Our Trulia Estimate is an algorithm derived from lots of different data points. In some cases, there isn't enough data for it to calculate an accurate enough Estimate. There isn't a way for us to know if it is a matter of data missing or there just not being enough at this time.
Regarding with the incorrect data on your property page that you reported is coming from your county records, because of this, I am unable to edit or remove the information. This data is gathered by a third-party data collector and only updates on Trulia when discrepancies are identified in the next data collection cycle. Unfortunately, we are unable to expedite this process.
That said, you have the ability to edit your home facts that appear in the Owner Information section. This includes editing the number of bedrooms/bathrooms, square footage, home features, description and more. Please know the 'Edit Home Facts' feature is currently removed from all property pages. While we do not have a timeframe for when this will be restored, I can assure you this is only temporary. Our best recommendation is to check with the county to ensure the information is correct at the source.
Please be assured if you are intending to sell your home, you (or your agent if you choose to use one) will have the ability to create a new listing with new information. The new listing will override the off-market property page with the incorrect information. One thing to consider is that when a property is off the market, it does not appear in general research results when consumers are looking through our website, therefore your property is not easily found at this time.
Thank you for using Trulia!
Consumer Care Advocate