JP76 said:
The only leg you really have to stand on is if the other surrounding houses in the neighborhood have lower value on BCAD per sq ft than your property or the other similar size lots have a lower lot value on BCAD versus yours. I've heard stories of people going to protest and they will ask do you think your house will sell for more or less than what the appraisal district has it listed for? If your answer is lower you had better have comps to back it up bc I know of one case where they pulled out recent comps that showed bcad's numbers we're indeed lower than what the current market is. Just be prepared if you choose to fight and make sure you have the numbers with evidence to back it up.
There is a second tactic.
Check the appraisals for local politicians, appraisal board members, etc. Lots of times you'll see them getting favors. Everybody in town goes up 30% to 50%, except for them.
It's not a like pulling the comps, but it's damn effective. You'll see them squirm immediately.