That was a nice offer from the agent who answered before me. I live in the area. Rye went to full value assessment a few years ago.
The town changes the assessment up or down based on the market that year, so some of it might resolve itself, otherwise you can file a certiorari to bring the assessment down based on the market value.
You can do this yourself, have a Realtor help or hire a professional who does that for a living.
All the best!
Homes of Westchester