How to find the exact location of a house in Google Earth?

I searched up my house in google earth an just put the address (not including the postal code). I found out it was 1 house off. I searched only my postal code, and it was 17 houses off! I know for sure what my postal code is. Is there a way you can find the EXACT location of a house in google earth? I have the newest 2010 version.