I fail to see how a LAN connection would help you if the bottleneck is the ISP

Can you route them under the floorboards or through the ceiling space?

If I read this correctly, an ethernet cable will not increase your down/up speed from your ISP.

You can run the cable along the skirting board

Get an electrician to see the job. They'll be able to give you estimates for various options, chasing in interior walls, doing a run outside, or possibly in ceiling cavity. They aren't that expensive.

If you can go up in to an attic or down to a basement or crawl spapce directly above or below that floor, that would be the easiest.

If not, drill the walls, put in metal or plastic conduit or other allowable raceway where it is minimally obtrusive to the room ifpossible. Pull bulk calble throught the conduits make sure conduits or other raceway will accomodate all the wiring you need, along with bend radiuses. Look for 40% +/- fill after the cabling is in.

They make em wireless now they calling it WiFi or wirelessfireless or something idk

Brick house here. Initially I only used WiFi and powerline, but the powerline had to jump to another ring circuit. I got about 150 MBps so not too bad as it was faster than my ISP.

I drilled a hole about 2m high in my living room wall to outside. On the inside I put a single junction box to mount my WAP to. I used a scutch chisel to cut a channel down to ankle level and put a double box there. I put a conduit pipe between the two boxes and fastened it to the brick with all round band. I used outdoors LAN cable from the double socket through the conduit to the WAP and then 3 cables going outside and then up through the roof into the loft. I used modular euro sockets; I would recommend them.

Drilling and chiselling brick and then plastering and painting took a long time and was hard messy work. I could have used some plastic trunking stuck to the wall but I think that's quite ugly. I don't care about the cables attached to the outside of the house; I already had multiple external cables.

If I was more skilled in building work and more patient, I would have run cables under the floors and under the stairs.

I go thru the floor but my house is made of wood and drywall.

Go up and then come down? What is the ceiling made of?

Mm you can always pass an Ethernet cable through the corridors and cover it on the wall with a "channel" or something . I passed it from first floor downto the basement through a window of the backyard around30 meter minimal loses barely visible

I’ve used IP-over-AC in the past and it worked well for me. There will be some data loss but it’s a lot less of a hassle to setup. If you own your home though, I’d probably just run the Ethernet cables. If you don’t want to drill holes, run the cables along trim and use coax staples to attach them to the wall or trim.

Drill a hole, cable is only about 6-7mm in diameter.

unused coax? use moca adapters

If you want something that looks good, there are raceways that fit pretty well with the skirting boards and look like they'd be part of them. Otherwise you can tie the network cable to the botton of the wall/skirting board and go in the space under the door. That's what I did at my place.

One thing though, you were good with wifi before, you should still be good as the cable will only affect your local network, which is also what the wifi does. Unless you're using your ISP's router for wifi which you can just get a good access point and use it instead of your ISP's router for wifi.

If you can’t do it correctly, maybe something like monoprice slim run cables tucked under baseboards? I see you’re in the eu so monoprice isn’t an option but I’d bet there are other places to get slim Ethernet cables. They’re like a spaghetti noodle in thiccness

Through a hole of some form.

Just renovating an apartment. We are redoing all the 30 years old pipes and electrical. So I ran CAT7 cables in PVC pipe from rooms to rooms underneath the floor tiles. Hopefully we can move in before Christmas.

I use Power line ethernet which works via existing electrical cabling. It works great!

https://www.digitaltrends.com/computing/everything-you-need-to-know-about-powerline-networking/

I agree that a lan cable won’t help you if it truly is the ISP rate limiting. But if you insist, the way to do it is just sting a lan cable under the doors, out into the hallway and into the other room. Maybe duck tape if you want to get fancy

Ask around or rent the SDS hammer drill for quick easy work of it. If you need a channel can use an angle grinder with a masonry blade. Use a small pressure sprayer of some sort with water to keep dust down. Use a shopvac and assistant too for the dust. Then with a couple 1" or water deep cuts horizontal use a chisel bit in the hammer drill to chip it out.

You can also use a regular circular saw with masonry blade for horizontal cuts. I've fount it easier to cut say 1" deep to get your quick line and make it straight to start then cut full depth as needed and blade will follow first cut. Again light water spray helps. Concrete patch can fill it then a little paint an nobody will ever know.

On inside use angle grinder to cut rectangle for a box at the location. Then chip out, a 3/4" concrete chisel can do detailed work.

