Not very. The reason is because the market was so bad, and the home prices dropped dramatically, but in many cases the tax asessments did not keep up, so to speak. It's one thing to have your taxes go up, and another to show that since market dropped, the house should be dropped as well. Cities depend upon those monies. 5 years ago they were "lower" than what homes could sell for....everywhere, not only River. NOW, when you see the "Real Market Value" that the tax legal puts on the property, it is usually pretty low, and should be higher. It changes continually. I would be more cognizant of the home sales around you than of the tax legal. All Realtors know this, as well, when they list a home. We do not depend upon the tax assessments. It's a PART of the entire pricing possibility, but not a key factor. And, of course, we are not seers, and cannot see what it should be totally...the market, and buyers, dictate the selling price, ultimately.
Hope that helps.