Question
Is it O.K. to plant a rubber tree next to a house or will the roots cause a problem?

Answer
It depends on which "rubber tree" you're talking about.  The tropical one does indeed have invasive roots...

(http://web.ulib.csuohio.edu/SpecColl/stereos/manufact/3dv12132.html), and in Australia, it is a weed that clogs sewer pipes.  

Unless you live in southern Florida, Texas, or California, it won't survive the temperatures much below 35 degrees.  Hint: If you can grow Poinsettias outdoors, you can probably get a tropical rubber tree to grow there, also.  It would probably take DECADES for the roots to become a problem, too.  

Generally, you don't want to put a spreading tree any closer than about 5 feet next to a building, and with this tropical, I'd kick it out another 5 feet or so.  The roots can withstand being cut, but its best to avoid it in the first place.

There is the Mid-western state's version of a Rubber Tree, the Eucommia ulmoides, wich is REALLY hardy, but looks more like a maple than a tropical plant.

Hope you find a good outdoor home for your plant, if it grows in your part of the world!