I appealed and won. I asked for a copy of the information that the assessment was based on, and asked for an in-person meeting. I brought with me what basically was a mini-thesis I put together of comps that I asked my realtor to pull, printed out listings/pics of the properties recently sold in my neighborhood, pics of my house, etc, to make my case. I found some errors in the info they had (for example I do not have a finished basement) and the pictures of my house showed I did not have the kitchen or bathroom renovations shown in the listings of homes that recently sold. The assessor I met with was easy to speak with and I didn't get push back in light of what I showed. Good luck!