Depreciation is assumed to occur at an even rate over a structure's economic life.
The Economic life is the period during which it is expected to remain useful for its original intended purposes.
The cost approach is most useful for newer or special-purpose buildings (schools, churches, public buildings) where there are no comparable sales.
The cap rate is determined by comparing the relationship of the net operating income with the sales price of similar properties that are sold.
Formula:
Note: a lower cap rate indicates less risk and a higher value.