How do you boost a signal from your neighbors wireless internet so you can get it throughout your house?

You need to set a signal booster on his router in his house.

There ways to extend using range a repeater or high-gain antenna. However in my past experience it all depends on environment and the results are not always as expected. There are basic rule of thump in wireless networking that may help 1. Keep the wireless router / Access point as high as possible with maximum distance possible from any electronic interference ( TV , Microwave oven , phones . .etc ) 2. assign non-overlapping channels (i.e., 1, 6, and 11 in the U.S.) for the SSID 3. Do not place any 2 Ghz Radio devices like phones etc ( at least 300 ft away ) 4. Considering refraction / refection of wireless signal try Hit and Trail method checking which position the wireless signal reach out the most to your location by moving the router position . . antenna of the router etc. Consder using N-Rage wireless router for maximum