN sockets in each room, plus some more in the living room and underneath the staircase for central infrastructure (DSL modem, NAS, WiFi, media center). I will also have at least 2 desktop computers, three audio devices, and a handful of wireless devices (laptop, smartphones). Clearly, a regular DSL modem with 4 LAN ports and WiFi won't be enough.
I have no idea what kind of Internet consumption and local network usage a family of 4 would have many years from now, and this is the only chance I'll get to make smart preparations.
What considerations should I include in my network planning?
I guess it would be smart to have a switch, right? I'd place it under the staircase along with the DSL modem, WiFi AP, NAS, and other central headless equipment. Would a patch panel be useful, or is that only used in large office buildings? Is it stupid to plan 2 LAN sockets per room? I figure 1 is not enough, but 4 is too expensive. What's the recommended minimum distance between electrical and LAN cabling? We don't build using "studs" in Europe (we mostly use bricks), so an actual measurement would be helpful. What am I forgetting?? There's always something that you only learn from bitter experience. I'd like a head start.
My goal is not a show-and-tell geek project. It needs to be reasonably affordable but also future-proof for the next 10-25 years as best as possible without introducing fiber or some such.