I am just finishing off such a project:-
From my PlusNet Hub One in the hallway to Cisco 2960 8TC (no.1) in the loft - Belden Catsnake 6a - routed via stud work and a wastepipe ‘box’ between floors. I needed to make 5 cutouts in the plasterboard to achieve this.
From that switch no.1 to local audio devices (Muso Qb2, roon Core, NAS, and other planned audio outlets) Belden Catsnake 6a.
From that switch (No.1) to other bedroom & office outlets:- Amazon Cat 6 cable re-terminated at sockets with ‘keystone jacks’. All upstairs rooms have at least one of these for computers, gaming (I am online all day on Microsoft Office 365 including Teams, with VPN - very stable with two Win 10 computers)
All cables dropping through the stud work from the loft into each room (used a power multi tool to cut accesses and socket box recesses).
I will have to add another 2960 8TC (No.3) in the loft, linked to the first one by fibre optic (my choice) to complete all the upstairs rooms.
From the 2960 in the loft to a 2960 (No.2) at the AV/main hifi in the lounge - fibre optic OM1 - routed via back down the wastepipe box, via lounge ceiling, stud work, and coving (20 metre run).
Also a similar run of fibre optic OM1 to the alternative TV/hifi point (spare) in the lounge.
At no.2 Cisco 2960:-
Entreq RJ45/ Ethernet to streamer
cat 6a to TV
Belden Catsnake 6a through stud work to next room (Naim Atom)
I am doing this as a DIY project with eBay and Amazon sourced switches, fibre optic cables, socket boxes and adaptors.
The Belden Catsnake 6a cables (terminated RJ45, and ‘floating’) are all from Adam at Designacable. I am using ‘brush’ socket covers for the entry/exit socket points for these.
For the fibre optic and the cables used for computing I am using keystone jacks / sockets / brush covers from Cable Monkey (Connectix).
There are YouTube videos on the techniques for doing this project, including the plasterboard reparations - not all of them accurate.
Important tools are the aforementioned power multi tool, a ‘stud finder’, fishing tape, magnets, string, tape, hole saws, electric drill, Stanley knife, measuring tape, and patience !
An alternative design would have been to link one or more Unifi or equivalent wifi modules over PoE from the Cisco 2960’s. However not all of my audio devices support WiFi and I experience interference/dropouts from neighbours’ WiFi.
With the increased emphasis on WFH (work from home) I also saw this project as adding value to my house, hence adding extra outlets in the bedrooms.