Harris residence

At the Harris Resident they have a basement that Xander lived in after he came back from his road trip, he also had to pay rent until he got his own apartment in The Replacement

Notable Happenings
Since Xander resided in his basement for all of the forth season and some of the fifth a lot of things happened there, so examples are:


 * Several Demon attacks in "Something Blue"


 * Where Xander and Anya first have sex


 * Often where the gang hangs out


 * Where Spike resides for a while


 * Where Spike attempts suicide


 * Where Xander is killed in his dream ("Restless")


 * The first signs of Riley's leaving
 * Where the Scoobies carve pumpkins and watch "scary videos" ("Fear Itself")