Originally posted by @Mark Ferguson:
Please tell me how a computer can determine the value of a home when it does not know the condition of the subject or the comps?
What makes you say "a computer" doesn't know the comps? How do you think realtors do CMAs?
Comps are easily and 100% quantifiable. You really think Zillow cannot know what homes have sold for how much in the past X months within .X miles and what the square footage of those homes was? What do you think the ZEstimate is anyway?
The better points about Zillow's inaccuracies are the less quantifiable and less obvious additions/subtractions of value: view, condition etc.
As for inaccuacies from Zillow.. this is sometimes an issue of garbage in, garbage out. And realtors pull from the same garbage for their MLS listing. Square footage is a prime example (eg non-permitted addition or county screw up on a permitted one).
If not, then why do realtors always put in their disclosure that figures are to the best of the realtor's knowledge and buyer should berify everything?
One more thought... Zillow is really bad on non-homogonous properties eg. rural property. Realtors have the same problem. I dont know how many times I have had an agent tell me, "There just aren't many comps for this property..." (Their implied conclusion is: I have little or no idea what this property is really worth.)