Finding owner driving for dollars/tax lien foreclosure

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So I was driving for dollars and found a distressed property in a great neighborhood! Problem is I can't find the owner. The house is obviously vacant old newspapers, overgrown brush, city violations in door, etc. I looked at county records but the owners address is the same as the mailing address. No alternate mailing address. How do I contact the owner?? Also I looked up the tax bill and they haven't payed their property taxes since 2006. They owe 26,000 dollars in back taxes!! It's in a really desirable neighborhood and I figure the ARV is around $180,000. I expect this property is paid for since the deed is from 1981. How should I approach this? How long till a tax foreclosure takes place in NC? Please help!

Thanks