In most areas, including Walpole, the tax assessment for a home does not tend to be a good indicator of selling price. If you were to look at the most recent 50 sales in Walpole right now, you'd see that some are selling quite a bit above assessment, while a few are listed and sold below. The real indicator for selling price will be the other recent sales in the same neighborhood ('comps') and the condition of the home itself. Pricing changes so frequently that you have to be looking at comparable properties every day to stay on top of it. I live in Walpole, myself. If you're thinking of selling or buying, give me a call!
It does vary from house to house, depending on condition, location & other factors. Market value is what a reasonable buyer will pay in an open market. Assessement is for tax purposes & towns do not do a physical re-assessment every year. Sometimes a home will go for below assessed value and sometimes it will go for above. Your buyer agent can help you determine market value by looking a sold comparable properties, which is the best indication of market value, not assessed values. Good luck with your home search! If you are not working with a buyers agent already, feel free to contact me. I am an Exclusive Buyers Agent located right near Walpole, in Canton, MA.
To get a picture of the real estate market in your area, you need to know sales of comparable properties and the current state of the market (going up or down) and the competitiveness of the market (are homes getting multiple offers, etc.), days on market, etc.
Find a good agent to help you sort through the data to get a better picture of reality.
Homes in Walpole seem to be following no particular trend - the condition of the house determines the sale price, not the tax assessment. The tax assessment value generally has nothing to do with the market value of the home. I would be happy to work with you to estimate the market value of any property you may be interested in.