One of my children recently bought a new house. I was trying to think of a good "house blessing" for him and his family. In my search, I found two that I am going to use. The first one is from 2 Samuel 7:29.
New Living Translation
And now, may it please you to bless the house of your servant, so that I may continue forever before you. For you have spoken, and when you grant a blessing to your servant, O Sovereign LORD, it is an eternal blessing!
The second is a traditional house blessing, but I think the only time I've seen it is on one of my favorite movies, It's a Wonderful Life. It will be accompanied by the items mentioned.
Bread - May this house never know hunger.
Salt - That life may always have flavor.
Wine - That joy and prosperity may reign here forever.
I hope you're blessed today!