Finding the market value of your property involves discovering the price most people would pay for it in its present condition. It’s not quite that simple, however, because the assessor has to find what this value would be for every property, no matter how big or how small. The assessor’s job doesn’t stop there. Each year it has to be done all over again, because the market value of almost everything changes from one year to the next – as we all know. Towns in New Hampshire have traditionally not maintained assessments at 100% of market value on a yearly basis.