Diminished Value Formula
You may be wondering, is there a diminished value formula?
There are, but not any good ones.
The most well known diminished value formula is the 17c formula. Created by State Farm in the Georgia class action lawsuit, Mabry v State Farm, the 17c formula is commonly utilized by insurance companies.
Although many insurance companies utilize it to calculate diminished value, it is not very accurate and not the best method out there.