@CaitlinColema You seem to be confusing this forum for a home renovation one...

@IrelandRocks I guess you can do it that way if you want - may cause some issues eg. with handover.

@IrelandRocks Your proposed setup is fine. (I don't know what was going on with @ROBERTOJONES) One thing though - you'll be switching off your existing router's WiFi. You're replacing the WiFi...

@grizzo All Deco models are compatible with each other. https://www.tp-link.com/au/support/faq/2248/

@Cazmunich I also have brick/concrete, but 2 floors. I got some Ethernet cables run in the roof and down the outside for the ground floor and plugged the Deco's into those - works great. (Before that...

You are putting an ethernet cable through the wall between the old and new sections? Then yes. This has nothing to do with the power circuits....