Tipping point on home insurance?

It has been routine for several years to review home insurance and there has been a huge discrepency from the market value to the insurance value to whatever the replacement cost may be.  Who’s right, who’s wrong, I have no idea.  My default guestimate keeps me in the realm of $150 to $200 per finished square foot.  But routinely this figure, combined with the figures set forth by the insurance companies are way off.  Here is one that through me off; 106 Cedar Ave Poughkeepsie New York 12603.

About a year ago this was a vacant lot listed for about $70,000.  Now it is this;