PghREA said:
What if the County Recorder's office measured it wrong or the person inputing the information into the computer hit a wrong number? It has been known to happen.
You're absolutely right - people can err.
One way, which is far simpler than in SFRs, is to check the condos around you. Most likely, if you're the one in error on your unit, the ones around you (same floor plan, number of bed/baths, year built, etc) will be similar sized (as long as they are the same complex. Next door at the other complex doesn't help a bit for this specific situation.).
Bear in mind that a difference of 5, 10, 25, or 50 square feet does not really matter in terms of pricing and sales. 500 square feet, even 100 square feet, can, but when it's a very small amount, it's generally not worth the cost of getting someone out to re-measure the unit, go through the rigamarole to correct the records. And all buyers should check the records before they buy to determine the recorded square footage, so that's what we should go by...the publicly available records.
Best-
CatLadyInCA