After Mrs. Wolowitz's death, Howard moved back into the house after he and Bernadette had moved out of their apartment and moved into the house which they decided to live in and are currently talking about renovating in "The Spock Resonance" (S9E7). Bernadette talks about how she thinks the "Jewish mother kisch theme" is depressing and she wants to change it. The rennovation has since been finished, giving a more modern theme.