Troy- Are you working with an agent? If so, they should be able to explain that the assessed value has nothing to do with the selling price. The assessed value isn't an exact value on a property. You need to have a CMA done by a local Realtor who knows the area. That will show you what similiar properties have sold for in the past 3 months, which in turn will give you a clear picture of the market and help you determine what to pay. Remember everything is negotiable including new construction.