谷歌上这样说：
Your primary residence (also known as a principal residence) is your home. Whether it's a house, condo or townhome, if you live there for the majority of the year and can prove it, it's your primary residence, and it could qualify for a lower mortgage rate.
我问过房地产律师。律师说报税，选举人登记，驾照3合1的地址，你没把它租出去就可以作为primery resident。听上去也对