Hello,I apologize that no one has responded to your question sooner. Different experts come online at various times. I just came online and saw your question. My name is ***** ***** I’m a biologist with a special interest in trees.
Columnar oaks don't have extremely invasive roots, but they do grow in the direction of moisture. That often included water pipes and damp basements. At 12 feet from the house, there would be some risk of the roots growing into a crack in the basement or a water pipe.
There is a way to get around that. You could put in root barrier fabric in between the tree and the house. Here's a link to it:
Most of the columnar trees are fast growing and have water-seeking roots, so a barrier may be your best choice.
If you have more questions, let me know in a REPLY. I hope that whatever you decide to do, it will work out well.
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