How often should you have your home blessed by a priest?

I've never heard of doing it more than once

I've only heard of once too, unless there are have been circumstances since that warrant a new blessing (e.g., held a Séance in the house).

Around here, people ask the priest to bless a house (or business) when they move in.

Okay. Thank you

That's interesting. In both the Eastern Catholic Church and my Orthodox Church, you sign up for house blessing after every Feast of Theophany.

Think that's a question I will be asking Fr. David about.

I'm guessing rather small parishes?

Ours has over 1,000 households. Maybe if Father visited 3.7 houses per day, 365 days per year, without fail, he could bless every house once per year...