I have a listing right now at 6855 Little Cabin Road in Bettendorf Iowa that the court house records had listed at .74 acre. The previous listing (when it was new) had it at .84 acre. I took the dimensions, did some simple geometry, and came up with an exact amount of .822 acre.
When I called the Scott County Assessor's office to ask how they arrived at their figure, they said that they do not include "non-buildable" portions of the property in their figures for assessment purposes. I asked, "Then you don't include the portions of the property that have non-buildable setbacks made by ordinances and covenants?" He said, "Oh yes, we include those!" After a long conversation, he raised his figure from .74 acre to .76 acre but said that he couldn't include the 10' x 270' driveway portion of the lot.
So now I get selling agents calling me and asking, why is the county record for the lot size smaller than what you have listed on your MLS listing? Then I point out to them that the Scott County Assessor's office has a disclaimer that says, "*Dimensions used for assessment purposes only. Not a survey of the property."
It would sure be easier for everyone and less confusing for the public if assessor's offices put in the exact dimensions of the property and leave their assessment figures "behind the scenes".
What do they do in your area?