Number of network sockets; how to plan Wi-Fi in the new building?

Hello,

we need to soon determine the number of desired network sockets in the house.
Basically, we agree on where sockets should be installed (living room, office, children's room, bedroom...) to connect the non-mobile devices.
However, I am a bit unsure about what exactly needs to be planned to have good Wi-Fi reception on both floors.
What I find on the internet unfortunately exceeds my knowledge.
Could one simply install a network socket centrally on each floor and connect a device there that rebroadcasts the signal? What kind of device would that have to be?
(I have often read something about Access Points)

Please help an amateur in this field. Thank you very much.

In the "classic" floor plan with ground floor, attic, and basement with reinforced concrete ceilings, you can place the router (=Fritzbox) in the HAR on the ground floor. Now in the attic, place a LAN socket in the hallway at a height of 2 meters and possibly also in the basement. Remember the power outlet next to it. There you can set up an access point; there are also some that electricians can install as a flush-mounted Unterputz insert. Then you only see the blinking LED on the wall.

The sockets on the upper floor and basement should be consolidated in the HAR, where everything can be connected to the router.

If the HAR is in the basement, I would install a double LAN socket in the living room, feed the signal from the HAR to the router located there (because of the telephone connection), and then use the second socket to return the LAN signal to the HAR and distribute everything from there with a so-called switch. You need the switch in both setups because it always distributes to the sockets in the rooms.

The network sockets in the rooms should be available regardless; you understood that correctly! It is best to use double sockets with twin cable.

However, if you have a timber-frame construction, signal attenuation is not as critical, and usually, the router alone is sufficient, without access points. But even then, network sockets in the rooms cannot be replaced.

For a precise recommendation, one should see the floor plans, but generally speaking, one access point per floor in the hallway is a good approach. The devices should be mesh-capable, then you basically have just a single network in the house where you register your phones, etc.

I would do it almost exactly as described by Scout. If possible, though maybe consider an additional telephone socket in the basement so that you don't have to place the router in the living room at all. This way, you could park the router in the basement, which is still sufficient for regular DECT phones.

Oh, and it's best to use access points that can also do 5GHz. They don't cost more but offer more channels, i.e., less interference.

Thank you for the answers.
We are building without a basement in solid construction (concrete ceilings).

Do the APs always require a separate power outlet?
Do I also need an outlet in the utility room? Will one be enough there?

Better access points work via PoE, meaning they receive their power through the LAN cable. Either through a switch that is capable of this or as a standalone solution using an injector, which is a small intermediate device with a power connection that serves exactly this one outlet.