PMI removal through appraisal

I was reading another thread about PMI and I started doing some research on getting to 20% LTV through a re-appraisal of my home via the mortgage company. It seems relatively straight forward from everything i've read but my only concern is that my property tax will go up as a result of the re-appraisal. I have about 15% more/6ish years before i hit the 80% threshold.

My house has appreciated roughly 35K over the past 3 years based on general market comps. If the re-appraisal was formally filed with the parish which i'm guessing it is, then the cost of monthly property tax outweighs the cost of the monthly PMI which means I should just forget about going down this road.

Has anyone done this and can you confirm if this is filed with the parish? Anything else I should know?

ETA: update 8/6. I just wanted to bump this thread for anyone that is considering this option. I had the appraisal done through my mortgage company and came in at 77.3% of LTV. That said, i DIDN'T get PMI removed because, to my dismay/ignorance, my mortgage company doesn't actually own the debt but rather Sallie Mae does. Therefore, I had to meet their guidelines which is 75% within 5 years of mortgage servicing. I'm not overly pissed off because I should have asked more questions and done more research but it's a bit of let down to be under 80% and still have PMI.

So, general PSA to those looking into this. Make sure you know who's guidelines you need to follow to meet the threshold for removing PMI if you get an appraisal because of general appreciation or appreciation through renovation.