1
How much to add Ethernet to a bedroom?
(alien.top)
A community to help people learn, install, set up or troubleshoot their home network equipment and solutions.
This largely depends on how classy you are, and what materials you need to go through.
The cheapest and least-classy option, is just a long cable.
The step-up is something like Powerline, where you use an adaptor that uses the power lines in your house. Still no contractor needed.
The next step is to actually wire through walls/ceilings, or to run a bunch of conduits.
If you go the powerline route, you are looking as cheap as $50-$100.
If you do the contractor route, well, it could be thousands if you run into a bunch of problems. It might only be a couple hundred though.