Everyone should realize that accepted rules for State Property codes vary from State to state. Each county in Texas has an appraisal system that is an arm of the state government and the county itself has no affiliation with the Appraisal District. The Texas Comptroller oversees it. Only when its schools have board members appointed.
Don't take me for someone lying and especially who doesn't know what I am talking about. I've had to go to homes with or without the owner there and possibly a dangerous pet. Measure the house if even if the owner wasn't there. Appraise it, and move on to the next property. Its not a fun job and I don't recommend it. Hell I don't recommend the ad valorum tax system itself.