A place made for the living must contain living people. A house that remains empty for a long time can fall sick from a sort of malnourishment. To banish this sort of imprint, if the house blessing is insufficient, walk around the house, chanting into every room, as well as cupboards and attic if applicable:

"Be comforted. All is well. Now you are blessed.
You have life to nurture and nurture you.
Be calm. Be easy. Be comforted. You are blessed."

You may include a hand-blessing, projecting calm and happiness with your lifted hands. You may want to cheer and brighten certain rooms with a few dancing steps to bring gaiety.