Jesse's aunt's house is a completely different house than was shown in previous episodes. According to Vince Gilligan, the owners of the original house sold it so the production team had to find another location. This is explained by showing renovations being done on the house.
The trivia item below may give away important plot points.
In the scene where Mike calls Gus to tell him about the cousins breaking into Walter's house, Gus is seen looking at blueprints in his laundry business. Just a few episodes later his hidden superlab is revealed, giving purpose to his blueprints.