Or run conduit on outside. The exterior grey pvc can be scuffed and painted to match exterior.

There's also lots of different trim options with a groove in back or hollow to run cables.I always suggest 3 cables to every normal location with 5 or so at a tv/media location.

One may be able to run through ceiling/attic area or a basement.

There's lot's of info here and in pinned comments.

Home Networking Basics https://www.youtube.com/watch?v=fjRKID2ucPY&list=PLqkmlrpDHy5M8Kx7zDxsSAWetAcHWtWFl

Outdoor Conduit HowTo https://www.youtube.com/watch?v=6vmX-hona2o&list=PLqkmlrpDHy5M8Kx7zDxsSAWetAcHWtWFl&index=2

Personally I run the cables up into the attic/loft and then back into the rooms. Luckily the previous owner already had TV antenna run to each room, so the holes are already there. The other option I’ve used is to follow the central heating pipes, although this only works for me as I’m using industrial cable that’s okay with the heat.

Failing that you could use power line adapters but these aren’t the best.

If you have coaxial cable already in the house, use MoCA (Multimedia over Coax) adapters.

Something like these:

https://www.amazon.com/goCoax-Adapter-Ethernet-Bandwidth-existing/dp/B09RB1QYR9/

Will give you essentially a 2.5Gb pipe between all devices for Ethernet traffic. At the entrypoint of the COAX to your house, place a MOCA filter on the incoming coax line, and this will ensure your network traffic does not leave the house over coax lines:

https://www.amazon.com/Filter-MoCA-Cable-coaxial-networks/dp/B00KO5KHSQ

Living in a rental property means I can't really drill holes, so I just thread Cat5e though the hearing conduit.

My dad would always run cords through the HVAC ductwork. Not sure if that’s up to code, but it worked for our purposes.

If you have an attic or crawl space, you could run the cables through that. Or if you have crown molding, hide the cables behind that.

Why not just using the tubes of the electrical system? Use fiber optic if you are afraid of EMI

You run a wire through the instalation hoses. Then you tie the LAN cable to the wire, pull it through and crimp it. You need to keep it under 20m or so. You can buy the pull through cable/wire yourself or buy it. The lan crimp tool can be bought for around €10. For LAN cable buy standard UTP cable.

chip the wall for an appropriate depth, install conduits and run the cables through them. Then apply suitable mortar and paint.

Painful and dirty work but that is the only proper way.

I've seen some really nice conduit run along the baseboard area, if you do it right!

Two options, if the house is "double brick" (IE brick wall that has an airspace between, them) drill a hole, and use plates to hide it again.

If its an old thick stone type building, then Google Chasing Brick Wall. The tools are not expensive, but it is messy and requires filling and repair. but its all you can do.

You can chase a double brick home if you want, but its a bit pointless.

https://www.ebay.com.au/itm/115749719205

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https://www.ebay.com.au/sch/i.html?_from=R40&_trksid=p2332490.m570.l1313&_nkw=chasing+tool&_sacat=0

Up through the ceiling or down through the floor. Alternatively, surface mount on a tacking strip or hidden in molding. Surface mount and molding hidden is good for a couple cables but not for whole trunks. If you’ve got trunk-like wire bundles you’re stuck with the better of ceiling or under the floor (where is there enough space to run the cables you need? You’re still going to have to drill through brick if going under the floor (or be really mindful of wire length). Ceilings usually have a means of going OVER the brick walls but you may not like the drop wires in the rooms you want a wired connection. It’d be a GREAT start for access points though…

If WiFi worked before, there’s no reason it won’t work with a new ISP. It may be that the router provided by the ISP is crappier than your prior one, just buy your own router or AP

Have you considered snakeing the cables through your heating vents? Good cat5 or 6 cable will tolerate the temperature in the vents?

If I have to, I always drill near the bottom, behind the baseboard (if my translation is not completely off). I hide the hole behind it and when the next wallpaper change is necessary I make a slit to the normal height and install an outlet. As a short term solution you can use the cover as cable duct until you are ready to do it properly. Keep in mind to always make straight cuts so you always know where your cables are going.

You could try power line ethernet adaptors instead of cutting up your house with cable.

Also, there's no right way to do it exactly it depends on your local building codes. For me, if I run cables though any walls it null and voids my insurance policy as it breaks building codes to have anyone other than an electrician do it. YMMV depending on where you live.