Congratulations
I remembered this one of Xao's so browsed the spell's section & copied it:
1. Air - Sweeping with a broom (cleansing)
2. Fire - Circling around the inside of the place with a candle (cleansing)
3. Water - sprinkling with salt water (protection)
4. Earth - Placing quartz crystals in the cardinal directions to act as wards
Then I would like to go around with a bell or a chime for one last protection/banishing element. (this could be the 5th element, spirit?)
Throughout all of these, I'd be chanting: "Infinite power of the Divine / Protect and bless this house through time" (a chant I found online).
Then it seems like many house blessings at this point do something to invite positive energy, like open all windows to the East. Some also say lavender incense can help, although generally I am not much of an incense person.
[Insert: personally I love mixed color bouquets of roses for home blessing of prosperity & love. End insert] ST
I may also do a dedication to Vesta in my kitchen, and set up a little altar.
Edit: added later
Also there's a very informative topic "Witchy Ways to Establish Our Home as Protected Space" in the WC & Wicca 101 section.