The value of an easement is determined by how much the landowner has lost from the rights granted. In other words, the impact it has on the burdened property. To determine easement value, the land must be appraised for its total value. This is known as the Before Value. You must estimate how much of the property is impacted and subtract it from the Before Value. What is left is known as the After Value. After subtracting the After Value from the Before Value, the Remainder will be the total value of the easement.