Setting up a wifi signal next door.?

Powerline networking will not work between two houses as the powerline signals are blocked by electricity meters. Also, the house next door is probably connected to a different phase of the local power distribution.

Is the house next door genuinely next door or is there a roadway or other obstruction between the two houses? If they are genuinely adjacent to each other you could run a long Ethernet cable between the houses.

If the two houses are to run on the Internet connection that is supplied to your house, then you probably ought to isolate your own house's networking to prevent anyone in the rented house being able to contact your computers. This will require that you install an second router in your house and connect your computers and other equipment to this second router.

Finally, any illegal activity conducted by your tenants will be associated with your ISP connection and could be attributed to you. You will probably be much safer with a separate ISP connection to your rented house rather than trying to share your own Internet connection with your tenant.

I hope this helps.

There are several ways to do this, depending upon the situation, distances involved, etc.

We'd really need more information than you've provided.

Distance?

Line of sight?

Building material

# of walls between the two locations.

You can get a Wireless router that can be put into a 'repeater' mode and will basically rebroadcast the existing wireless signal. But this assumes that the distance and interference between them is such that you can pick up the wireless signal from your primary residence in the 2nd neighboring home.

However, there is no current standard for 'repeaters' when it comes to 802.11 protocol. So there is NO guarantee that the two Wifi routers will be compatible and work together.

I've found even within the same company - their are product lines that won't work together (Linksys and their failed SRX line)

#2) You could simply buy an external antenna for your Primary router and "extend" its range. The actual antenna on most routers is only a couple of milimeters long, even though the plastic makes it look much larger. By buying a $30 external antenna - you may be able to double the range.

#3) You could also buy what is called a 'directional' antenna and place that on your primary router. Directional antennas push the radio waves in a single direction. This doubles or even quadruples range, but everything needs to be, more or less, in a single line of sight. This works best if your primary router is at 1 end of your house and the other house lies in the opposite direction.

Directional antennas can be bought or even made. Sometimes called a Yagi antenna or a 'pringles can antenna'

#4) You could also experiment with a simple 'reflector' type antenna booster. These devices are usually made out of cardboard and metal (aluminum foil) and simply 'bend' the radio waves into primarily 1 direction much like a directional antenna does. here's an example: https://www.youtube.com/watch?v=YwW26jNWAQE

#5) Don't over look the idea of physically burrying a Cat5e network cable between the 2 buildings, hardwiring them together. Takes more work and assuming the distance is less then 300ft. it can be done.

Wire is way more reliable then wifi.

___________________

Distances

Traditional WiFi based on 802.11g standard - 100ft. line of sight without obstacles.

802.11n 2.3GHz - 100ft. line of sight without obstacles.

802.11n 5GHz - 300ft. line of sight without obstacles.

802.11g/n MiMo multi antenna setup - up to 300ft. line of sight without obstacles.

Cat5e/Cat6 at 100Mbps - 300 ft.

802.11g Yagi high gain antenna and dish type receiver. Unobstructed line of sight - 1 mile

Typical real world Wifi distance with walls - 30 ft.

let you're tenant get their own internet, this removes all head aches